Linkage type cation chromatographic column and its preparation method

A cation chromatography and bonding technology is applied in the field of preparation of grafted cation chromatographic columns, which can solve the problem that the cation chromatographic column cannot analyze alkali metals at the same time, and achieve the effects of simple preparation process and low manufacturing cost.

Inactive Publication Date: 2005-03-09
ZHEJIANG UNIV
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  • Application Information

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Problems solved by technology

[0003] In order to overcome the problem that the cation chromatographic column cannot analyze cations such as alkali metals, ammoniums and alkaline earth metals at the same time, the present invention provides a low-cost bonded cation chromatographic column capable of simultaneously analyzing alkali metals, ammoniums and alkaline earth metals cations Preparation

Method used

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  • Linkage type cation chromatographic column and its preparation method
  • Linkage type cation chromatographic column and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0013] Embodiment 1: the manufacture process of cationic chromatographic column is as follows, and its steps are:

[0014] (1) First, 55% styrene-divinylbenzene microspheres were synthesized by emulsion polymerization, and the microspheres with a narrow distribution of about 8 μm were selected as the chromatographic packing matrix.

[0015] (2) Mix base balls and a certain amount of pyromellitic anhydride in a nitrobenzene environment, use anhydrous zinc chloride as a catalyst, stabilize the temperature at 50 degrees Celsius, react for 6 hours, take out the bonded microspheres and wash them with ethanol , and packed into the column by the homogenate method.

[0016] (3) adopting the sulfuric acid of 3mmol / L as eluent, flow velocity is 1ml / min, adopts the suppressed conductometric detector to alkali metal, ammonium

[0017] (4) and alkaline earth metal cations were detected.

[0018] (5) Ion chromatographic columns made of pyromellitic anhydride bonded with different concentr...

Embodiment 2

[0020] (1) Use 8 μm styrene-divinylbenzene polymer beads, wash and dry.

[0021] (2) Mix the base ball and a certain amount of vinylphosphonic acid in a nitrobenzene environment, use anhydrous aluminum chloride as a catalyst, and stabilize the temperature at 50 degrees Celsius, react for 6 hours, take out the bonded microspheres and wash them with ethanol , and packed into the column by the homogenate method.

[0022] (3) The cation was determined by the method of Example 1 (3), and the result was consistent with 1 (4).

Embodiment 3

[0024] (1) Use 8 μm styrene-divinylbenzene polymer beads, wash and dry.

[0025] (2) Mix base balls and a certain amount of maleic anhydride in a nitrobenzene environment, use anhydrous zinc chloride as a catalyst, stabilize the temperature at 50 degrees Celsius, react for 6 hours, take out the bonded microspheres and wash them with ethanol clean, and packed into the column by the homogenization method.

[0026] (3) The cation was determined by the method of Example 1 (3), and the result was consistent with 1 (4).

[0027] (4) The exchange capacity of the cation chromatographic column made by this method is suitable, and the one-time injection separation of alkali metal and alkaline earth metal ions can be fully realized.

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Abstract

The present invention provides a preparation method of cationic chromatographic column. It is characterized by that said method uses styrene-divinylbenzene filler as base body, and adopts grafting chemical process to make the weakly cationic ion-exchange function groups of carboxylic group and phosphonic group be bonded no the high-molecular base body so as to obtain the invented high-effective cationic chromatographic column which can be used for separating cations of alkali metal, ammonium and alkali earth metal, etc. by means of one-step process.

Description

technical field [0001] The invention relates to a cation chromatographic column and a preparation method thereof, in particular to a preparation method of a grafted cation chromatographic column. Background technique [0002] Ion chromatography is currently the fastest-growing branch in the field of chromatography. It is currently the most effective analytical method for cation analysis and is widely used in many fields such as environmental protection, electric power, and semiconductors. As the heart of ion chromatography, the ion chromatography column has many different preparation methods. Although the ion chromatography column prepared by coating functional groups on the surface of silica gel has the advantages of not easy to deform and uniform ball diameter, it is not resistant to acid and alkali. Great restrictions on its development. The ion chromatography column produced by polymer-based spherical surface agglomeration method has stable column capacity and excellent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
Inventor 朱岩叶明立
Owner ZHEJIANG UNIV
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