Method for Determination of Organophosphorus Pesticide Residues in Luo Han Guo by Gas-Mass Spectrometry
A technology of organophosphorus pesticides and Luo Han Guo, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of no public detection of organophosphorus pesticide residues, etc., and achieve the effect of strong practical value, good reproducibility, and fast detection speed
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[0044] The present invention will be further described below in conjunction with specific examples, but the protection scope of the present invention is not limited to the following examples.
[0045] (1) Sample pretreatment: prepare the extraction solvent according to the volume ratio of petroleum ether and acetone 2:1, weigh 2 g of Luo Han Guo coarse powder, put it in a 100 mL Erlenmeyer flask, add the extraction solvent, and put it in an ice bath for ultrasonic extraction for 10 min , filtered, the filter residue and filter were washed with 10 mL of extraction solvent, the combined filtrate was placed in a 50 mL beaker, 0.2 g of activated carbon was added, and left for 5 min, shaken several times to decolorize until the color became lighter, filtered, and extracted with extraction solvent Wash the filter residue and filter, combine the filtrate, concentrate to nearly dryness, dilute to 10 mL with acetone and dissolve, and obtain the extract for later use;
[0046] (2) Prepa...
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