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J Sep Sci

Title:		"Headspace-solid-phase microextraction preconcentration of phenols, indoles and on-fibre derivatised volatile fatty acids in liquid and gas samples from cow slurries"
Author(s):		Larreta J; Vallejo A; Bilbao U; Usobiaga A; Arana G; Zuloaga O;
Address:		"Kimika Analitikoa Saila, Euskal Herriko Unibertsitatea, Bilbao, Spain. qablaasj@ehu.es"
Journal Title:		J Sep Sci
Year:		2007
Volume:		30
Issue:		14
Page Number:		2293 - 2304
DOI:		10.1002/jssc.200700087
ISSN/ISBN:		1615-9306 (Print) 1615-9306 (Linking)
Abstract:		"Odorous organic compounds from liquid and gas samples of animal wastes were studied by headspace (HS)-solid-phase microextraction (SPME)-GC-MS. 1-Pirenyldiazomethane (PDAM) was adsorbed/absorbed on the SPME fibre in order to obtain the corresponding ester derivatives during the preconcentration step. The SPME fibre was immersed into a PDAM solution. Then, the SPME fibre was withdrawn and exposed to the HS of the liquid cow slurry. This way derivatisation of VFAs took place in the SPME fibre together with the preconcentration of the rest of the analytes of interest. The analytes were desorbed in the hot injection port (300 degrees C) of a GC-MS for 3 min. Four different fibre types and different immersion periods of the fibre in the PDAM solution were studied in order to obtain the best sensitivity with the selected fibre. Accuracy, precision and the LODs were calculated using spiked liquid and gas samples. The possibility of storing liquid samples after sampling by preconcentration on the fibre was also considered. Storage time and temperature were studied. The optimised method was applied to the determination of the analytes in liquid and gas samples from cow slurries from an intensive production farm"
Keywords:		"Animals Cattle Fatty Acids, Volatile/*isolation & purification Gases/analysis Indoles/*isolation & purification Odorants/analysis Phenols/*isolation & purification Solid Phase Microextraction/*methods/standards/statistics & numerical data Waste Disposal, ;"
Notes:		"MedlineLarreta, Joana Vallejo, Asier Bilbao, Urdax Usobiaga, Aresatz Arana, Gorka Zuloaga, Olatz eng Research Support, Non-U.S. Gov't Germany 2007/08/09 J Sep Sci. 2007 Sep; 30(14):2293-304. doi: 10.1002/jssc.200700087"