USGS Test Method I-2274

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Method Name:
Copper, dissolved in water by GFAA. Official Name: Copper, atomic absorption spectrophotometry, graphite furnace

Copper is determined by atomic absorption spectrophotometry in conjunction with a graphite furnace containing a graphite platform (Hinderberger and others, 1981). A sample is placed on the graphite platform, and the sample then is evaporated to dryness, charred, and atomized using high-temperature ramping. The absorption signal produced during atomization is recorded and compared with standards.

This method is used to determine copper in samples of water with a specific conductance not greater than 10,000 uS/cm.

M.J. Fishman, 1993, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory--Determination of inorganic and organic constituents in water and fluvial sediments: U.S. Geological Survey Open-File Report 93-125

Interferences for samples with specific conductances less than 10,000 uS/cm normally are small. In addition, the use of the graphite platform reduces the effects of many interferences.

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

Maximum Holding Time:
180 days




Additional data are available in the method.

Single operator analyzed six replicates of 1.5 ug/L copper solution had standard deviation of 0.09ug/L Percent Relative standard deviation was 6.0

Revision Number:

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