Method for detecting pyrethroid pesticide residue amount in smoke by cigarette filter

Abstract

The invention discloses a method for detecting pyrethroid pesticide residue amount in smoke by a cigarette filter, belonging to the technical field of tobacco chemical analysis. The method comprises the following steps: placing a sucked filter tip at standard smoking condition into a 150ml of bottle with a tapered plug; adding 100mL of mixed solvent of ethyl acetate and cyclohexane with the volume ratio of 1:1; placing the bottle on an ultrasonic wave generator for extraction for 30min; concentrating to be 0.5mL on a rotary evaporator after drying by anhydrous sodium sulfate; setting the volume to be 2mL by normal hexane to be purified; placing a small graphite carbon black column on a solid phase extractor; activating by 3mL of acetone and 3mL of normal hexane in sequence; transforming the sample test solution to be purified into the small graphite carbon black column; eluting for two times by utilizing 2.5mL of mixed solvent of acetone and normal hexane, wherein the speed does not exceed 5.0mL/min; evaporating and concentrating eluent; setting the volume to be 1.5mL by acetone and normal hexane with the volume ratio of 2:8; and analyzing on GC-ECD. The method of the invention is simple and accurate, and can effectively determine pyrethroid pesticide residue amount in smoke by the cigarette filter.

Description

Technical field: [0001] The invention relates to a method for detecting the interception amount of pyrethroid pesticides in smoke by a cigarette filter tip, belonging to the technical field of tobacco chemical analysis. Background technique: [0002] Pyrethroid pesticides are a class of broad-spectrum insecticides, which have the advantages of high efficiency and low toxicity, and have been widely used in the control of tobacco pests in recent years. However, the extensive, large-scale and long-term use of pesticides has caused the increase of pesticide residues in tobacco leaves, the enhancement of drug resistance of diseases and insect pests, and the resurgence, that is, the "three R" (Residue, Resistance, Resurgence) problem. Among them, the problem of pesticide residues in tobacco leaves has increasingly attracted the attention of the tobacco industry and the whole society. Tobacco, as a special consumer product, enters the human body through the combustion of cigarette...

AI Technical Summary

Problems solved by technology

At present, the most used sample pretreatment technology is to pack different carriers in the chromatographic column to purify the sample. Although this method has strong selectivity, there are cumbersome and time-consuming operations, high solvent consumption, and large sample consumption during use. ,...

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