CAJ | 학술논문

建立了一种气相色谱法检测蔬菜中农药残留的测定方法,考察了自制果蔬洗涤盐对蔬菜农药残留的去除率.采用基质固相分散法处理蔬菜样品,弗洛里硅土为固相吸附剂,丙酮/正己烷为洗脱液,各农药回收率在78%～107%,检出限0.003～0.006 mg/kg,定量限0.02～0.03 mg/kg,相对标准偏差小于8%.此方法简单、易操作,可用于评价各类洗涤剂去除农药的效果.为有效去除蔬菜表面残留的农药,以食盐为基本原料,通过复配表面活性剂制备出高效的果蔬洗涤盐,其对有机磷农药敌敌畏、乐果、毒死蜱的去除率在70%～94%,蔬菜中农药残留量均低于国家最高残留限量.
건립료일충기상색보법검측소채중농약잔류적측정방법,고찰료자제과소세조염대소채농약잔류적거제솔.채용기질고상분산법처리소채양품,불락리규토위고상흡부제,병동/정기완위세탈액,각농약회수솔재78%～107%,검출한0.003～0.006 mg/kg,정량한0.02～0.03 mg/kg,상대표준편차소우8%.차방법간단、역조작,가용우평개각류세조제거제농약적효과.위유효거제소채표면잔류적농약,이식염위기본원료,통과복배표면활성제제비출고효적과소세조염,기대유궤린농약활활외、악과、독사비적거제솔재70%～94%,소채중농약잔류량균저우국가최고잔류한량.
A simple method was developed to determine pesticides in vegetables using gas chromatography and study the removal rate of pesticide residues by vegetable and fruit detergents.The method employed matrix solid-phase disperse to prepare samples, using Florisil as dispersant and acetone/n-hexane as eluting solvent.The results showed that the recoveries of organophosphorous pesticides (dichlorvos,dimethoate and chlorpyrifos) in vegetables were in the range of 78% to 107%.The determination limits were 0.003～0.006 mg/kg,the quantification limits were 0.02～0.03 mg/kg,and the relative standard deviation was less than 8%.The method is simple and easy to operate.Therefore, it can be used to evaluate the removal effects of detergents on pesticide residues.In addition, special detergents were prepared using salt as the main material and some surfactants as additives.Experiments showed that the as-prepared salt detergents could remove the pesticides from vegetables effectively.The removal rates of pesticides in vegetables were between 70% and 94% when washed by the salt detergents.The pesticide residues in vegetables were far below the maximum residue level after washed with the as-prepared salt detergents.