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A method and device for separating antimony forms in the field

An on-site and field technology, applied in the field of analytical geochemical on-site separation, can solve problems such as cumbersome elution process, and achieve the effects of good separation performance, convenient device portability and strong reusability.

Active Publication Date: 2021-08-27
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional pretreatment method of solid phase extraction is to adsorb the target substance on the column and then elute it with a specific eluent, the elution process is cumbersome

Method used

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  • A method and device for separating antimony forms in the field
  • A method and device for separating antimony forms in the field
  • A method and device for separating antimony forms in the field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Please refer to the attached figure 1 , the embodiment of the present invention provides a device for separating antimony forms in the field, including a syringe 1, a filter head 2, an adapter 3, a solid phase extraction separation column 4, and a receiving tube 5 arranged sequentially from top to bottom; The needle end is connected to the inlet end of the filter head 2, the outlet end of the filter head 2 is connected to the inlet end of the adapter 3, the outlet end of the adapter 3 is connected to the inlet end of the solid phase extraction separation column 4, and the receiving tube 5 is located in the solid phase Below the outlet end of the extraction separation column 4. Wherein, the capacity of the syringe 1 is 10mL~50mL, the capacity of the receiving tube 5 is 1mL~10mL; the aperture of the filter membrane in the filter head 2 is 0.45 μm or 0.22 μm; The capacity is 1mL~10mL.

[0031] The device of the invention is easy to carry, can be connected and combined ac...

Embodiment 2

[0039] Carry out a kind of field scene separation antimony form according to the method for embodiment one of the present invention, comprise the following steps:

[0040] (1) The solid phase extraction separation column 4 with a column capacity of 3 mL is pretreated for 6 hours with a sulfuric acid solution having a concentration of 10% (v / v);

[0041] (2) After the pretreatment is complete, use deionized water to clean the solid-phase extraction separation column 4 until the filler is neutral;

[0042](3) Get 2mL of surface water and add 0.1mol / L hydrochloric acid solution dropwise to adjust the pH value to 6, take the sample after adjusting the pH value and put it in the syringe 1 of 10mL in right amount, and the syringe 1 passes through the filter head 2 of 0.45 μm, turns The connector 3 is connected to the solid phase extraction separation column 4, the sample is separated by the solid phase extraction separation column 4, and the effluent is collected in the receiving tu...

Embodiment 3

[0045] Carry out a kind of field scene separation antimony form according to the method for embodiment one of the present invention, comprise the following steps:

[0046] (1) Pretreating the solid-phase extraction separation column 4 with a column capacity of 6 mL with a sulfuric acid solution having a concentration of 5% (v / v) for 12 hours;

[0047] (2) After the pretreatment is complete, use deionized water to clean the solid-phase extraction separation column 4 until the filler is neutral;

[0048] (3) Take 3 mL of groundwater and add 0.1 mol / L sodium hydroxide solution dropwise to adjust the pH value to 8. Take an appropriate amount of the sample after adjusting the pH value and put it in a 20 mL syringe 1, and the syringe 1 passes through a 0.22 μm filter head 2, The adapter 3 is connected to the solid-phase extraction separation column 4, the sample is separated by the solid-phase extraction separation column 4, and the effluent is collected in the receiving tube 5 of 1...

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Abstract

The invention discloses a method and device for separating antimony forms in the field. The sample pretreatment operation process is simple, without introducing toxic and harmful reagents and complicated elution procedures, and a good separation effect can be achieved by directly passing through the column: at the pH of the sample In the range of 5 to 9, the adsorption rate of Sb(V) by the solid phase extraction separation column is lower than 10%, and the adsorption rate of Sb(III) is higher than 90%. The pretreatment process is effective while ensuring fast and efficient separation. The background is controlled, which solves the problem of low detection accuracy caused by sample contamination and shape change during transportation; the method has high separation efficiency for different forms of antimony, good sorting performance, strong anti-interference ability, and is suitable for many types of samples. It has a wide range of applications, especially suitable for micro-trace samples; at the same time, the device has a simple structure and is suitable for carrying in the field for on-site separation.

Description

technical field [0001] The invention belongs to the field of on-site separation methods for analyzing geochemistry, and in particular relates to a method and a device for field-site separation of antimony forms by using a solid-phase extraction separation column. Background technique [0002] Antimony is ubiquitous in nature, has a wide range of sources, and has various forms. It mainly exists in inorganic and organic forms, and the content of inorganic antimony is much higher than that of organic antimony. Inorganic antimony usually appears in the form of trivalent and pentavalent mixtures. When the pH is in the range of 3 to 11, pentavalent antimony mainly exists in the form of anionic compounds; while trivalent antimony mainly exists in the form of neutral molecules. is relatively unstable. Different forms of antimony have significant differences in physical and chemical properties, biological activity and toxicity levels. Generally, the toxicity of trivalent antimony is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/34
CPCG01N1/34
Inventor 郭伟戴鑫胡圣虹
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)