NEMI Method Summary

Method Summary Information

Method Number: I-1456 Media: WATER
Revision: 1985
Method Source: U.S. Geological Survey (USGS)
Subcategory: INORGANIC Analytes in this method
Official Name: Manganese, atomic absorption spectrometric, chelation-extraction
Descriptive Name Manganese, dissolved, chelation extraction, 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
130901 Byte file
Brief Method
Summary:
 Manganese is determined by flame atomic absorption spectrometry following chelation with ammonium pyrrolidine dithiocarbamate (APDC) and extraction with chloroform. The extract is evaporated to dryness, treated with hot nitric acid to destroy organic matter, dissolved in hydrochloric acid, and diluted to a specified volume with demineralized water. The resulting solution is aspirated into the air-acetylene flame of the spectrometer.
Scope And
Application:
 This method may be used to analyze water and brines containing from 1 to 100 ug/L of manganese. Brines containing more than 100 ug/L need either to be diluted or to be read on a less expanded scale. Samples containing more than 100 ug/L need either to be diluted prior to chelation-extraction or to be analyzed by the atomic absorption spectrometric direct method, providing that the interference limits discussed in that method are not exceeded.
Applicable
Conc Range:
 1 to 100 ug/L manganese
Interferences: Concentrations of iron to 4 X 106 ug/L do not interfere; higher concentrations were not tested.
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
5656
Page 1