Evaluation of CP Sil 8 CB film thickness for the capillary GC determination of methyl mercury |
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Authors: | Jens H. Petersen Iver Drabaek |
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Affiliation: | (1) National Food Agency of Denmark, Mørkh/j Bygade 19, DK-2860 Søborg, Denmark;(2) Danish Technological Institute, P.O. Box 141, DK-2630 Gregersensvej, Taastrup, Denmark |
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Abstract: | Different commercially available CP-Sil 8 CB capillary columns have been tested with a mixed standard containing methyl mercury chloride, ethyl mercury chloride and a stable nonpolar chlorinated hydrocarbon. The aim of the study was to see whether the columns tested could be used without special pretreatments and precautions for the determination of organo-mercury compounds. The GC conditions in these determinations where similar to those conditions used for the determination of chlorinated pesticides. The best peak shapes where found using a normal packed column injector, modified with a commercially available insert for on-column injections on wide bore columns, and a 5.35 m thick stationary phase. It was concluded that this CP Sil 8 CB column gave good results although minor interactions between the organomercury compounds and the column could be seen. |
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Keywords: | methyl mercury ethyl mercury organo-mercury compounds capillary GC analysis film thickness |
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