Method Description Sheet

Method EPA Method 525.2
Abstract Organic compound analytes, internal standards, and surrogates are extracted from a water sample by passing 1 liter of sample water through a cartridge containing about 1 gram of a solid inorganic matrix coated with a chemically bonded Cl8 organic phase (liquid-solid extraction, LSE). The organic compounds are eluted from the LSE cartridge with a small quantity of methylene chloride, and concentrated further by evaporation of some of the solvent. The sample components are separated, identified, and measured by injecting an aliquot of the concentrated methylene chloride extract into a high resolution fused silica capillary column of a gas chromatography/mass spectrometry (GC/MS) system. Compounds eluting from the GC column are identified by comparing their measured mass spectra and retention times to reference spectra and retention times in a data base. Reference spectra and retention times for analytes are obtained by the measurement of calibration standards under the same conditions used for samples. The concentration of each identified component is measured by relating the MS response of the quantitation ion produced by that compound to the MS response of the quantitation ion produced by a compound that is used as an internal standard. Surrogate analytes, whose concentrations are known in every sample, are measured with the same internal standard calibration procedure.

Compounds Analyzed :

CAS #Compound Name
208968 Acenaphthylene
15972608 Alachlor
309002 Aldrin
120127 Anthracene
1912249 Atrazine
56553 Benz[a]anthracene
205823 Benzo[b]fluoranthene
207089 Benzo[k]fluoranthene
50328 Benzo[a]pyrene
191242 Benzo[g,h,i]perylene
85687 Butylbenzylphthalate
5103719 Alpha-chlordane
5103742 Gamma-chlordane
39765805 Trans nonachlor
2051607 2-Chlorobiphenyl
218019 Chrysene
53703 Dibenz[a,h]anthracene
84722 Di-n-butylphthalate
16605917 2,3-Dichlorobiphenyl
84662 Diethylphthalate
103231 Di(2-ethylhexyl)adipate
117817 Di(2-ethylhexyl)phthalate
131113 Dimethylphthalate
72208 Endrin
86737 Fluorene
76448 Heptachlor
1024573 Heptachlor epoxide
52663715 2,2',3,3',4,4',6-Heptachlorobiphenyl
118741 Hexachlorobenzene
60145224 2,2',4,4',5,6'-Hexachlorobiphenyl
77474 Hexachlorocyclopentadiene
193395 Indeno[1,2,3,c,d]pyrene
58899 Lindane
72435 Methoxychlor
40186718 2,2',3,3',4,5',6,6'-Octachlorobiphenyl
60233252 2,2',3',4,6-Pentachlorobiphenyl
87865 Pentachlorophenol
85018 Phenanthrene
129000 Pyrene
122349 Simazine
2437798 2,2',4,4'-Tetrachlorobiphenyl
8001352 Toxaphene mixture
15862074 2,4,5-Trichlorobiphenyl
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