Method Description Sheet

Method EPA Method 524.2
Title MEASUREMENT OF PURGEABLE ORGANIC COMPOUNDS IN WATER BYCAPILLARY COLUMN GAS CHROMATOGRAPHY/MASS SPECTROMETRY
Abstract Volatile organic compounds and surrogates with low water solubility are extracted (purged) from the sample matrix by bubbling an inert gas through the aqueous sample. Purged sample components are trapped in a tube containing suitable sorbent materials. When purging is complete, the sorbent tube is heated and backflushed with helium to desorb the trapped sample components into a capillary gas chromatography (GC) column interfaced to a mass spectrometer (MS). The column is temperature programmed to facilitate the separation of the method analytes which are then detected with the MS. 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 ahalytes 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 :

Selecting a CAS number from the table below will direct you to the
National Library of Medicine's Hazardous Substances Database for more details on the compound.

CAS #Compound Name
67-64-1Acetone
107-13-1Acrylonitrile
107-05-1Allyl chloride
71-43-2 Benzene
108-86-1Bromobenzene
74-97-5 Bromochloromethane
75-27-4Bromodichloromethane
75-25-2 Bromoform
74-83-9Bromomethane
78-93-32-Butanone
104-51-8n-Butylbenzene
135-98-8sec-Butylbenzene
98-06-6 tert-Butylbenzene
75-15-0Carbon disulfide
56-23-5Carbon tetrachloride
107-14-2Chloroacetonitrile
108-90-7Chlorobenzene
109-69-31-Chlorobutane
75-00-3 Chloroethane
67-66-3Chloroform
74-87-3Chloromethane
95-49-82-Chlorotoluene
106-43-4 4-Chlorotoluene
124-48-1Dibromochloromethane
96-12-8 1,2-Dibromo-3-chloropropane
106-93-41,2-Dibromoethane
74-95-3 Dibromomethane
95-50-11,2-Dichlorobenzene
541-73-11,3-Dichlorobenzene
106-46-71,4-Dichlorobenzene
110-57-6trans-1,4-Dichloro-2-butene
75-71-8 Dichlorodifluoromethane
75-34-31,1-Dichloroethane
107-06-21,2-Dichloroethane
75-35-4 1,1-Dichloroethene
156-59-2cis-1,2-Dichloroethene
156-60-5trans-1,2-Dichloroethene
78-87-5 1,2-Dichloropropane
142-28-91,3-Dichloropropane
594-20-72,2-Dichloropropane
563-58-61,1-Dichloropropene
513-88-21,1-Dichloropropanone
10061-01-5cis-1,3-Dichloropropene
10061-02-6trans-1,3-Dichloropropene
60-29-7 Diethyl ether
100-41-4Ethylbenzene
97-63-2 Ethyl methacrylate
87-68-3Hexachlorobutadiene
67-72-1Hexachloroethane
591-78-62-Hexanone
98-82-8 Isopropylbenzene
99-87-64-Isopropyltoluene
126-98-7Methacrylonitrile
96-33-3 Methylacrylate
75-09-2Methylene chloride
74-88-4Methyl iodide
80-62-6Methylmethacrylate
108-10-14-Methyl-2-pentanone
1634-04-4Methyl-t-butyl ether
91-20-3 Naphthalene
98-95-3Nitrobenzene
79-46-92-Nitropropane
76-01-7Pentachloroethane
107-12-0Propionitrile
103-65-1n-Propylbenzene
100-42-5Styrene
630-20-61,1,1,2-Tetrachloroethane
79-34-51,1,2,2-Tetrachloroethane
127-18-4Tetrachloroethene
109-99-9Tetrahydrofuran
108-88-3Toluene
87-61-6 1,2,3-Trichlorobenzene
120-82-11,2,4-Trichlorobenzene
71-55-6 1,1,1-Trichloroethane
79-00-51,1,2-Trichloroethane
79-01-6Trichloroethene
75-69-4 Trichlorofluoromethane
96-18-41,2,3-Trichloropropane
95-63-61,2,4-Trimethylbenzene
108-67-81,3,5-Trimethylbenzene
75-01-4 Vinyl chloride
95-47-6o-Xylene
108-38-3m-Xylene
106-42-3 p-Xylene
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