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

A technology for organophosphorus pesticides and residues, which is applied in the measurement of color/spectral characteristics, etc., can solve the problems of increasing processes and man-hours, complicated operation processes, and increased production costs, and achieves convenient and rapid detection, good repeatability, and improved work efficiency. Effect

Inactive Publication Date: 2011-01-12
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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
Comparison scheme
Effect test

Embodiment 1

[0065] In step 1.1), pentafluorotetraphenyl zinc porphyrin is used as the photosensitizer, acetonitrile organic solvent is used as the fixed solvent, and the volume ratio of pentafluorotetraphenyl zinc porphyrin: acetonitrile organic solvent is 1: 10 6 Add the pentafluorotetraphenyl zinc porphyrin to acetonitrile, stir to dissolve, and prepare the pentafluorotetraphenyl zinc porphyrin with a concentration of 10 -6 The mol / L pentafluorotetraphenyl zinc porphyrin solution should be placed in the refrigerator and stored at 3°C ​​in the dark for later use.

[0066] 1.2) In step, the volume ratio of the known organophosphorus pesticide solution: the volume ratio of the fixed solvent is 1:10 4 The organophosphorus pesticide solutions are prepared separately; the organophosphorus pesticides are dimethoate (40% EC), dimethoate (40% EC), dichlorvos (80% EC), chlorpyrifos (40% EC), hydrocarbophos ( 40% EC), phorate (40% EC), etc.

[0067] In step 1.3), the volume of pentafluorotetraphenyl zi...

Embodiment 2

[0071] In step 1.1), zinc porphyrin is used as the photosensitizer, acetone organic solvent is used as the fixed solvent, and the volume ratio of zinc porphyrin substance: acetone organic solvent is 1:10 5 The zinc porphyrin was added to the acetone organic solvent, and after stirring and dissolving, the mass concentration was 10 -5 The mol / L zinc porphyrin solution is placed in a refrigerator and stored at 4°C and protected from light for later use.

[0072] In step 1.2), five known organophosphorus pesticide solutions (i.e. dimethoate (40% EC), dimethoate (40% EC), dichlorvos (80% EC), chlorpyrifos (40% EC), hydrocarbophos (40% EC) volume: The volume ratio of acetone is 1:10 5 The proportion of five kinds of known organophosphorus pesticide solutions were prepared.

[0073] In step 1.3), the volume of zinc porphyrin solution: the volume ratio of five known organophosphorus pesticide solutions prepared in step 1.2) is (1~10 6 ):1, configure sample porphyrin detection solutions with...

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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 spectrogramof 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 the 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 large-scale use of organophosphorus pesticides has caused harm to people's health and the external ecological environment. Pesticides remaining in the environment will not only affect the various functions of the human body, but also pose potential harm to the human nervous system and other system functions, and even reduce the body’s immune function, showing "three causes" effects (carcinogenic, Teratogenic, mutagenic). Pesticide residues have become one of the major pollution sources in the world today. Therefore, the realization of si...

Claims

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Application Information

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Patent Type & Authority Patents(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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