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Quick detection method and pretreatment method for residual quantity of various pesticides in tomato sauce

A technology for pesticide residues and ketchup, which is used in measuring devices, instruments, scientific instruments, etc., can solve the problems of long processing time and few detection types, and achieve the effect of reducing detection costs, reducing damage, and simplifying time consumption.

Inactive Publication Date: 2017-01-04
COFCO GROUP +1
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Problems solved by technology

[0005] The object of the invention is to overcome the shortcomings of existing pesticide residue detection methods, such as few detection types and long processing time, and develop a method for detecting multiple pesticide residues in a low-cost, high coverage and efficient tomato sauce; meanwhile, The present invention extracts, purifies, and concentrates tomato paste samples by using a unified sample pretreatment method, and then adopts different instrument detection methods to realize simple and convenient rapid detection of various pesticide residues in tomato paste

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  • Quick detection method and pretreatment method for residual quantity of various pesticides in tomato sauce
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  • Quick detection method and pretreatment method for residual quantity of various pesticides in tomato sauce

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Embodiment Construction

[0028] like figure 1 As shown, the present invention adopts a unified sample pretreatment method to extract, purify and concentrate the tomato paste sample, and then use different instrument detection methods to realize the rapid detection of various pesticide residues in tomato paste.

[0029] In the pretreatment method of the present invention, the acetonitrile added in step (1) optionally contains 1% acetic acid, and the addition of acetic acid can further stabilize the alkali-labile pesticides in the sample, thereby improving the detection accuracy.

[0030] In step (3), when obtaining the liquid sample to be tested for GC-FPD analysis, the sample is nearly dried with nitrogen. The "nearly dry" means that it is not necessary to completely dry the sample, but the nitrogen blowing is stopped when there is basically no visible liquid solvent in the sample, and acetonitrile can be further added to redissolve after a short period of time. Specifically, "nearly dry" may mean th...

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Abstract

The invention relates to a pretreatment method for quickly detecting residual quantity of various pesticides in tomato sauce. The method comprises the following steps: extracting, purifying, filtering and the like. The invention further relates to a method for quickly detecting the residual quantity of the various pesticides in the tomato sauce by using the pretreatment method and then using different instrument detecting methods.

Description

technical field [0001] The present invention relates to a pretreatment method for rapid detection of various pesticide residues in tomato paste, and also relates to the use of the pretreatment method, using gas chromatography-flame photometric detector, gas chromatography-electron capture detector and liquid A phase chromatography-tandem quadrupole mass spectrometer is a rapid detection method for analyzing various pesticide residues in tomato paste, which belongs to the field of food safety detection. Background technique [0002] A variety of pesticides are used in the tomato planting process. These pesticides are stable and not easy to degrade. During the tomato processing process, they will remain in the final product - tomato paste, posing a risk of pesticide residues. At present, there are hundreds of pesticides used in China, and hundreds of pesticides may also be used in the tomato planting process. How to quickly detect multiple pesticides in tomato paste across typ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/88G01N30/06
Inventor 陈士恒史晓梅吕岳文刘超章晴高丁孙屏杨永坛
Owner COFCO GROUP
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