Determination of aluminum by four analytical methods

Technical Report · Sat Nov 01 04:00:00 EST 1975

DOI:https://doi.org/10.2172/7308847· OSTI ID:7308847

Hanson, T. J.; Smetana, K. M.

Four procedures have been developed for determining the aluminum concentration in basic matrices. Atomic Absorption Spectroscopy (AAS) was the routine method of analysis. Citrate was required to complex the aluminum and eliminate matrix effects. AAS was the least accurate of the four methods studied and was adversely affected by high aluminum concentrations. The Fluoride Electrode Method was the most accurate and precise of the four methods. A Gran's Plot determination was used to determine the end point and average standard recovery was 100% +- 2%. The Thermometric Titration Method was the fastest method for determining aluminum and could also determine hydroxide concentration at the same time. Standard recoveries were 100% +- 5%. The pH Electrode Method also measures aluminum and hydroxide content simultaneously, but is less accurate and more time consuming that the thermal titration. Samples were analyzed using all four methods and results were compared to determine the strengths and weaknesses of each. On the basis of these comparisons, conclusions were drawn concerning the application of each method to our laboratory needs.

• Research Organization: Atlantic Richfield Hanford Co., Richland, WA (USA)
• OSTI ID: 7308847
• Report Number(s): ARH-ST-131
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400104* -- Spectral Procedures-- (-1987)
ABSORPTION SPECTROSCOPY
ACCURACY
ALUMINIUM
CHEMICAL ANALYSIS
ELEMENTS
ION SELECTIVE ELECTRODE ANALYSIS
MANAGEMENT
METALS
PROCESSING
QUANTITATIVE CHEMICAL ANALYSIS
RADIOACTIVE WASTE PROCESSING
SPECTROSCOPY
TITRATION
WASTE MANAGEMENT
WASTE PROCESSING