Cooke M, Khallef K D, Nickless G, Roberts D J
J Chromatogr. 1979 Oct 19;178(1):183-91. doi: 10.1016/s0021-9673(00)89707-1.
The levels of DDT and related compounds in soil samples from an apple orchard have been determined. Extraction of residues was achieved by cyclic steam extraction and by conventional solvent extraction methods allowing comparison of the two methods. Determination of the organochlorine residues present in the extracts was performed by gas-liquid chromatography-electron-capture detection and by carbon skeleton gas chromatograph-mass spectrometry. Excellent agreement between the two determination techniques was achieved. Prior to application of p,p'-DDT, a value of approximately 0.4 ppm was obtained for Delta DDT in the soil. The major component of this total was DDE. After spraying the apple trees with technical grade, p,p'-DDT, Delta DDT for the soil rose to 0.6 ppm. This increase was due to translocation of p,p'-DDT from the trees.
已测定了苹果园土壤样品中滴滴涕及相关化合物的含量。通过循环蒸汽萃取法和传统溶剂萃取法对残留物进行萃取，以便比较这两种方法。采用气液色谱 - 电子捕获检测法和碳骨架气相色谱 - 质谱法对提取物中存在的有机氯残留物进行测定。两种测定技术之间达成了极佳的一致性。在施用p,p'-滴滴涕之前，土壤中δ-滴滴涕的含量约为0.4 ppm。这一总量的主要成分是滴滴伊。在用工业级p,p'-滴滴涕喷洒苹果树后，土壤中δ-滴滴涕升至0.6 ppm。这种增加是由于p,p'-滴滴涕从树上转移所致。
