OSHA Method ID-198sg: Aluminum Oxide in Workplace Atmospheres
Aluminum Oxide in Workplace Atmospheres 1. Introduction This method describes the collection on a 0.80 m AA filter and analysis using Atomic Absorption Spectroscopy of Aluminum Oxide (Al203). The method measures the total concentration of Al203 as aluminum.
Originally, aluminum oxide samples were collected on an AA filter, digested by acid digestion, and analyzed by AAS. This procedure was abandoned when it was found to give low recoveries. Prior to the use of this method, Al203 was collected on PVC filters, weighted, and sent to the lab only if the sample weight allowed the sample to be over the standard. The filters were digested using a borate fusion and analyzed by AAS. There is no significant difference between the means of the found/theoretical values of the microwave and the borate fusion digestions at a 95% confidence level (See Appendix I).
1.2. Uses (9.1.)
About 90% of aluminum oxide is used in the production of aluminum metal. The remainder is used in applications such as flame retardant filters, preparation of aluminum compounds, pigments, absorbants, catalysts, ceramics, refectories, and abrasives.