用于食品中某些有机氮除草剂和杀菌剂气液色谱筛选的电解电导率检测评估。
Evaluation of electrolytic conductivity detection for gas-liquid chromatographic screening of some organonitrogen herbicides and fungicides in foods.
作者信息
Lawrence J F, McLeod H A
出版信息
J Assoc Off Anal Chem. 1977 Jul;60(4):979-81.
Electrolytic conductivity detection for the gas-liquid chromatographic (GLC) screening of 15 organonitrogen herbicides and fungicides was investigated. Spiked samples of crop material was extracted with acetone and the filtered sample extracts were partitioned with methylene chloride-petroleum ether (1+1) followed by second and third extractions with methylene chloride. The combined organic extracts were evaporated to dryness and the residues were dissolved in hexane for cleanup on a 2% deactivated Florisil column. The pesticide fractions were determined directly by GLC. All pesticides could be detected at 0.1 ppm in the foods studied.
研究了用于15种有机氮除草剂和杀菌剂气液色谱（GLC）筛选的电解电导率检测方法。用丙酮提取作物材料的加标样品，过滤后的样品提取物用二氯甲烷 - 石油醚（1 + 1）进行分配，然后用二氯甲烷进行第二次和第三次萃取。合并的有机提取物蒸发至干，残留物溶于己烷，在2% 去活化弗罗里硅土柱上进行净化。农药馏分直接通过GLC测定。在所研究的食品中，所有农药均可在0.1 ppm的浓度下被检测到。
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