Device and method for measuring cadmium in water through liquid chromatogram flow injection chemiluminescence

A chemiluminescence method and flow injection technology, applied in the field of environmental chemical monitoring, can solve the problems of long separation time, low extraction efficiency, complicated analysis process, etc.

Active Publication Date: 2014-06-04
OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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Problems solved by technology

[0005] The invention provides a device and method for measuring cadmium in water by liquid chromatography flow injection chemiluminescence method, which can solve the existing problems of inability to work on site, long analysis duration, complicated analysis process, harsh conditions and high energy consumption. , especially secondary pollution and other issues
Through the innovative design of the extraction chamber and chromatographic packed column, the problems of low extraction efficiency, uneven layering, large amount of organic solvent used and secondary pollution in existing extraction methods and devices are solved; the chromatographic packed column currently used is solved It has the defects of low separation ability, long separation time and large dead volume, and realizes efficient extraction and fast separation Flow injection chemiluminescence method for measuring cadmium in water

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  • Device and method for measuring cadmium in water through liquid chromatogram flow injection chemiluminescence
  • Device and method for measuring cadmium in water through liquid chromatogram flow injection chemiluminescence
  • Device and method for measuring cadmium in water through liquid chromatogram flow injection chemiluminescence

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Embodiment Construction

[0051] see image 3 , the structure of the extraction chamber 7 is divided into extraction upper layer, extraction turbulence zone 5-4, extraction lower layer and air chamber 5-7 from top to bottom, the extraction upper layer and extraction lower layer are cylindrical, and the extraction turbulence zone 5-4 is formed by an inverted The truncated circular shape and the true truncated circular shape are oppositely formed, and the air chamber 5-7 is conical. The upper separation of the extraction is provided with 4 upper partitions 5-3, the upper partitions 5-3 are made of 75% methylpolysiloxane and 25% polyethylene glycol, and the lower extraction There are 4 lower partitions 5-5 at intervals, and the lower partitions 5-5 are made of 25% methylpolysiloxane and 75% polyethylene glycol, and the air chamber 5-7 and Nitrogen cylinder 6 is connected, see figure 2 A stainless steel microporous plate 5-6 is arranged between the extraction lower layer and the air chamber 5-7, and a m...

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Abstract

The invention provides a device and a method for measuring a cadmium element in water through liquid chromatogram flow injection chemiluminescence. According to the method, a complex is formed based on cadmium in the water and methyl glycol biacrylate, chemiluminescence is generated by the complex and ethyl acetoacetate in a cyclohexane organic phase system, a linear relationship exists between the chemiluminescence intensity and the concentration of the cadmium element in the water, and a method for measuring the cadmium in the water through the liquid chromatogram flow injection chemiluminescence is established by utilizing a liquid chromatographic separation flow injection technology. The method for measuring the cadmium element in the water has the characteristics of field measurement, rapidness, simplicity and sensitivity.

Description

technical field [0001] The invention relates to the technical field of environmental chemical monitoring, in particular to a method for measuring cadmium elements in water bodies. Background technique [0002] Cadmium in water is a very important problem facing water environmental pollution in recent years. In order to scientifically evaluate and control the pollution degree of cadmium in water, it is necessary to analyze the content, valence and form of cadmium in water. At present, the methods for determining cadmium in water mainly include: color spectrophotometry, atomic absorption spectrometry, atomic emission spectrometry, ICP-MS and electrochemical analysis. The method lasts for a long time, the analysis process is complicated, the conditions are harsh, the reagent consumption is large, and some require the use of toxic organic extractants and color reagents, resulting in secondary pollution. Most of the methods require expensive and large-scale instruments. In addi...

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Application Information

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IPC IPC(8): G01N30/88
Inventor 刘岩马然吴宁李洋张述伟吴丙伟张颖颖褚东志曹煊王茜石小梅张颖刘东彦郭翠莲范萍萍吕靖王昭玉张国华任国兴曹璐张婷王洪亮陈朝贵杨小满程岩高杨侯广利
Owner OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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