NEMI Method Summary

Method Summary Information

Method Number: I-1454 Media: WATER
Revision: 1985
Method Source: U.S. Geological Survey (USGS)
Subcategory: INORGANIC Analytes in this method
Official Name: Manganese, atomic absorption spectrometric, direct
Descriptive Name Manganese, 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
156586 Byte file
Brief Method
Summary:
Manganese is determined by flame atomic absorption spectrometry by direct aspiration of the sample into an air-acetylene flame without preconcentration or pretreatment. The procedure may be automated by the addition of a sampler and either a strip-chart recorder or a printer or both.
Scope And
Application:
This method may be used to analyze water containing at least 10 ug/L of manganese. Sample solutions containing more than 1,000 ug/L need either to be diluted or to be read on a less expanded scale.
Applicable
Conc Range:
10 ug/L to 1,000 ug/L
Interferences: Magnesium (100 mg/L) and silica (100 mg/L) do not interfere. Magnesium in excess of 100 mg/L may present some interference, especially when the manganese concentration exceeds 500 ug/L. Silica interferes above 100 mg/L. Iron concentration to 4 X 106 ug/L does not interfere.
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
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