NEMI Method Summary


Method Summary Information

Method Number:

208.1

Media:

WATER

Revision:

Issued 1974

Method Source:

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

Analytes in this method

Subcategory:

INORGANIC

Official Name:

Barium (Atomic Absorption, Direct Aspiration)

Descriptive Name

Barium by Flame AA

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 Chemical Analysis of Water and Wastes (MCAWW) (EPA/600/4-79/020)

12929

Byte file

Brief Method
Summary:

A sample prepared according to EPA Method 200.0 is analyzed using a flame atomic absorption spectrometer. Specifications for instrument operation and preparation of standards are provided in the method.

Scope And
Application:

This method determines barium by flame atomic absorption spectrometry. Sample pretreatment according to EPA Method 200.0 determines the applicability.

Applicable
Conc Range:

1,000 - 20,000 ug/L (optimal range); 400 ug/L (sensitivity).

Interferences:

(A) Ionization: Barium is easily ionized by the oxide-acetylene flame. Add potassium (1000 mg/L) to samples and standards to control this effect.
(B) Acetylene-Air: If acetylene-air is used, phosphate, silicon, and aluminum will severely suppress the barium absorbance. This may be overcome by adding 2000 mg/L of lanthanum.
For additional interferences see EPA Method 200.0.

QC Requirements:

QC requirements for drinking water procedures are provided in method 200.0.

Sample Handling:

Sample handling and preservation procedures are provided in EPA Method 200.0.

Max Holding Time:

6 months (MCAWW, Table 1).

Sample Prep Met

200.0

Relative Cost:

Less than $50

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Method Summary Information