Device and method for measuring total chromium in water by enrichment and elution flow injection chemiluminescence
A chemiluminescence, flow injection technology, applied in chemiluminescence/bioluminescence, analysis by chemical reaction of materials, etc., can solve the problems of low chemiluminescence detection efficiency, secondary pollution, harsh conditions, etc. Reflective efficiency, strong adsorption capacity, large surface area
Active Publication Date: 2016-01-20
OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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[0005] The present invention provides a device and method for measuring total chromium in water body by enrichment and elution 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 energy consumption. Large, especially secondary pollution and other problems
Through the innovative design of the enrichment-elution chamber and the chemiluminescence detection chamber, the problems of low enrichment efficiency, poor system selectivity, easy introduction of interference, large amount of organic solvent usage, and secondary pollution in existing enrichment methods are solved. Problems; Solve the shortcomings of the currently used chemiluminescence detection chamber due to the flow-through structure, short sample residence time, and low efficiency of chemical reflection detection, and realize high-efficiency enrichment-elution and rapid flow injection chemiluminescence to measure total chromium in water
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[0052] see image 3 , the enrichment-elution chamber 10 comprises an upper enrichment-elution chamber 10-5 and a lower gas chamber 10-9, the upper enrichment-elution chamber 10-5 is cylindrical, and the lower gas chamber The chamber is 10-9 conical. The upper part of the enrichment-elution chamber 10-5 is provided with a water sample inlet 10-1 and an eluent inlet 10-11, and the lower part of the enrichment-elution chamber 10-5 is provided with an eluent outlet 10-6 and The enrichment solution discharge port 10-7, and the enrichment-elution chamber 10-5 are separated by five sieve plates 10-3, and the sieve plates 10-3 are made of polytetrafluoroethylene. Except for the uppermost sieve plate 10-3, the remaining sieve plates 10-3 are filled with granular magnetic nanomaterials 10-4. Dimethicone coating, using sodium humate to load and modify the magnetic nanomaterial of polydimethylsiloxane coating. A microporous electromagnet 10-8 is provided between the enrichment-elution ...
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The invention provides a device and a method for measuring total chromium of a water body by a flow-injection chemiluminiscence method by enriching and eluting. The method comprises the following steps: enriching total chromium based on a magnetic nano material, then eluting, forming a complex by eluted total chromium and dimethyl dimethoxy silicane, and oxidizing the complex and peroxided oxalate so as to generate chemiluminiscence, wherein the chemiluminiscence intensity has linear relationship with the concentration of the total chromium in the water body. A method for measuring total chromium of the water body by the flow-injection chemiluminiscence method by enriching and eluting of the magnetic nano material is established by utilizing an enriching-eluting-complexing-chemiluminiscence technique. The characteristics of rapidity, simplicity, convenience and high accuracy can be achieved in the determination of total chromium in the water body.
Description
technical field [0001] The invention relates to the technical field of environmental chemical monitoring, in particular to a method for measuring heavy metals in water. Background technique [0002] Chromium is one of the important contents in water environment monitoring. At present, the commonly used methods for determining total chromium in water include diphenylcarbazide spectrophotometry and flameless atomic absorption spectrometry. Some methods also introduce harmful organic solvents to varying degrees, resulting in a large amount of waste of reagents and secondary pollution. At the same time, most methods require expensive and large-scale instruments. In addition, the method adopts the mode of on-site sampling and laboratory analysis, that is, on-site and real-time measurement cannot be realized, and other interfering substances are easily introduced during sample transportation and processing, which affects the accuracy of analysis. sex. Therefore, it is impossibl...
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IPC IPC(8): G01N21/76
Inventor 刘岩褚东志李洋吴丙伟张述伟吴宁马然张颖颖曹煊刘东彦郭翠莲张颖王茜石小梅王昭玉范萍萍张国华吕靖张婷曹璐任国兴王洪亮陈朝贵杨小满高杨程岩侯广利
Owner OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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