Zeeman Effect Electrothermal Atomic Absorption of Arsenic with Platinum as a Matrix Modifier

Abstract

Since the charring temperature of As in environmental samples can be raised to 1320°C with Pt, the sensitivity of determining As by ET-AAS is increased about 50% using Ni salt as a matrix modifier. The interference of most foreign ions is avoided, but PO^[dbnd] and SO^[tbnd] cause a depression and F^? and SiO^[dbnd] produce an enhancement of the As absorption. The method has been applied to pollution control and river sediment samples with satisfactory results.