USGS Test Method I-3054


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PDF IconView Actual USGS Method I-3054 (PDF File)


Source:
USGS

Method Name:
Aluminum, total recoverable, water, DCP. Official Name: Aluminum, atomic emission spectrometric, d-c plasma

Description:
Aluminum is determined by a direct-reading emission spectrometer which utilizes a d-c argon plasma as an excitation source (Johnson and others, 1979 a,b, 1980). A mixture of lithium chloride, sulfuric acid, and glycerin is added to samples and standards to provide a common background matrix and to compensate for viscosity changes. The liquid mixture is then converted by a ceramic nebulizer into a fine aerosol and introduced into the plasma via a plastic spray chamber and Pyrex injection tube. Aluminum is determined on the basis of the average of two replicate exposures, each of which is performed on a 10-second integrated intensity. Calibration is performed by standardization with a high-standard solution and a blank.

Scope:
This method may be used to analyze finished water, natural water, industrial water, and water-suspended sediment containing from 10 to 1000 ug/L of aluminum. Samples containing more than 1000 ug/L aluminum and (or) with specific conductances greater than 10,000 uS/cm need to be diluted. Total recoverable aluminum in water-suspended sediment needs to undergo a preliminary digestion-solubilization by method I-3485 before being determined.

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

Interferences:
Stray-light effects in a high-resolution, single-element d-c argon plasma emission spectrometer are negligible.

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. (Reference OFR 95-443).

Maximum Holding Time:
180 days

Media:
WATER

Subcategory:
Inorganic

Concentration:
10-1000 ug/L

Sample Prep:
I-3485

Precision:
-

Detection:
Minimum reporting level

Revision Number:
Revised 1985

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