摘要：Simplified methods with SEP-PAK cartridges (Waters Associates) for the determination of diphenyl ether herbicides (CNP, NIP, X-52) in various samples, i. e. water, fish and river sediment, were developed. 1) A water sample was aspirated through SEP-PAK C18 cartridge. Diphenyl ether herbicides were eluted with n-hexane and subjected to GC analysis. The recoveries of CNP, NIP and X-52 were 88.0-98.5%. 2) In the analysis of fish sample, SEP-PAK AgNO3-coated Florisil, prepared originally, was used for cleaning up instead of glass column packed with AgNO3-coated Florisil. Overall recoveries of diphenyl ether herbicides, CNP, NIP and X-52, in fortified samples were 88.0, 81.2 and 93.4%, respectively. Correlation coefficient between the levels of CNP in actual samples by the proposed method with SEP-PAK cartridge and by the other method by using glass column reported previously was 0.992. 3) In the case of river sediment, SEP-PAK Florisil was used to clean up instead of glass column packed with Florisil. Diphenyl ether herbicides in fortified materials were quantitatively detected. And all over recoveries with this cartridge were 94.5-98.4%. As a result, SEP-PAK cartridges were found to be very useful for their simplicity, rapidity, efficiency and reproducibility, as a pretreatment for the analysis of diphenyl ether herbicides in various samples.
