NEMI Method Summary


Method Summary Information

Method Number:

252.1

Media:

WATER

Revision:

Issued 1976; Technical Revision 1978

Method Source:

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

Analytes in this method

Subcategory:

INORGANIC

Official Name:

Osmium (Atomic Absorption, Direct Aspiration)

Descriptive Name

Osmium 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)

10781

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

Applicable
Conc Range:

2-100 mg/L (optimal range); 1.0 mg/L (sensitivity).

Interferences:

For 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. Osmium tetroxide is very volatile and highly toxic. Care should be exercised when working with this compound.

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