ISSN:
1612-1112
Keywords:
Supercritical fluid chromatography
;
Packed columns
;
Aqueous samples
;
On-line extraction
;
Pesticides
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Summary Nearly 100 pesticides were eluted with good peak shapes from silica columns using methanol/carbon dioxide mobile phases. The pesticides included organophosphorus, organochlorine, phenylurea, sulfonylurea, triazine, carbamate and phenoxyacid pesticides, demonstrating the wide applicability of SFC to pesticide analysis. A subset of 31 pesticides were on-line extracted from large water samples, typically 10 to 20 ml, but up to 100 ml. The extracts were separated on a 1.6 meter long column packed with 5 μm particles, then detected simultaneously with a photodiode array UV detector plus an electron capture (ECD) and a nitrogen-phosphorus (NPD) detector. Recovery, reproducibility, linearity, response factors and detection limits were determined. Detection limits from a 5 ml water sample were in the range of 100 to 500 parts per trillion (1/1012). Larger samples appear capable of lowering these limits to below 10 ppt.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02318624
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