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Effect of organic matter content in the trace analysis of triazines in various types of soils with GC-NPD

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Effect of organic matter content in the trace analysis of triazines in various types of soils with GC-NPD

Content Provider	Springer Nature Link
Author	Molins, C. Hogendoorn, E. A. Heusinkveld, H. A. G. Beuzekom, A. C. Zoonen, P. Baumann, R. A.
Copyright Year	1998
Abstract	Recent work demonstrated that the combination of microwave assisted solvent extraction (MASE) and capillary gas chromatography with selective nitrogen detection (GC-NPD) is a viable approach for the efficient determination of triazine herbicides in soils. However, for soils with a high organic matter content or the injection of more concentrated extracts to obtain lower LOD's the performance of gas chromatographic analysis of uncleaned extracts is hampered. This results in both a decrease of the chromatographic response of analytes and a decrease in the life time of the column due to coextracted matrix substances. The effect of various types of soils on the chromatographic analysis of triazine herbicides was studied. It appeared that for the investigated samples with an organic matter content below 5% processing of uncleaned extracts is possible. Samples with a higher organic matter content required a cleanup step. A rapid procedure on 100 mg silica cartridges has been developed using solvents compatible with the MASE extracts and the instrumental analysis. Beside the testing with different standard soils, about 120 samples of an ongoing monitoring program involving three different types of soil (organic matter content: 3–37%) were analysed. The selected compounds atrazine, desethylatrazine, desisopropyl-atrazine and simazine could be assayed in the various soil types to a level of at least 2 μg kg−1. For soil samples with a high organic matter content (>5%), the rapid cleanup procedure allowed the trace analysis of the triazines and considerably increased the life time of the capillary column. Recoveries at levels from 2 to 50 μg kg−1 ranged from 70 to 100% with RSDs ranging from 5.1 to 9.5%. Confirmation of positive samples was carried out by gas chromatography mass spectrometry.
Starting Page	450
Ending Page	456
Page Count	7
File Format	PDF
ISSN	00095893
Journal	Chromatographia
Volume Number	48
Issue Number	5-6
e-ISSN	16121112
Language	English
Publisher	Vieweg Verlag
Publisher Date	1998-01-01
Publisher Place	Wiesbaden
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Gas chromatography Soil samples Microwave-assisted solvent extraction Nitrogen detection Triazine herbicides Analytical Chemistry Organic Chemistry Pharmacy Biochemistry Plant Sciences Measurement Science, Instrumentation
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Analytical Chemistry Biochemistry Clinical Biochemistry

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