NEMI Method Summary


Method Summary Information

Method Number:

I-5735

Media:

SOILS/SEDIMENT

Revision:

1972

Method Source:

U.S. Geological Survey (USGS)

Subcategory:

INORGANIC

Analytes in this method

Official Name:

Sodium, atomic absorption spectrometric, direct

Descriptive Name

Sodium, recoverable-from-bottom-material, dry wt, atomic absorption spectrometric

Source Info:

USGS Branch of Information Services
Box 25286, MS 417
Federal Center
Denver, CO 80225-0286
Phone: 303-202-4700

Citation:

USGS Methods, Volume A1

122370

Byte file

Brief Method
Summary:

Sodium is determined by atomic absorption spectrometry by direct aspiration of the sample solution into an air-acetylene flame (Fishman and Downs, 1966).
The procedure may be automated by the addition of a sampler and either a strip-chart recorder or a printer.

Scope And
Application:

This method may be used to analyze bottom material containing at least 10 mg/kg of sodium.
Two analytical ranges for sodium are included: from 0.01 to 1.0 mg/L and from 0.10 to 80 mg/L. Sample solutions containing sodium concentrations greater than 80 mg/L need to be diluted.
Recoverable sodium in bottom material needs to undergo preliminary digestion-solubilization by method 1-5485 before being determined.

Applicable
Conc Range:

0.01 to 80 mg/L

Interferences:

None of the substances commonly occurring in natural water interfere with this method.

QC Requirements:

Calibrate instrument using calibration standards (CAL); quality control samples (QCS); and laboratory blanks (LB) analyzed at a minimum of 1 for every 10 samples.

Sample Handling:

Bottom Material (stream bed sediment) 500 mL wide mouth propylene bottle; no treatment or preservation requirements.

Max Holding Time:

180 days

Sample Prep Met

I-5485

Relative Cost:

Less than $50

5507

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Method Summary Information