Newton J M, Rothman B S, Walker F A
Food and Drug Administration, San Francisco, CA 94102.
J Assoc Off Anal Chem. 1991 Nov-Dec;74(6):986-90.
A semiquantitative capillary column gas chromatographic method is described for the determination of diesel fuel contamination in various canned seafood products. The diesel contaminants are separated from the fish sample by steam distillation, with little carry-over of interfering intrinsic materials such as fish oils. The diesel fuel is extracted from the condensate with n-hexane, and the extract is analyzed on an SPB-1 fused silica capillary column. The efficiency of recovery of diesel fuel added to canned seafood at levels of 40-400 ppt ranged from 72 to 102%. With the additional step of concentrating the hexane extract, the sensitivity of this procedure may be increased at least 10-fold. This procedure can detect the differences among diesel fuel grades No. 1, 2, and 5, and variations within diesel grade No. 2, and thus may be useful in determining the type of petroleum contaminants present in various canned fish products.
本文描述了一种半定量毛细管柱气相色谱法，用于测定各种罐装海产品中柴油燃料的污染情况。通过水蒸气蒸馏将柴油污染物与鱼样品分离，鱼油等干扰性固有物质的残留很少。用正己烷从冷凝物中萃取柴油燃料，萃取物在SPB-1熔融石英毛细管柱上进行分析。添加到罐装海产品中浓度为40 - 400 ppt的柴油燃料的回收率在72%至102%之间。通过增加正己烷萃取物浓缩这一步骤，该方法的灵敏度可提高至少10倍。该方法能够检测1号、2号和5号柴油等级之间的差异以及2号柴油等级内的变化，因此可用于确定各种罐装鱼类产品中存在的石油污染物类型。
