Systematic Study of Boron Determination by Graphite Furnace Atomic Absorption Spectrometry.

Abstract

The optimized measurement of boron using graphite furnace atomic absorption spectrometry with a Zeeman effect background correction is described. Matrix modification and pretreatment. of graphite furnace were studied in an effort to improve the sensitivity and the elimination of memory effects. Based on this study, the tolerable ashing temperature was raised to 2100°C in the presence of matrix modifier, and the interferences from diverse elements were eliminated. The proposed method was applied for the determination of urinary boron. Recoveries of boron added to urine sample ranged from 95 to 98%;relative standard deviation were within 10% at the 10mg/l level. Boron contents determined by the proposed method ranged from <1.0 - 7.7 mg/l.