Paragon Laboratories
12649 Richfield Ct.
Livonia, MI 48150
734.462.3900 Phone

Volatile Organic Compounds in Wastewater Analysis by EPA 624.1

Summary

EPA 624.1 is used to determine the concentrations of Volatile Organic Compounds (VOCs) in wastewater.

Technique

EPA 624.1 is performed by purging low-solubility VOCs from the sample, trapping those VOCs in a sorbent tube, and then desorbing the VOCs from the sorbent tube and into a capillary gas chromatography column that is interfaced to a mass spectrometer (GC/MS).

Holding Time

All samples must be analyzed within 14 days of collection. Samples not analyzed within this period must be discarded and replaced.

Container and Preservative

Collect all samples in (2) 40-mL clear glass vials fitted with fluoropolymer-lined screw caps containing 0.25 to 0.5 mL of 1+1 hydrochloric acid (HCl), attaining a pH of 2. Fill each vial in such a manner that no air bubbles pass through the sample as the bottle is being filled, and so that no air bubbles are entrapped in it after sealing (zero headspace). Ice or refrigerate samples at ≤6 °C from the time of collection until analysis, but do NOT freeze. If residual chlorine is present, add a dechlorinating agent (e.g., 80 mg/L sodium thiosulfate, ascorbic acid, or sodium sulfite) and gently mix prior to sealing the vials.

Shipping/Transport Instructions

Samples must be chilled to >0°C to ≤6 °C at collection and kept at >0 °C to ≤6 °C until analyzed. Field samples must be packaged for shipment with sufficient ice to ensure that they will be >0 °C to ≤6 °C upon arrival at the laboratory.

Analytes and Reporting

Limits Analytes routinely reported are listed below.

 

Analyte CAS Number Reporting Limit
Dichlorodifluoromethane 75-71-8 1 µg/L
Chloromethane(Methyl chloride) 74-87-3 1 µg/L
Vinyl chloride 75-01-4 1 µg/L
Bromomethane (Methyl bromide) 74-83-9 1 µg/L
Chloroethane 75-00-3 1 µg/L
Trichlorofluoromethane 75-69-4 1 µg/L
1,1,2-Trichloro-1,2,2-trifluor tri-tri 1 µg/L
Acrolein 107-02-8 5 µg/L
Acetone 67-64-1 5 µg/L
1,1-Dichloroethene 75-35-4 1 µg/L
Iodomethane (Methyl iodide) 74-88-4 1 µg/L
Carbon disulfide 75-15-0 1 µg/L
Acetonitrile 75-05-8 5 µg/L
Methylene chloride (DCM) 75-09-2 1 µg/L
Acrylonitrile 107-13-1 5 µg/L
Methyl tert-butyl ether (MTBE) 1634-04-4 1 µg/L
trans-1,2-Dichloroethene 156-60-5 1 µg/L
1,1-Dichloroethane 75-34-3 1 µg/L
Vinyl acetate 108-05-4 1 µg/L
2-Butanone (MEK) 78-93-3 5 µg/L
2,2-Dichloropropane 590-20-7 1 µg/L
cis-1,2-Dichloroethene 156-59-2 1 µg/L
Chloroform 67-66-3 1 µg/L
Bromochloromethane 74-97-5 1 µg/L
1,1,1-Trichloroethane 71-55-6 1 µg/L
Carbon tetrachloride 56-23-5 1 µg/L
1,1-Dichloropropene 563-58-6 1 µg/L
1,2-Dichloroethane (EDC) 107-06-2 1 µg/L
Benzene 71-43-2 1 µg/L
Trichloroethene (TCE) 79-01-6 1 µg/L
1,2-Dichloropropane 78-87-5 1 µg/L
2-Chloroethyl vinyl ether 110-75-8 1 µg/L
Bromodichloromethane 75-27-4 1 µg/L
Dibromomethane 74-95-3 1 µg/L
4-Methyl-2-pentanone (MIBK) 108-10-1 5 µg/L
cis-1,3-Dichloropropene 10061-01-5 1 µg/L
Toluene 108-88-3 1 µg/L
trans-1,3-Dichloropropene 10061-02-6 1 µg/L
2-Hexanone 591-78-6 5 µg/L
1,1,2-Trichloroethane 79-00-5 1 µg/L
1,3-Dichloropropane 142-28-9 1 µg/L
Tetrachloroethene (PCE) 127-18-4 1 µg/L
Dibromochloromethane 124-48-1 1 µg/L
1,2-Dibromoethane (EDB) 106-93-4 1 µg/L
Chlorobenzene 108-90-7 1 µg/L
Ethylbenzene 100-41-4 1 µg/L
1,1,1,2-Tetrachloroethane 630-20-6 1 µg/L
m- & p-Xylene m&p-xylene 2 µg/L
o-Xylene 95-47-6 1 µg/L
Styrene 100-42-5 1 µg/L
Isopropylbenzene (Cumene) 98-82-8 1 µg/L
Bromoform 75-25-2 1 µg/L
1,1,2,2-Tetrachloroethane 79-34-5 1 µg/L
1,2,3-Trichloropropane 96-18-4 1 µg/L
1,3,5-Trimethylbenzene (TMB) 108-67-8 1 µg/L
n-Propylbenzene 103-65-1 1 µg/L
Bromobenzene 108-86-1 1 µg/L
trans-1,4-Dichloro-2-butene 110-57-6 1 µg/L
2-Chlorotoluene 95-49-8 1 µg/L
4-Chlorotoluene 106-43-4 1 µg/L
tert-Butylbenzene 98-06-6 1 µg/L
1,2,4-Trimethylbenzene (TMB) 95-63-6 1 µg/L
sec-Butylbenzene 135-98-8 1 µg/L
4-Isopropyltoluene 99-87-6 1 µg/L
1,3-Dichlorobenzene 541-73-1 1 µg/L
1,4-Dichlorobenzene 106-46-7 1 µg/L
n-Butylbenzene 104-51-8 1 µg/L
1,2-Dichlorobenzene 95-50-1 1 µg/L
1,2-Dibromo-3-chloropropane 96-12-8 1 µg/L
1,2,4-Trichlorobenzene 120-82-1 1 µg/L
Hexachlorobutadiene 87-68-3 1 µg/L
Naphthalene 91-20-3 5 µg/L
1,2,3-Trichlorobenzene 87-61-6 1 µg/L
2-Methylnaphthalene 91-57-6 5 µg/L
Xylenes, Total 1330-20-7 (T) 3 µg/L