ASTM: D857: Aluminum by FLAA

Summary
Analytes
Revision
Data and Sites

Official Method Name

Standard Test Method for Aluminum in Water

Current Revision

1995

Media

WATER

Instrumentation

Flame Atomic Absorption

Method Subcategory

Inorganic

Method Source

ASTM

Citation

Annual Book of ASTM Standards, Section 11, Water and Environmental Technology, Volume 11.01, Water (I)

Brief Method Summary

Aluminum is determined by direct atomic absorption with only the addition of an ionization suppressor and sensitivity enhancer (optional).

Scope and Application

This test method covers the direct flame atomic absorption determination of aluminum in the nitrous oxide-acetylene flame. This test method is applicable to waters containing dissolved and total recoverable aluminum in the range from 0.5 to 5.0 mg/L. Aluminum concentrations as high as approximately 50 mg/L can be determined using this test method without dilution. However, no precision and bias data are available for concentrations greater than 5.0 mg/L. This test method was tested on reagent, natural, and potable waters. It is the user's responsibility to ensure the validity of this test method for waters of untested matrices.

Applicable Concentration Range

0.5 - 5.0 mg/L

Interferences

Aluminum ionizes slightly in the nitrous oxide-acetylene flame, but the addition of sodium chloride described in this test method suppresses this interference. By this technique, a maximum concentration of 9000 mg/L sodium, 9000 mg/L potassium, 4000 mg/L calcium, 4000 mg/L magnesium, 9000 mg/L sulfate, 9000 mg/L chloride, 9000 mg/L nitrate, and 9000 mg/L iron may be tolerated.

Quality Control Requirements

Sample Handling

Collect samples in accordance with Practices D 1066 or D 3370, as applicable. For dissolved aluminum, filter the samples at the time of collection through a 0.45-um filter. Acidify the filtrate to pH 2 or less with nitric acid. For total recoverable aluminum, acidify the unfiltered sample to pH 2 or less at the time of collection.

Maximum Holding Time

The holding time for samples may be calculated in accordance with Practice D 4841.

Relative Cost

Unknown

Sample Preparation Methods

This method has 1 analyte associated with it.

Analyte	Detection Level	Bias	Precision	Pct False Positive	Pct False Negative	Spiking Level
Aluminum(7429-90-5) Al Aluminium Aluminum Aluminum (fume or dust) Aluminum powder	0.500 mg/L	113% Rec (ML)	19.70 % RSD (ML)			0.80 mg/L

Precision Descriptor Notes:	The collaborative test of the direct atomic absorption test method for aluminum in reagent water was performed at three levels by four laboratories (seven operators) making a total of fifteen observations at each level. The test in matrix water at the same levels was performed by three laboratories (six operators) making a total of twelve observations at each level.
Detection Level Note:	None.

Revision	PDF/Link
1995

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ASTM: D857: Aluminum by FLAA

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