Chelate column for analyzing metal elements and apparatus for samples treatment

A metal element and chelation technology, which is applied in measurement devices, analytical materials, material separation, etc., can solve the problems of complex preparation method of spherical cellulose metal adsorbent, adverse effects of trace metal element analysis operations, and unsatisfactory degree of automation. , to achieve the effect of improving the sample processing speed, simplifying the sample processing process and the structure of the sample processing device, and simplifying the structure

Inactive Publication Date: 2007-02-28
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The problem that iminodiacetic acid macroporous adsorption resin is used as the filler of the concentration column is: (1) when concentrating, magnesium, calcium ions and trace metal elements are adsorbed on the concentration column at the same time, so ammonium acetate solution needs to be used to remove Magnesium, calcium ions, and deionized water to remove other interfering substances can desorb trace metal elements; (2) desorption is difficult, and the desorption solution is 0.05-0.20mol / L HNO 3 solution, which will have adverse effects on the subsequent analysis of trace metal elements
[0007] C 18 The problems that the chemically bonded stationary phase exists as the filling material of the concentrated column are: (1) the sample processing is complicated, at first the trace metal elements in the tested sample are mixed with the complexing agent (the complexing agent is 8-hydroxyquinoline ethanol solution) A reaction occurs to form a metal complex, and then the metal complex is adsorbed on the concentration column, and then the residual sodium chloride, magnesium, calcium and other interfering substances in the concentration column and its related flow paths are removed with the cleaning solution deionized water, and finally With methanol-water-HNO 3 Solution desorption, so that the metal complex adsorbed on the concentration column is separated from the concentration column and enters the low-pressure ion chromatography analysis system of the instrument
(2) The desorption solution contains toxic substances such as methanol, which is harmful to the health of operators
[0008] Although the spherical cellulose metal adsorbent does not have the disadvantages of the above two fillers as the packing of the concentration column, the preparation method of the spherical cellulose metal adsorbent is complicated
[0009] In addition, when testing and analyzing, the combination of the above-mentioned online sample processing device and testing device is not ideal in terms of automation.

Method used

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  • Chelate column for analyzing metal elements and apparatus for samples treatment
  • Chelate column for analyzing metal elements and apparatus for samples treatment
  • Chelate column for analyzing metal elements and apparatus for samples treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: The column packing of the chelating column is processed by non-polar macroporous adsorption resin

[0032] The structure of the chelating column in the present embodiment is as shown in Figure 1, mainly is made of column body, filter membrane 6 and column filler 8; Column body is made by nylon, comprises column tube 7, the plug 5 that is positioned at column tube lumen two ends 1. Pressure tube bolt 2 for applying pressure to the plug, connecting sleeve 3 connecting the column tube and the pressure tube bolt, a conduit 1 is installed in the center hole of the pressure tube bolt 2, and the insertion end of the conduit 1 is provided with a plug attached to the plug. A disc-shaped body, a sealing ring 4 is installed between the disc-shaped body and the end face of the pressure pipe bolt, the conduit 1 communicates with the center hole of the plug 5 to form a liquid input and output channel; the filter membrane 6 is made of nylon silk, and is installed separately ...

Embodiment 2

[0057] Example 2: The column filler of the chelating column is processed by a medium polar macroporous adsorption resin

[0058] The structure of the chelating column in this example is the same as that in Example 1, as shown in FIG. 1 . The difference from Example 1 is the column packing 8 of the chelating column, and the column packing adopts Amberlite XAD-6, Amberlite XAD-7, and Amberlite XAD-8 medium-polar macroporous adsorption resins produced by U.S. Rohm & Hass to prepare the column packing , the process steps are as follows:

[0059] 1. Soaking swelling and purification

[0060] Put the above-mentioned medium-polarity macroporous adsorption resin in a container filled with ethanol and soak it at 25°C for 8 hours to meet the swelling requirements, then wash the soaked and swollen resin with deionized water until it does not contain up to ethanol.

[0061] 2. Use NH 4 OH-HAC-pyridine-(2-azo-4-)resorcinol mixed solution dynamic column processing

[0062] (1) Preparat...

Embodiment 3

[0083] Embodiment 3: the column filler of chelation column is processed by polar macroporous adsorption resin

[0084] The structure of the chelating column in this example is the same as that in Example 1, as shown in FIG. 1 . The difference from Example 1 is the column packing 8 of the chelating column, and the column packing adopts Amberlite XAD-9, Amberlite XAD-10 polar macroporous adsorption resin produced by Rohm & Hass Company of the United States and NKA pole produced by Nankai University in Tianjin, China. The column packing is prepared by using a permanent macroporous adsorption resin, and the process steps are as follows:

[0085] 1. Soaking swelling and purification

[0086] Put the above-mentioned polar macroporous adsorption resin into a container filled with ethanol and soak it at 25°C for 8 hours to meet the swelling requirements, then wash the soaked and swollen resin with deionized water until it does not contain ethanol until.

[0087] 2. Use NH 4 OH-HAC...

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Abstract

The invention relates to a chelate post for analyzing metal element, wherein it is formed by post, filter membranes at the chambers of liquid inlet and outlet of post, and the post stuff filled into the chamber of post; said post stuff is formed by expanded and purified polar, middle polar or non-polar large-hole adsorption resin, via mixing liquid dynamic posting treatment or stable immerge of 0.5mol / L Na2HPO4-1.0-2.0*10-4mol / L pyridine-(2- azo-4-)resorcin; the sample treating device for analyzing metal element has two types which both uses the chelate posts of said post stuff. The invention has simplify the structures of process and device, save chemical agent, improving the treating speed, and avoiding carbinol to hurt people.

Description

[0001] This application is a divisional application, the application number of the original application: 200410040361.5, the application date: August 3, 2004, the title of the invention: a concentration column and a sample processing device for the analysis of trace metal elements. technical field [0002] The invention belongs to a chelating column and a sample processing device for analyzing metal elements, in particular to a chelating column and a sample processing device for analyzing trace metal elements in seawater, estuary water and river water. Background technique [0003] To study the relationship between trace metal elements contained in seawater, estuary water, and river water and ecological environment and human activities, it is necessary to provide necessary data and information for research through the analysis of these trace metal elements. Analytical instruments for trace metal elements in seawater,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/60G01N30/56G01N30/06G01N30/80G01N30/84
Inventor 张新申蒋小萍
Owner SICHUAN UNIV
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