USGS-NWQL: I-1454:  Manganese, dissolved, FLAA

  • Summary
  • Analytes
  • Revision
  • Data and Sites
Official Method Name
Manganese, atomic absorption spectrometric, direct
Current Revision
1985
Media
WATER
Instrumentation
Flame Atomic Absorption
Method Subcategory
Inorganic
Method Source
  USGS-NWQL
Citation
Methods for the Determination of Inorganic Substances in Water and Fluvial Sediments, Techniques of Water-Resources Investigations of the United States Geological Survey, Book 5, Chapter A1 Edited by Marvin J. Fishman and Linda C. Friedman
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 Concentration 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.
Quality Control 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.
Maximum Holding Time
180 days
Relative Cost
Less than $50
Sample Preparation Methods