Comparison of gas and liquid chromatography for analysing polar pesticides in water samples
Abstract This review describes the applications of gas chromatography (GC) and liquid chromatography (LC) in the analysis of selected groups of pesticides in water. The attention is focussed on the most popular (in terms of amounts produced and applied) pesticide classes, i.e., carbamates, phenylureas, triazines, phenoxy acetic acid derivatives and chlorinated phenols. The use of GC and LC for the analysis of these compounds in water samples in the past and at present is reviewed separately for each group. Sample concentration and detection techniques are discussed in relation to their influence on the performance of the particular separation technique. Special attention is given to mass spectrometry (MS) because it is the most intensively developed detection technique in environmental analysis. The potential of another novel approach - large volume injections into the GC - is discussed separately. Methods using GC or LC coupled to an appropriate detector and using suitable sample handling procedures provide detection limits typically in the range of 0.001–1 ppb. At these levels, target or unknown compounds can be determined/identified by means of their retention and spectral characteristics. Principally, most of the analytes can be determined by both techniques, however, GC methods, when applicable, still have the advantages of great separation efficiency, high speed of analysis and the availability of a wide range of highly sensitive detectors; on the other hand, LC is often a method of choice when polar, non-volatile or thermolabile compounds are to be analyzed. Neither of the two separation techniques reviewed seems to have an overall priority in environmental analysis of pesticides. They can be considered as complementary.
유료 다운로드의 경우 해당 사이트의 정책에 따라 신규 회원가입, 로그인, 유료 구매 등이 필요할 수 있습니다. 해당 사이트에서 발생하는 귀하의 모든 정보활동은 NDSL의 서비스 정책과 무관합니다.
NDSL에서는 해당 원문을 복사서비스하고 있습니다. 위의 원문복사신청 또는 장바구니 담기를 통하여 원문복사서비스 이용이 가능합니다.
- 이 논문과 함께 출판된 논문 + 더보기