IC Columns

MS-Clean IC

MS-Clean™ IC Series pretreatment ion colum
1、 Foreword
MS-Clean™ IC Series of sample pretreatment ion column products are suitable for all kinds of samples (such as all kinds of food, flour, dairy products, drinking water, cosmetics ）Solid phase extraction of analyte and matrix elimination of sample were carried out. The so-called sample matrix removal refers to the use of the combination between the matrix component in the sample and the stationary phase in the sample pretreatment column to keep the interference component in the matrix on the sample pretreatment column, while the analyte is not retained directly through the sample pretreatment column, so as to carry out subsequent analysis and determination. In this way, the interference of the coexisting components in the sample matrix to the determination can be eliminated. For the direct solid-phase extraction method of analyte, when the solution of the sample is passed through the sample pretreatment column, the analyte is directly retained on the sample pretreatment column due to its unique binding effect, while the matrix component in the sample is not retained, so the analyte is extracted on the sample pretreatment column through the sample pretreatment column, and then the analyte is extracted on the sample pretreatment column by the appropriate eluent This method can also achieve the functions of analyte
enrichment and sample matrix removal.

The application of the patented technology completely solves the problem of column collapse caused by high pressure. At the same time, the pretreatment of small columns with large column capacity can eliminate the matrix more thoroughly.
MS-Clean™ IC Important technical indexes of series ion small columns:

Shell: medical grade polypropylene

Screen plate: high-purity sintered polyethylene

Sealing: ultrasonic welding

Filling: spherical 40-50um macroporous resin / high capacity ion exchange resin

Volume: 1000mg

Ion residue: ppb level
Table 1 shows MS clean ™ IC series sample pretreatment column and its application:

Column type and specification	Functional group	Application example
IC-A(1.0cc)	HCO3 type quaternary amine salt	Removal of strongly retained anions and adjustment of solution pH
IC-Ag(1.0cc)	Ag + sulfonate	Removal of halogen anion
IC-Ag/H（1.0cc）	Ag + sulfonate + sulfonic acid	Removal of halogen anion and excess Ag +
IC-Ba(1.0cc)	Ba2 + sulfonate	SO₄^2-Removal of
IC-H(1.0cc) IC-Na(1.0cc)	sulfonic acidNa + sulfonate	Removal of cations (heavy metals) and regulation of alkaline solutionRemoval of cations (heavy metals)
IC-RP(1.0cc)	Divinylbenzene	Removal of hydrophobic compounds and hydrophobic substances containing hydrophilic groups, such as aromatic compounds

2、 MS clean ™ Application of IC series sample pretreatment column
2.1 MS-Clean ™ Pretreatment of IC series sample pretreatment column
In order to get the best analysis results, Ms clean is used ™ The following principles shall be followed in the pretreatment of IC series samples.
1) When using manual sample pretreatment, in order to provide necessary pressure for sample pretreatment column, 5ml size syringe should be used.

2) In order to remove the trace ionic pollutants on the sample pretreatment column and pre treat the column packing, the sample pretreatment column shall be rinsed before use according to the appropriate volume of deionized water or other appropriate solvents listed in Table 2.

When the sample pretreatment of low concentration analyte is carried out (such as 100 ppb to 1 ppm CL pretreatment with quantitative ring), the sample pretreatment column should be rinsed first according to the method recommended in Table 2. Then wash it with 2 ml deionized water and inject it into the column for blank experiment of ion chromatography. If the blank value is too large, it indicates that the rinsing of the pretreatment column is not sufficient. At this time, the pretreatment column should be rinsed again and the blank should be determined for inspection.

3) In order to optimize the treatment effect of the column bed, the sample solution should be passed through the sample pretreatment column according to the flow rate recommended in Table 2. For the sample pretreatment process based on adsorption principle, only when the flow rate of sample solution is less than 4.0ml/min can the column bed of pretreatment column be used most effectively; for the sample pretreatment process based on ion exchange principle, only when the flow rate of sample solution is less than 2.0ml/min can the column bed of pretreatment column be used most effectively. When the amount of sample solution is less than the maximum capacity, the sample passing speed can be increased properly.

4) No matter the sample solution or the standard solution, the initial effluent should be discarded. For example, after the sample solution is added into a 5ml syringe, the first 3ml of the outflow solution should be discarded, and then 2ml of the lower outflow solution should be collected for sample injection for ion chromatography.
5) If the substance to be removed is a colored material or other substance that can be observed by human eyes (such as AgCl precipitation), the sample pretreatment column can be used until the colored band extends to 3 / 4 of the outlet of the sample pretreatment column. In some special applications, if you want to get the absolute maximum sample loading capacity of the pretreatment column, you can let the sample solution pass through the pretreatment column all the time, and use appropriate detection methods for continuous detection until the penetration of the column is observed.

For example, to determine MS clean ™ The penetration volume of IC Ag pretreatment column for Cl ~ - can push many parts of 2ml Cl ~ - solution through the pretreatment column under pressure, and make the outflow liquid flow into the beaker containing 5-10ml0.1n AgNO3 without interruption. When it is observed that the first generation of AgCl precipitation occurs, the penetration of the pretreatment column occurs. At this time, the volume of sample solution passing is the penetration volume of the system.

6) It should be noted that the pre-treatment column must be used in a vertical position so that the best results can be obtained for the sample pre-treatment.

Table 2 ms clean ™ Pretreatment method of IC series sample pretreatment column

Column type and specification	Flushing reagent	Volume of flushing agent（mL）	Maximum flow rate（mL/min）	Volume of effluent to be discarded (ML)
IC-A
1.0cc	Deionized water	10	2	3
	Deionized water	16	2	6
IC-Ag
1.0cc	Deionized water	10	2	3
	Deionized water	16	2	6
IC-Ag/H
	Deionized water	16	2	6
IC-Ba
1.0cc	Deionized water	10	2	3
	Deionized water	16	2	6
IC-H
1.0cc	Deionized water	10	2	3
	Deionized water	16	2	6
IC-RP
1.0cc	1.methanol 2.Deionize dwater	5 10	4	3
IC-Na	1.methanol 2.Deionize dwater	12 18	4	6

2.2 how to use MS clean ™ Recovery test of IC series sample pretreatment column

The matrix removal recovery experiment can be used to evaluate the loss of analytes due to the retention of matrix components on the sample pretreatment column. In most ideal pretreatment methods, the recovery should be close to 100%. The recovery rate can be determined by the following method: let the solution of an analyte pass through the sample pretreatment column at a certain flow rate, the sample matrix is retained on the column and removed, while the analyte passes through the column, determine the concentration of the analyte passing through the column, and then calculate the recovery rate. The specific determination method is as follows:

A first, the sample pretreatment column is pretreated according to the method recommended in Table 2.

B. correct the ion chromatography with a suitable standard solution.

C for 1.0cc pre-treatment column, push the standard solution of ion chromatography through the pre-treatment column under pressure, discard 3ml of the previous effluent, and collect 2ml of the subsequent effluent for ion chromatography analysis. For the pre-treatment column, push the standard solution of ion chromatography through the pre-treatment column under pressure, discard 6ml of the previous effluent, and collect 2ml of the subsequent effluent for ion chromatography analysis.

D. use calibration and correction method to quantify the treated standard solution.

If the calculated recovery is not satisfactory, the sample may have been diluted by the liquid present in the pretreatment. The reason for this may be that the volume selection of the discarded effluent is not accurate enough. In general, for the 1.0cc pretreatment column, the volume of 3ml of the discarded effluent is sufficient, while for the pretreatment column, the volume of 6ml of the discarded effluent is sufficient.

E standard addition experiment was carried out in the sample matrix, and the recovery determination calculation was repeated.

Sometimes, the recovery is low, which may be caused by the coprecipitation of the analyte and the matrix and the retention of the column filler (such as Ag column and Ba column), or the combination of the analyte with the matrix component, sometimes the recovery can be improved by adjusting the solution pH. For example, for Ag and Ba columns, when the recovery is low, appropriate dilution of sample solution can improve the recovery. This is because if the content of matrix ion is too high, some analytes can be adsorbed by the precipitate when the matrix component precipitates when passing through the column, resulting in the decrease of recovery rate, which can be eliminated to a certain extent by diluting the solution.

In the picture:

A is secondary deionized water passing through MS clean ™ Chromatogram after IC column

B is the chromatogram of direct injection of secondary deionized water

C is the chromatogram of secondary deionized water passing through a brand of imported small column

D is the chromatogram of secondary deionized water passing through a domestic brand of small column
It can be seen from the comparison spectrum that Ms clean ™ The ion residual concentration in IC series pretreatment column is very low, which ensures the accuracy of detection. However, there are nitrate and sulfate ions in some brands and imported brands, which will affect the detection of actual samples.

2.3 MS-Clean ™ Ic-H column

MS-Clean ™ Ic-H column is a sample pretreatment column with H-type polystyrene based strong acid resin as the seasoning. The resin has good selectivity for multivalent cations such as calcium and transition metal ions. The pretreatment column is mainly used to remove alkaline earth metal ions, transition metal ions and carbonate ions from the sample matrix, and also to neutralize the strong alkalinity of the sample solution. Under the condition of sufficient water swelling, the cation exchange capacity of 1.0cc pre-treatment column is 2.0 ~ 2.5meq, and the cation exchange capacity of this kind of pre-treatment column is 6.0 ~ 6.6meq. Using this kind of pretreatment column of 1.0cc, 10ml of 0.2MNaOH can be neutralized; using this kind of pretreatment column, 30ml of 0.2mnaoh can be neutralized, and this kind of resin can keep stable in the range of pH 0 ~ 14.

2.3.1 MS-Clean ™ Application of Ic-H column: carbonate CO₃^2- removal

Combined with nitrogen or helium purging operation, the pre Ic-H column can remove CO₃^2- ions from the sample solution very effectively. The process is to first pass the sample solution through the pre Ic-H column in the standard method recommended in Table 2. In this process, the sample solution is acidified, the carbonate CO₃^2-- is converted into H₂CO₃, and then the solution can be cleaned by purging the solution with nitrogen or helium for 5min. With this method, the carbonate CO₃^2- - which is more than 400ppm can be removed from no less than 10ml of sample solution. Of course, the process will also be affected by the concentration of other cations in the sample.

2.3.2 MS-Clean ™ Application of Ic-H column: acidification of sample solution

And MS clean ™ IC-RPcolumn binding, Ms clean ™ The Ic-H column can be used to remove the interfering weak acid matrix components in the sample solution. The process is to first pass the solution through MS clean ™ If the Ic-H column is used, the solution will be converted to acid. At this time, the weak acid interference matrix component in the solution will exist in the form of hydrophobic electric neutral, and then the solution will pass through MS clean ™ If IC-RP column is used, the weak acid interference matrix component will be adsorbed on MS clean ™ On the IC-RP column, the tested components pass through the column, so as to eliminate the interference.
2.4 MS-Clean™ IC-Agcolumn
MS-Clean™ IC- AGThe column packing of the column contains the silver salt Ag + form of strong acid cation exchange resin. In addition to the ionic silver salt Ag + form MS-Clean™ IC -Ag Column packing andMS-Clean™ IC-H The packing of the column is similar.MS-Clean™ IC-Ag The role of the column is to use the principle of silver salt precipitation to remove the Cl^-、Br^-、I^-、AsO₄^3-、CrO₄^2-、CN^-、MoO₄^2-、PO₄^3-、SeO₃^2-、SeCN^-、SO₃^2-、S^2-、SCN^-andWO₄^2-plasma.The recovery of the target compound should be investigated before using this method.In addition, the recovery of NO₃^- ions in acid solution is low, and the recovery depends on the acidity and volume of the sample solution.
When the resin is fully expanded with water, 1.0cc MS-Clean™ IC-Ag The column capacity is 2.0 ~ 2.2meq,Specification MS-Clean™ IC Ag The column capacity is 6.0 ~ 6.6meq.For example, using the 1.0cc specification MS-Clean™ IC -Ag The column can handle about 9ml of 1% NaCl solution, using 2.5 CC MS-Clean™ IC-Ag The column can handle about 27ml of the solution.In use MS-Clean™ IC Ag There is often a joint at the back of the column MS-Clean™ IC -H colum.Its purpose is to use MS-Clean™ IC- H The column captures the possible penetration of Ag + ions, which can protect the subsequent analytical column.
You should also pay special attention to the use of MS clean ™ IC-Ag column timeThe pH of solution should be below 7.0. If the pH of solution is equal to or greater than 7, silver oxide precipitate will be generated to make MS clean ™ The IC-Ag column turns black.
2.4.1 recovery data
Use MS clean ™ When IC-Ag column,The recoveries of 2 mg /L F^-, 10 ppm SO₄^2- - and 15ppm NO₃^-were over 98%.If the recovery of the analyte is low, the sample should be diluted properly. Sometimes, the adsorption of analyte on the precipitation will occur.Table 3 shows the ms-clean with specifications ™ Residual situation of Cl - ion in solution after IC Ag column treatment

Cl^-Initial concentration（mg/L）	Cl^-Residual concentration（mg/L）
0	0.10
100	0.1
200	0.1
300	0.12
400	0.13

When PO₄^3- is one of the analytes,The effect of matrix on the recovery of PO₄^3- should be considered.PO₄^3- can precipitate with Ag⁺ ions and affect its recovery.The extent of this effect depends on the composition of the sample matrix. At this time, the standard addition method should be used to investigate the recovery of PO₄^3-.

In the figure:
A is 100mg / L Cl^- standard solution passing MS clean ™ Chromatogram after IC-Ag small column

B is the chromatogram of 100 mg / L Cl^- standard solution after passing through a domestic brand of small column

C is the chromatogram of 100 mg / L Cl^- standard solution after passing through a brand of imported small column

Not hard to see: Ms clean ™ The removal efficiency of IC-Ag type pretreatment column for chloride ion is equivalent to that of imported brands.

It can be seen from the chromatogram that the high concentration chloride solution passes through MS clean ™ After IC Ag column, the removal rate of chloride ion is over 99.95%, which solves the interference problem of nitrite ion determination.
2.5 MS-Clean™ IC Ag/H column
MS-Clean ™ IC-Ag /H column () is a laminated composite resin column containing IC-Ag and IC-H resins.
MS-Clean™ IC- Ag/H The column packing contains high capacity strong acid cation exchange resin (IC Ag) in the form of silver salt.The column can be used to produce precipitation by removing it from the sample solutionCl^-、Br^-、I^-、AsO₄^3-、CrO₄^2-、CN^-、MoO₄^2-、PO₄^3-、SeO₃^2-、SeCN^-、SO₃^2-、S^2-、SCN^-and WO₄^2-Waiting for Laozi.When the sample is treated by this method, the recovery of the analyte should be determined and investigated. The recovery of NO₃^- may be low when the sample is treated in acid sample solution. The degree of the low recovery depends on the pH of the solution and the volume of the sample solution.
MS-Clean™ IC- Ag/H The packing of the column also contains the H⁺ type strong acid polystyrene type cation exchange resin（IC-H）。The resin has a good choice for multivalent cations such as transition metal ions and Ca^2+.The original design of the composite column is to remove the higher concentration of alkaline earth metal and transition metal ions from the sample matrix, neutralize the strong alkaline sample solution and remove the carbonate CO₃^2-.In the structure of the composite column, Ms clean Gamma The IC h resin is placed in the outer layer of the two-layer structure, which can remove soluble Ag⁺ ions and other cations from the sample matrix.This two-layer composite column can be used to replace two single columns connected in series. In addition, the column also has the total amount of Ag⁺ removed.
MS-Clean™ IC-Ag/H The column capacity of the column is 5.5meq（IC -Ag）and 1.0meq（IC-H）。
2.6 MS-Clean™ IC-RP
MS-Clean™ IC-RP The column packing is a kind of reverse packing with macroporous structure. This kind of resin has high selectivity for hydrophobic compounds, especially unsaturated compounds and aromatic compounds, and can match with organic solvents of high performance liquid chromatography. It can keep stable in the whole pH range, i.e. pH0 ~ 14.IC-RPcolumn can be used in many fields instead of C₁₈ bonded silica gel in many cases,Especially when the acidity or alkalinity of the sample solution is very strong。IC- RP The column is mainly recommended to remove the following substances from the sample matrix: aromatic dyes, hydrocarbons, surfactants and some organic carboxylic acids.IC- RP The column can also be used for the enrichment of some trace components. In this technology, some trace substances are first separated from the sample matrix and concentrated on the IC-RP column,Then, these substances are eluted from the column with the smallest amount of suitable solvent. In this process, the purpose of separation and enrichment of trace substances is achieved. Since the column packing does not contain anion and cation exchange sites, it will not retain ionic substances, so before ion exchange analysis,IC-RP column is often used to remove hydrophobic pollutants from the sample matrix.In the reverse phase mode, the main mode of action of PVB resin is hydrophobicity. When the IC-RP column is used to treat the aqueous solution, the column should be treated with appropriate amount of methanol (see Table 2: pretreatment methods of various sample pretreatment columns). The main purpose of methanol treatment is to wet the surface of the filler, so as to maximize the treatment efficiency of the resin. From the following two experiments, we can fully see the effect of column treatment with methanol:Two IC-RP columns were used to treat 5 ml 1000 ppm sodium dodecyl sulfate solution at a flow rate of 4.0 ml / min.One of the two columns was pretreated with methanol and the other was not pretreated with methanol. The concentration of sodium dodecyl sulfate in the solution from the column pretreated with methanol was 24ppm, while that from the column pretreated with methanol was 979ppm. This shows that the IC-RP column without methanol treatment has no reservation for anionic surfactants.
2.6.1 recovery data

The pH value of the solution has a very important effect on the recovery of carboxylic acid. When the acidity of the sample solution is at the pH value which makes the carboxylic acid protonated, the recovery of carboxylic acid is seriously reduced. Table 5 briefly summarizes the use of MS-Clean™IC- RP The recovery data of several carboxylic acids, including monovalent, aromatic and divalent carboxylic acids, were analyzed. The data was obtained by the first 3ml of effluent was discarded, and then the subsequent 2ml of effluent was collected for determination.
It can be seen from table 5 that for organic carboxylic acids with strong hydrophobicity, adding a small amount of isopropanol into their solution is conducive to increase the recovery of carboxylic acids.
Table 5 ms clean ™ Recovery of some carboxylic acids by IC-RP column

Substance (concentration ppm）	pH2.5（aq）	pH4.5（aq）	pH4.5（2%IPA）	pH 6(aq)
acetic acid （5）	50%	81%	100%	100%
Valeric acid （20）	0%	0%	10%	3%
Benzoicacid （10）	0%	3%	14%	8%
Succinicacid （10）	50%	100%	100%	98%
tartaric acid （10）	100%	101%	100%	100%
Note: the accuracy of measurement results is within 5%

Some data show that some hydrophobic organic acids can be used when the pH of sample solution is adjusted to less than 2.5 MS-Clean™ IC -RP Column removal.
2.6.2 MS-Clean™ IC- RPColumn application: removal of surfactants
In addition to being used in reverse phase mode, IC-RP columns can also be used in the removal of ionic materials by ion pair. In this way, the recommended ion pair reagent is tetramethylammonium hydroxide. The loss of inorganic anions increases significantly when using ion pair reagents larger than tetramethylammonium hydroxide, such as tetraethylammonium hydroxide and tetrapropylammonium hydroxide.Any substance that can be retained by MPIC with NH₄OH or tmaoh ion pair reagent can be removed from the sample matrix by ion pair with IC-RP column. Generally speaking, for the removal of anions, the column capacity of 1.0cc ic-rp column is larger when the ion pair is used than when the reversed-phase operation is used; for example, in the reversed-phase mode, the amount of sodium dodecyl sulfate that can be removed by 1.0cc ic-rp column is 20 mg, while when tetramethylammonium hydroxide is used as the reagent and the ion pair operation mode is used, 1.0cc IC -90 mg of sodium dodecyl sulfate can be removed by RP column. In reverse mode,MS-Clean™ IC -RPColumn pair F^-、Cl^-、PO₄^3-、NO₃^-、and SO₄^2- rate of recovery＞98%；When tetramethylammonium hydroxide is used as reagent and ion pair operation is used, Ms clean ™ The recovery of these ions by IC-RPcolumn is more than 96%.
2.7 MS-Clean™ IC -A column
MS-Clean™ IC -A column（1.0cc）HCO₃^-Polydivinylbenzene strong base anion exchange resin. The resin is an anion selective resin, which is mainly used for the removal of anionic impurities in the sample matrix and neutralization of acid samples. It is mainly suitable for the analysis of cation. The column is also used to remove anionic amino acids, peptides, proteins and other contaminants from glycoprotein hydrolysates or carbohydrate samples. When the water is fully swollen,The exchange capacity of 1.0 cc IC-A column is 0.7 meq, and that of IC-A column is 2.1 meq. In addition, the resin remained stable at pH 0 ~ 14.

3、 Select MS clean related ion column according to relevant standards

No	Standard No	Standard name	Pretreatment column type	Pretreatment column action
1	GB/T 20188-2006	Wheat flour determination of bromate ion chromatography	Ag / h composite type, or Ag column and H column in series.	Remove chloride ion and eliminate its interference to chloride ion
2	GB/T 24800.13-2009	Cosmetics - Determination of nitrite - ion chromatography	IC-RP	Remove the organic matter from the sample
3	GB/T 24876-2010	Determination of seven anions in livestock wastewater by Ion Chromatography	IC-RP、IC-H	RP:Removal of organic matter; H-column: removal of heavy metals
4	HJ84-2016	Water quality -- Determination of inorganic anions -- IonChromatography	IC-RP、IC-H	RP:Removal of organic matter; H-column: removal of heavy metals
5	HJ812-2016	Water quality -- Determination of inorganic cations -- Ion Chromatography	IC-RP	RP:Removal of organic matter
6	HJ799-2016	Ambient air particles determination of water soluble anions ion chromatography	IC-RP、IC-H	RP:Removal of organic matter; H-column: removal of heavy metals
7	HJ778-2015	Water quality -- Determination of iodide -- Ion Chromatography	IC-RP、IC-H	RP:Removal of organic matter; H-column: removal of heavy metals
8	NY/T 1374-2007	Determination of fluorine in plant products by Ion Chromatography	IC-H	Remove the carbonate produced during sample treatment
9	NY/T 1374-2007	Determination of nitrite and nitrate in plant products by Ion Chromatography	IC-RP	Remove the organic matter from the sample
10	SN/T 3138-2012	Determination of bromate in flour products for export	IC-RP、IC-Ag,IC-H	IC-RP column: removal of organics in samples IC-Ag column: removing chloride ions from samples IC-Hcolumn: removal of fallen Ag ions
11	SN/T 3151-2012	Determination of nitrite and nitrate in export food by Ion Chromatography	IC-RP、IC-Ag、IC-H	IC-RP column: removal of organics in samples IC-Ag column: removing chloride ions from samples IC-H column: removal of fallen Ag ions
12	SN/T 3528-2013	Cosmetics for import and export -- Determination of sulfite and bisulfite -- Ion Chromatography	IC-RP	Remove the organic matter from the sample
13	SN/T 3608-2013	Cosmetics for import and export -- Determination of fluorine -- Ion Chromatography	IC-H	Remove the carbonate produced during sample treatment
14	SN/T 3636-2013	Determination of sulphate in export food by Ion Chromatography	IC-RP、IC-Ag、IC-Na	IC-RP column: removal of organics in samples IC-Ag column: removing chloride ions from samples IC-H column: removal of fallen Ag ions
15	SN/T 3727-2013	Determination of iodine content in exported food by Ion Chromatography	IC-RP	IC-RP column: removal of organics in samples
16	SN/T 3931-2014	Determination of formic acid and its salts in exported food by Ion Chromatography	IC-RP、IC-Ag、IC-Na	IC-RP column: removal of organics in samples IC-Ag column: removing chloride ions from samples IC-H column: removal of fallen Ag ions
17	SN/T 4041-2014	Determination of fluoride and bromides in exported food by Ion Chromatography	IC-RP	IC-RP column: removal of organics in samples
18	SN/T 4049-2014	Determination of chlorate in food for export -- Ion Chromatography	IC-RP	IC-RP column: removal of organics in samples
19	SN/T4392-2015	Cosmetics and soap products - Determination of hydroxyethylphosphoric acid and its salts - ion chromatography	IC-RP	IC-RP column: removal of organics in samples
20	GB/T 5009.33-2010	Determination of nitrite and nitrate in food	IC-RP、IC-Ag、IC-H	IC-RP column: removal of organics in samples IC-Ag column: removing chloride ions from samples IC-H column: removal of fallen Ag ions
21		Raw milk and milk products -- Determination of thiocyanate -- Ion Chromatography	IC-RP	removal of organics in samples
Ordering information:
Part No	name	Specifications	purpose
MSICH1000	IC-H type	1000mg，1cc，50branch/pk	The alkaline earth metal ions, transition metal ions and carbonate ions in the sample matrix are removed, which are also used to neutralize the strong alkalinity of the sample solution.
MSICNA1000	IC-Na type	1000mg，1cc，50branch/pk	Remove transition metal ions and alkaline earth metal ions from the sample.
MSICAG1000	IC-Ag type	1000mg，1cc，50branch/pk	Remove the Cl^-、Br^-、I^-、AsO₄^3-、CrO₄^2-、CN^-、MoO₄^2-、PO₄^3-、SeO₃^2-、SeCN^-、SO₃^2-、S^2-、SCN^-andWO₄^2- plasma from the sample solution
MSICAGH1000	IC-Ag/H mixed type	1000mg，1cc，50branch/pk
MSICRP1000	IC-RP type	1000mg，1cc，50branch/pk	Remove hydrophobic compounds, especially unsaturated compounds and aromatic compounds with pH range of 0-14.
MSICBA1000	IC-Ba type	1000mg，1cc，50branch/pk	Remove the sulfate ion from the sample.
MSICC181000	IC-C18 type	1000mg，1cc，50branch/pk	Remove hydrophobic compound pH range 2-8.

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