EPA-RCA: 8011: EDB and DBCP by Microextraction and Gas Chromatography

Summary
Analytes
Revision
Data and Sites

Official Method Name

1,2-Dibromoethane and 1,2-Dibromo-3-chloropropane by Microextraction and Gas Chromatography

Current Revision

Revision 0, July 1992

Media

WATER

Instrumentation

Gas Chromatography with Electron Capture Detection

Method Subcategory

Organic

Method Source

EPA-RCA

Citation

SW-846 Online: Test Methods for Evaluating Solid Waste, Physical/Chemical Methods

Brief Method Summary

Samples are extracted with hexane and are analyzed using a gas chromatograph equipped with an electron capture detector.

Scope and Application

This method determines the concentration of EDB and DBCP in drinking and ground water.

Applicable Concentration Range

0.03 - 200 ug/L.

Interferences

(A) Contamination: Impurities found in hexane used in extraction is the source for the majority of interferences. These impurities may be discovered through the analysis of reagent blanks. The impurities can be removed by distillation or column chromatography, however, it is recommended to obtain a new source of hexane solvent. Sample contamination may occur by diffusion of volatile organics through the septum seal during shipment and storage. The analysis of trip blanks will identify this problem.
(B) Matrix interferences: The extraction technique extracts a wide range of non-polar organic compounds and some polar organic compounds. EDB at low concentrations may be masked by high concentrations of dibromochloromethane when using the confirmation column.

Quality Control Requirements

Periodic analysis of laboratory reagent and calibration blanks, reference and check standards, spikes, and replicates as a continuing check on performance.

Sample Handling

See SW-846 Chapter Four for information.

Maximum Holding Time

See SW-846 Chapter Four for information.

Relative Cost

$201 to $400

Sample Preparation Methods

Method 8011

This method has 3 analytes associated with it.

Analyte	Detection Level	Bias	Precision	Spiking Level
1,2-Dibromoethane(106-93-4) 1,2-Dibromoethane Bromofume Dowfume EDB Ethane, 1,2-dibromo- Ethylene bromide Ethylene dibromide Glycol dibromide	0.010 ug/L	114% Rec (SL)	9.50 % RSD (SL)	0.03 ug/L
DBCP(96-12-8) 1,2-Dibromo-3-chloropropane Chloro-1,2-dibromopropane,3- DBCP Dibromochloropropane Fumagon, Fumazone Nemabrom, Nemafume, Nemagon, Nematocide Nemagon Nematocide Propane, 1,2-dibromo-3-chloro-	0.010 ug/L	90% Rec (SL)	11.40 % RSD (SL)	0.03 ug/L
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 calculated using data from 7 replicate analyses of tap water during a single laboratory study.
Detection Level Note:	To establish the ability to achieve low detection limits, prepare seven samples each at a concentration of 0.03 ug/L. Analyze accordingly. Then, calculate the average concentration and the standard deviation of the concentrations for each analyte, using the seven results. Then, calculate the MDL at 99% confidence level for seven replicates as 3.143s. The average concentration must be between 60% and 140% of the true value, and the MDL may not exceed the 0.03 ug/L spiked concentration.

Precision Descriptor Notes:

Precision and accuracy values were calculated using data from 7 replicate analyses of tap water during a single laboratory study.

Detection Level Note:

To establish the ability to achieve low detection limits, prepare seven samples each at a concentration of 0.03 ug/L. Analyze accordingly. Then, calculate the average concentration and the standard deviation of the concentrations for each analyte, using the seven results. Then, calculate the MDL at 99% confidence level for seven replicates as 3.143s. The average concentration must be between 60% and 140% of the true value, and the MDL may not exceed the 0.03 ug/L spiked concentration.

Revision	PDF/Link
Revision 0, July 1992

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EPA-RCA: 8011: EDB and DBCP by Microextraction and Gas Chromatography

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