Atomic Absorption Spectrophotometric Methods for the Determination of Phosphorous and Silicon in Steel.

摘要

Several methods for the determination of phosphorus in steel by graphite furnace atomic absorption spectrophotometry (GFAA) have been put forth in the literature. The most promising of these procedures are evaluated and optimized parameters for this analysis are given. The methods evaluated are those involving zirconium carbide furnace tubes, chemical matrix modification with La, the use of the method of additions and calibration via NBS standards. Similarly, an overview of flame AA (FAA) methods for Si determination is given. An overall procedure is described which allows the GFAA determination of phosphorus (0.010 - 0.100%), with matrix modification using lanthanum and FAA determination of silicon (0.1 - 1%) and metal constituents in steel from a single sample dissolution using NBS steels as calibration standards. (ERA citation 09:008125)