Bruns G W, Currie R A
J Assoc Off Anal Chem. 1980 Jan;63(1):56-60.
A number of solvent extraction systems were investigated for their efficiency in removing residues of pentachlorophenol (PCP) and tetrachlorophenol (TCP) from field-contaminated carrots and potatoes. Greatest numerical yields of PCP and TCP, for both carrots (9 and 5 ng/g, respectively) and potatoes (147 and 11 ng/g, respectively), were obtained by Soxhlet extraction with acidified acetone for 44 hr. Within the limits of experimental error, equivalent results could be obtained by using a 20 hr Soxhlet extraction with acidified acetone for carrots, and a 5 min blending with acidified acetone for potatoes. Extracts were reacted with diazoethane to form the ethyl ethers of PCP and TCP, followed by cleanup on a Florisil column. A gas-liquid chromatograph equipped with a 63Ni linearized electron capture detector was used for identification and quantitation.
研究了多种溶剂萃取系统从受田间污染的胡萝卜和土豆中去除五氯苯酚（PCP）和四氯苯酚（TCP）残留的效率。对于胡萝卜（分别为9和5纳克/克）和土豆（分别为147和11纳克/克），通过用酸化丙酮进行索氏提取44小时，获得了PCP和TCP的最高数值产率。在实验误差范围内，对于胡萝卜，使用酸化丙酮进行20小时索氏提取，对于土豆，使用酸化丙酮进行5分钟搅拌，可获得等效结果。提取物与重氮乙烷反应形成PCP和TCP的乙醚，然后在弗罗里硅土柱上进行净化。配备63Ni线性化电子捕获检测器的气液色谱仪用于鉴定和定量。
