Determination of phosphorus in sediments by graphite furnace AAS

Abstract

Simple and rapid determination of phosphorus in sediment was studied by graphite furnace (GF) AAS using a phosphorus hollow cathode lamp (P-HCL). A Zr-treated graphite tube was used for GF. For each analytical procedure a 20 mm3 of 1% Zr solution was injected into the graphite tube and then a 10 mm3 of sample solution containing P was injected. Digestion procedure was as follows: The sediment sample of 0.2 g was decomposed with HNO3-HClO4-HF, then the digest was evaporated to dryness. The residue was dissolved with 3 cm3 6 M HCl, and diluted to 50 cm3, and P was determined by GF-AAS. All the values obtained by the proposed method agree well with the reference value (Pond sediment, NIES No. 2) and those by Molybdenum Blue spectrometry (River sediment and Submarine sediment). © 1988, The Japan Society for Analytical Chemistry. All rights reserved.