USGS-NWQL: I-7270:  Copper, suspended recoverable from water; by FLAA.

  • Summary
  • Analytes
  • Revision
  • Data and Sites
Official Method Name
Copper, 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
Copper 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 or both.
Scope and Application
This method may be used to analyze water and water-suspended sediment containing at least 10 ug/L of copper. Sample solutions containing more than 1,000 ug/L need either to be diluted or to be read on a less expanded scale. Brines need to be analyzed by the atomic absorption spectrometric chelation-extraction method, providing that the interference limits discussed in that method are not exceeded.
Suspended recoverable copper is calculated by subtracting dissolved copper from total recoverable copper.
Applicable Concentration Range
10 - 1,000 ug/L
Interferences
Individual concentrations of sodium (9,000 mg/L), potassium (9,000 mg/L), calcium (4,000mg/L), magnesium (4,000 mg/L), sulfate (9,000 mg/L), chloride (9,000 mg/L), nitrate (2,000 mg/L), iron (4 X 106ug/L), lead, cadmium, zinc, and chromium (10,000 ug/L each) do not interfere. Higher concentrations of each constituent were not investigated. Nickel and cobalt concentrations greater than 8,000 ug/L suppress the copper absorption.
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 Descriptions: 250 mL Polyethylene bottles, acid-rinsed. Treatment and Preservation: Use unfiltered sample to rinse bottle, then acidify collected sample with HNO3 to pH <2. For second sample, 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