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Method for detecting organophosphorus pesticide residual quantity and liquid porphyrin optical detection apparatus

A technology of organophosphorus pesticides and residues, applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of increasing procedures and working hours, complicated operation process, increasing production costs, etc., achieve convenient and fast detection, good repeatability, and improve work efficiency Effect

Inactive Publication Date: 2010-05-19
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of this system are: 1. Metalloporphyrins need to be made into gas-sensitive reagent blocks first, then these reagent blocks are fixed on the glass substrate, and then the organic protective layer and the glass substrate are glued to make a gas-sensitive array strip. Therefore, the operation process of making the array is too complicated, takes a long time, and increases the process and man-hours; 2. When the metalloporphyrin is made into a gas-sensitive array strip, this operation process uses many materials for immobilizing the metalloporphyrin , which greatly increases the production cost; third, the detected gas can only contact the surface of the metalloporphyrin gas-sensing array strip, which limits the full reaction of the detected gas and the metalloporphyrin to a certain extent; fourth, the device uses micro Pumps, gas handling chambers, increase production costs

Method used

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  • Method for detecting organophosphorus pesticide residual quantity and liquid porphyrin optical detection apparatus
  • Method for detecting organophosphorus pesticide residual quantity and liquid porphyrin optical detection apparatus
  • Method for detecting organophosphorus pesticide residual quantity and liquid porphyrin optical detection apparatus

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Experimental program
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Effect test

Embodiment 1

[0065] 1.1) In the step, take pentafluorotetraphenyl zinc porphyrin as photosensitizer, take acetonitrile organic solvent as fixed solvent, press the amount of substance of pentafluorotetraphenyl zinc porphyrin: the volume ratio of acetonitrile organic solvent is 1: 10 6 The ratio of pentafluorotetraphenyl zinc porphyrin is added in acetonitrile, and after stirring and dissolving, the concentration of the pentafluorotetraphenyl zinc porphyrin substance prepared is 10 -6 mol / L pentafluorotetraphenylzinc porphyrin solution, placed in a refrigerator, stored in the dark at 3°C, and set aside.

[0066] 1.2) In the step, according to the volume of known organophosphorus pesticide solution: the volume ratio of fixed solvent is 1: 10 4The ratio of organophosphorus pesticide solution is configured respectively; Organophosphorus pesticide is omethoate (40% EC), dimethoate (40% EC), dichlorvos (80% EC), chlorpyrifos (40% EC), isocarbophos ( 40% emulsifiable concentrate), phorate (40% e...

Embodiment 2

[0071] 1.1) in the step, take zinc porphyrin as photosensitizer, take acetone organic solvent as fixed solvent, by the amount of substance of zinc porphyrin: the volume ratio of acetone organic solvent is 1: 10 5 The ratio of zinc porphyrin is added in the acetone organic solvent, and after stirring and dissolving, a mass concentration of 10 is prepared. -5 mol / L zinc porphyrin solution, placed in the refrigerator, protected from light at 4°C, and set aside.

[0072] 1.2) In the step, five kinds of known organophosphorus pesticide solutions (ie omethoate (40% EC), dimethoate (40% EC), dichlorvos (80% EC), chlorpyrifos (40% EC), isocarbophos The volume of (40% emulsifiable concentrate): the volume ratio of acetone is 1:10 5 The proportion of five kinds of known organophosphorus pesticide solutions were prepared respectively.

[0073] 1.3) In the step, the volume of the zinc porphyrin solution: the volume ratio of five known organophosphorus pesticide solutions prepared in the...

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Abstract

The invention discloses a method for detecting organophosphorus pesticide residual quantity, comprising the following steps of: (1) measuring a specimen spectrogram of a known organophosphorus pesticide; (2) measuring a spectrogram of an organophosphorus pesticide to be measured; (3) obtaining the category and the concentration of the organophosphorus pesticide through contrasting the spectrogram of the organophosphorus pesticide to be measured and the specimen spectrogram of the known organophosphorus pesticide. Meanwhile, the invention also discloses a liquid porphyrin optical detection apparatus for realizing the method. The detection method and the detection device have convenient and simple operation, simple and rapid detection, low cost, energy consumption and resource saving, and can qualitatively and quantitatively detect the category and the concentration of the organophosphorus pesticide residual quantity.

Description

technical field [0001] The invention relates to the technical field of organophosphorus pesticide residue detection, in particular to a method for detecting organophosphorus pesticide residue and a liquid porphyrin optical detection device. Background technique [0002] Since the 1980s, organophosphorus pesticides have become the most widely used pesticides in agricultural and forestry production and postharvest preservation. The long-term use of organophosphorus pesticides in large quantities has caused harm to people's health and the external ecological environment. Pesticides remaining in the environment will not only affect various functions of the human body, but also pose potential hazards to the nervous system and other system functional structures of the human body, and even reduce the immune function of the body, showing "three-caused" effects (carcinogenic, carcinogenic, teratogenic, mutagenic). Pesticide residues have become one of the main sources of pollution ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/25G01N21/33
Inventor 侯长军傅深娜霍丹群法焕宝罗小刚张明黄舜
Owner CHONGQING UNIV
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