NEMI Method Summary


Method Summary Information

Method Number:

I-1399

Media:

WATER

Revision:

1985

Method Source:

U.S. Geological Survey (USGS)

Subcategory:

INORGANIC

Analytes in this method

Official Name:

Lead, atomic absorption spectrometric, direct

Descriptive Name

Lead, dissolved, FLAA

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

131190

Byte file

Brief Method
Summary:

Lead is determined by flame atomic absorption spectrometry by direct aspiration of the sample solution into an air-acetylene flame.

Scope And
Application:

This method may be used to analyze water containing at least 100 ug/L of lead. Sample solutions containing more than 4,000 ug/L need either to be diluted or to be read on a less expanded scale.

Applicable
Conc Range:

100 ug/L to 4,000 ug/L

Interferences:

Individual concentrations of sodium (9,000 mg/L), potassium (9,000 mg/L), calcium (4,000 mg/L), magnesium (4,000 mg/L), nitrate (900 mg/L), iron (4 X 10⁶ ug/L), and cadmium, nickel, copper, zinc, cobalt, and chromium (10,000 ug/L) do not interfere. Higher concentrations of each constituent were not investigated.

QC Requirements:

Calibrate instrument using calibration standards (CAL). Quality control samples (QCS) and laboratory blanks (LB) analyzed at a minimum of I each after every 10 samples

Sample Handling:

Container Description: 250 mL Polyethylene bottle, acid-rinsed.
Treatment and Preservation: Filter through 0.45-um filter, use filtered sample to rinse containers and acidify sample with HNO₃ to pH < 2.

Max Holding Time:

180 days

Relative Cost:

Less than $50

5650

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Method Summary Information