Schenck F J
U.S. Food and Drug Administration, Baltimore District Laboratory, MD 21201, USA.
J AOAC Int. 1996 Sep-Oct;79(5):1215-9.
Six U.S. Food and Drug Administration laboratories participated in an Interlaboratory trial of a solid-phase extraction cleanup method for determination of pesticides in nonfatty seafood products. The participants analyzed control and fortified (about 0.050 ppm lindane, heptachlor epoxide, p,p'-DDE, and endrin) croaker and flounder samples and a sea trout sample containing incurred p,p'-DDE residues. Mean recoveries of the fortified residues from the fish ranged from 89.1 to 107.8%. The within-laboratory coefficients of variation (CVs) ranged from 4.2 to 8.5%, and the among-laboratory CVs ranged from 10.9 to 26.5%. The 6 laboratories reported a mean value of 0.040 ppm p,p'-DDE in a fish sample which contained incurred residues. The same value (0.040 ppm) was obtained by using official methodology. The within-laboratory CVs ranged from 3.5 to 18.3%, and the among-laboratory CV was 17.3%.
美国食品药品监督管理局的六个实验室参与了一项实验室间试验，该试验旨在研究一种用于测定非脂肪类海产品中农药的固相萃取净化方法。参与者分析了对照样品以及添加了林丹、环氧七氯、p,p'-滴滴伊和异狄氏剂（添加量约为0.050 ppm）的黄花鱼、比目鱼样品，还有一个含有实际存在的p,p'-滴滴伊残留的海鳟样品。从鱼类样品中回收的添加残留的平均回收率在89.1%至107.8%之间。实验室内变异系数（CV）在4.2%至8.5%之间，实验室间变异系数在10.9%至26.5%之间。这6个实验室报告称，一个含有实际残留的鱼类样品中p,p'-滴滴伊的平均值为0.040 ppm。采用官方方法也得到了相同的值（0.040 ppm）。实验室内变异系数在3.5%至18.3%之间，实验室间变异系数为17.3%。
