Detection device and method for measuring lead in water by flow injection fluorescence quenching method

A detection method and fluorescence quenching technology, applied in the field of environmental chemical monitoring, can solve the problems of inability to work on site, large energy consumption, long analysis duration, etc., and achieve the effects of stable efficiency, high efficiency and improved catalyst activity.

Active Publication Date: 2016-03-30
OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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Problems solved by technology

[0004] The invention provides a detection device and method for measuring lead in water by a flow injection fluorescence quenching method, which can solve the existing problems of the prior art, such as inability to work on site, long analysis duration, complicated analysis process, harsh conditions, and high energy consumption. cause secondary pollution

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  • Detection device and method for measuring lead in water by flow injection fluorescence quenching method
  • Detection device and method for measuring lead in water by flow injection fluorescence quenching method

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Embodiment Construction

[0033] see figure 1 and figure 2 , embodiment: a kind of detection device that the flow injection fluorescence quenching inhibition method measures lead in water body, described detection device comprises catalytic device 15, detection chamber 10, photoelectric detection device 14, control device 11, data processing device 12, transport sample Peristaltic pump 3 and pumps 5, 7, 8 of other liquids, detection chamber 10 is connected with pipelines of samples and other liquids through detection pipelines, carbon nanotubes and temperature control devices are arranged in the said catalytic device 15, said carbon The inner surface of the nanotube is loaded with Ni-Cu-Al metal composite oxide.

[0034] The detection method adopting above-mentioned embodiment detection device comprises the following steps:

[0035](1) Transport the tested sample solution 2 through the sample peristaltic pump 3;

[0036] (2) The sample solution 2 is successively mixed with the acetic acid and sodiu...

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Abstract

The invention provides a device and a method for measuring lead in water by a flow injection fluorescence quenching method. The method is established by using a chelation-enrichment-quenching flow injection technology, wherein lead in a water body and polymethylacrylic acid form a metal chelate under the action of a catalyst, and the generated metal chelate has a quenching function on fluorescent light generated by fluorescein isothiocyanate; meanwhile, a fluorescence signal inhibition degree difference value and a concentration of the lead in the water body have a linear relation. According to the device and the method, a catalysis device with a temperature control function is adopted on the aspect of forming the metal chelate by the lead and the polymethylacrylic acid, and is a carbon nano tube internally loaded with an Ni-Cu-Al metal compound oxide, and the carbon nano tube is used as a carrier, and has a good supporting and dispersing function on a metal active part of the catalyst, so that the activity of the catalyst is greatly improved so that the efficiency of forming the metal chelate by the lead and the polymethylacrylic acid under a proper pH condition is maximal and stable.

Description

technical field [0001] The invention belongs to the technical field of environmental chemical monitoring, specifically based on the fact that the metal chelate produced by lead and polymethacrylic acid in water can quench the fluorescence produced by fluorescein isothiocyanate. A method for measuring lead in water by the difference in fluorescence quenching produced by the solution and the measured water sample. Background technique [0002] Lead is one of the important contents in marine environmental monitoring. At present, the commonly used methods for determining trace lead in seawater include dithizone spectrophotometry, flame atomic absorption spectrometry, flameless atomic absorption spectrometry, hydride generation atomic fluorescence spectrometry, electrochemical stripping voltammetry, etc. These methods The common features are long duration, complex analysis process, harsh conditions, large consumption of reagents, and some methods introduce harmful organic solven...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64
Inventor 刘岩马然赵娜吴宁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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