Standard Methods: 6420B: Phenols in Water by Liquid-Liquid Extraction GC

Summary
Analytes
Revisions
Data and Sites

Official Method Name

Liquid-Liquid Extraction Gas Chromatographic Method

Current Revision

Standard Methods Online

Media

WATER

Instrumentation

Gas Chromatography with Electron Capture Detection

Method Subcategory

Organic

Method Source

Standard Methods

Citation

Standard Methods Online - Standard Methods for the Examination of Water and Wastewater

Brief Method Summary

A measured volume of sample is acidified and extracted with methylene chloride. The extract is dried and exchanged to 2-propanol during concentration. The extract is separated by GC and phenols are measured with a FID.

Scope and Application

Phenols

Applicable Concentration Range

None given

Interferences

Method interferences may be caused by contaminants in solvents, reagents, glassware, and other sample-processing hardware that lead to discrete artifiacts and/or elevated base lines in detector output.

Quality Control Requirements

Include method blanks, an initial demonstration of laboratory capability and detection limits, assessment of the internal standard recovery, determination of surrogate compound recoveries, evaluation of calibration data and curves, sample matrix additions, and precision of replicate sample analysis.

Sample Handling

Collect grab samples in 1-L amber glass bottles fitted with a screw cap lined with TFE. Foil may be substituted for TFE if the sample is not corrosive. If amber bottles are not available, protect samples from light. Wash and rinse bottle and cap liner with acetone or methylene chloride, and dry before use. Follow conventional sampling practices but do not rinse bottle with sample. Collect composite samples in refrigerated glass containers.
Fill sample bottles and, if residual chlorine is present, add 80 mg sodium thiosulfate per liter of sample and mix well. Ice all samples or refrigerate at 4^oC from time of collection until extraction.

Maximum Holding Time

Extract samples within 7 d of collection and analyze completely within 40 d of extraction.

Relative Cost

$201 to $400

Sample Preparation Methods

This method has 14 analytes associated with it.

Analyte	Detection Level	Bias	Precision	Spiking Level
2,4,6-Trichlorophenol(88-06-2) 2,4,6-Trichlorophenol Dowicide 2S Phenachlor Phenol, 2,4,6-trichloro-	0.640 ug/L	84% Rec (ML)	N/A
2,4-Dichlorophenol(120-83-2) 1,3-dichloro-4-Hydroxybenzene 2,4-Dichlorophenol DCP Dichlorophenol, 2,4- Phenol, 2,4-dichloro-	0.390 ug/L	83% Rec (ML)	N/A	20.00 ug/L
2,4-Dimethylphenol(105-67-9) 2,4-Cimethylphenol 2,4-Dimethylphenol 2,4-Xylenol 4,6-Dimethylbenzene Bacticin Dimethylbenzene,1-hydroxy-2,4- Dimethylbenzene,4-hydroxy-1,3- Dimethylphenol, 2,4- Phenol, 2,4-dimethyl-	0.320 ug/L	59% Rec (ML)	N/A	20.00 ug/L
2,4-Dinitrophenol(51-28-5) .alpha.-Dinitrophenol 2,4-Dinitrophenol 2,4-Dnp Aldifen Dinitrobenzene,1-hydroxy-2,4- Fenoxyl carbon n Phenol, 2,4-dinitro	13.000 ug/L	77% Rec (ML)	N/A	50.00 ug/L
2-Chlorophenol(95-57-8) 2-Chlorophenol Phenol, 2-chloro- Phenol, o-chloro- o-Chlorophenol	0.310 ug/L	79% Rec (ML)	N/A	20.00 ug/L
2-Methyl-4,6-dinitrophenol(534-52-1) 2,4-Dinitro-6-methyl-phenol 2,4-Dinitro-o-cresol 2-Methyl-4,6-dinitrophenol 4,6-Dinitro-o-cresol DNOC Dinitrocresol Methyl-4,6-dinitrophenol,2- Phenol, 2-methyl-4,6-dinitro-	16.000 ug/L	82% Rec (ML)	N/A	50.00 ug/L
2-Nitrophenol(88-75-5) 2-Hydroxynitrobenzene 2-Nitrophenol Phenol, 2-nitro- Phenol, o-nitro- o-Hydroxynitrobenzene o-Nitrophenol	0.450 ug/L	77% Rec (ML)	N/A	20.00 ug/L
4-Chloro-3-methylphenol(59-50-7) 3-Methyl-4-chlorophenol 4-Chloro-1-hydroxy-3-methylbenzene 4-Chloro-3-cresol 4-Chloro-3-hydroxytoluene 4-Chloro-3-methylphenol 4-Chloro-m-cresol Chlorophenol, 4-, methyl, 3- Parachlorometacresol Phenol, 4-chloro-3-methyl- p-Chloro-m-cresol	0.360 ug/L	77% Rec (ML)	N/A	20.00 ug/L
4-Nitrophenol(100-02-7) 1-hydroxy-4-Nitrobenzene 4-Hydroxynitrobenzene 4-Nitrophenol Phenol, 4-nitro- p-Hydroxynitrobenzene p-Nitrophenol	2.800 ug/L	46% Rec (ML)	N/A	50.00 ug/L
Organics, semivolatile(E-12884) Organics, semivolatile Semi-volatile organics Semivolatile organics	N/A	N/A	N/A
Organochlorine pesticides(E-12851) Organochlorine pesticides Pesticides, organochlorine	N/A	N/A	N/A
Pentachlorophenol(87-86-5) PCP Penchlorol Penta Pentachlorophenol Phenol, pentachloro- Santophen I	7.400 ug/L	93% Rec (ML)	N/A
Phenol(108-95-2) Benzene, hydroxy- Carbolic acid Hydroxybenzene Oxybenzene Phenic acid Phenol Phenyl hydrate Phenyl hydroxide	0.140 ug/L	44% Rec (ML)	N/A
Volatile organic compounds(E-12419) Organic compounds, volatile VOCs Volatile organic compounds	N/A	N/A	N/A

Precision Descriptor Notes:	Precision and accuracy values were determined using data from EPA Method 604.
Detection Level Note:	Based on the analysis of reagent water with known additions.

Revision	PDF/Link
Standard Methods Online
Standard Methods 18th, 19th, 20th ed.
Standard Methods 19th Edition (1995)
Standard Methods 18th Edition (1992)

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Standard Methods: 6420B: Phenols in Water by Liquid-Liquid Extraction GC

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