NEMI Method Summary


Method Summary Information

Method Number:

506

Media:

WATER

Revision:

Revision 1.1, 1995

Method Source:

U.S. EPA National Exposure Research Laboratory (NERL) [formerly EMSL]

Analytes in this method

Subcategory:

ORGANIC

Official Name:

Determination of Phthalate and Adipate Esters in Drinking Water by Liquid-Liquid Extraction or Liquid Solid Extraction and Gas Chromatography with Photoionization Detection

Descriptive Name

Phthalate and Adipate Esters in Water by GCPID

Source Info:

U.S.EPA National Exposure Research Laboratory (NERL)
Microbiological and Chemical Exposure Assessment Research Division (MCEARD)
[formerly the Environmental Monitoring Systems Laboratory (EMSL), Cincinnati, OH]
26 West Martin Luther King Drive
Cincinnati, Ohio 45268-0001
Fax: 513-569-7757
email: DWmethods.help@epa.gov

Citation:

Methods for the Determination of Organic Compounds in Drinking Water - Supplement III (EPA/600/R-95-131)

133088

Byte file

Brief Method
Summary:

Samples are extracted using liquid/liquid extraction (LLE) or liquid/solid extraction (LSE). For LLE, a 1-L sample is extracted with methylene chloride followed by hexane using a glass separatory funnel, and the final extract is dried and reduced to a to a volume of 1-mL. For LSE a measured volume of sample is extracted with a LSE cartridge or disk, and eluted using acetonitrile and methylene chloride (or pure methylene chloride), and the eluent/extract is reduced to a volume of 1-mL. The concentrations of esters in the extracts are measured using a gas chromatography (GC) system equipped with a photoionization detector (PID).

Scope And
Application:

This method determines certain phthalate and adipate esters in drinking water.

Applicable
Conc Range:

Ranges differ for each analyte depending on matrix and instrumentation.

Interferences:

(A) Phthalate ester interference: Avoid the use of plastics and use pure reagents to avoid contamination by these ubiquitous compounds.

(B) Glassware contamination: Thoroughly clean glassware, including baking or solvent rinse.

(D) Extracted interferences: Interference from extracted non-target compounds, with retention times similar to target compounds, can be reduced by cleaning the extract.

(E) Variable solvents: Use the same solvent for each analysis.

QC Requirements:

Initial demonstration of laboratory capability, followed by analysis of laboratory reagent blanks (LRB), laboratory fortified blanks (LFB), laboratory fortified sample matrix (LFM), and quality control samples (QCS). A MDL for each analyte must also be determined. Additional quality control practices are recommended.

Sample Handling:

Grab samples must be collected in amber glass containers. Conventional sampling practices should be followed; however, the bottle must not be pre-rinsed with sample prior to collection. Add 80 mg of sodium thiosulfate for dechlorination to the sample bottle at the sampling site or in the laboratory prior to shipping to the sampling site. After sample is collected, seal the bottle and swirl until the sodium thiosulfate is dissolved. Samples must be iced or refrigerated at 4^oC free from light from the time of collection until extraction.

Max Holding Time:

Samples must be extracted within 14 days. Extracts can be held for an additional 14 days prior to analysis.

Relative Cost:

$201 to $400

4800

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Method Summary Information