文档介绍：Advances in Environmental Research 4Ž. 2000 97᎐102
munication
parison of sampling techniques for VOCs in soil
Margaret W. CouchU, Charles J. Schmidt, Scott C. Wasdo
Analytical Toxicology Core Laboratory, Center for En¨ironmental and Human Toxicology, College of Veterinary Medicine,
Uni¨ersity of Florida, . Box 110885, Gaines¨ille, FL 32611-0885, USA
Accepted 23 February 2000
Abstract
SamplesŽ. 5 g of anic soil spiked with a standard pound mixture were collected by two
methods. One group of samples was weighed upon transfer with a spatula into vials, an aqueous sodium bisulfate
solution and a ic stirring bar were added and the vial was immediately capped. The other group of samples
was obtained with a coring sampler that collected a volume of soil equivalent to 5 g. The sample was immediately
transferred into similarly prepared vials. The vials were then sealed with septum-sealed screw caps. Analytes were
extracted from the soil matrix using a purge-and-trap technique, SW-846 EPA Method 5035, and then separated,
identified, and quantitated by gas chromatographyrmass spectrometry SW-846 EPA Method 8260. Samples obtained
by means of the coring sampler consistently gave lower recoveries than did those samples that were manually
weighed and placed in a sample vial. ᮊ 2000 Elsevier Science Ltd. All rights reserved.
Keywords: SW-846 Method 5035; SW-846 Method