Methods of analysis-Determination of pesticides in sediment using gas chromatography/mass spectrometry

Hladik, Michelle L.; McWayne, Megan M.

Abstract:

A method for the determination of 119 pesticides in environmental sediment samples is described. The method was developed by the U.S. Geological Survey (USGS) in support of the National Water Quality Assessment (NAWQA) Program. The pesticides included in this method were chosen through prior prioritization. Herbicides, insecticides, and fungicides along with degradates are included in this method and span a variety of chemical classes including, but not limited to, chloroacetanilides, organochlorines, organophosphates, pyrethroids, triazines, and triazoles. Sediment samples are extracted by using an accelerated solvent extraction system (ASE®, and the compounds of interest are separated from co-extracted matrix interferences (including sulfur) by passing the extracts through high performance liquid chromatography (HPLC) with gel-permeation chromatography (GPC) along with the use of either stacked graphitized carbon and alumina solid-phase extraction (SPE) cartridges or packed Florisil®. Chromatographic separation, detection, and quantification of the pesticides from the sediment-sample extracts are done by using gas chromatography with mass spectrometry (GC/MS). Recoveries in test sediment samples fortified at 10 micrograms per kilogram (μg/kg) dry weight ranged from 75 to 102 percent; relative standard deviations ranged from 3 to 13 percent. Method detection limits (MDLs), calculated by using U.S. Environmental Protection Agency procedures (40 CFR 136, Appendix B), ranged from 0.6 to 3.4 μg/kg dry weight.

Genre:

USGS Numbered Series

ProdID:

70039873

Citation Author:

Hladik, Michelle L.; McWayne, Megan M.

Citation Contributing Office:

California Water Science Center

Citation Datum:

Citation Day:

Citation Edition:

Citation Editor:

Citation End Page:

Citation Issue:

Citation Keywords:

Citation Language:

English

Citation Larger Work Title:

Citation LatN:

Citation LatS:

Citation LonE:

Citation LonW:

Citation Month:

Citation No Pagination:

Citation Number Of Pages:

Citation Online Only Flag:

Citation Phsyical Description:

vi, 18 p.

Citation Projection:

Citation Public Comments:

Citation Publisher:

U.S. Geological Survey

Citation Series:

Techniques and Methods

Citation Series Code:

Citation Series Number:

5-C3

Citation Search Results Text:

Methods of analysis-Determination of pesticides in sediment using gas chromatography/mass spectrometry; 2012; TM; 5-C3; Hladik, Michelle L.; McWayne, Megan M.

Citation Start Page:

Citation Volume:

Citation Year:

2012

Type:

citation/reference

Text:

Methods of analysis-Determination of pesticides in sediment using gas chromatography/mass spectrometry; 2012; TM; 5-C3; Hladik, Michelle L.; McWayne, Megan M.