Should acid ammonium oxalate replace hydroxylammonium chloride in step 2 of the revised BCR sequential extraction protocol for soil and sediment?

• Published in: Analytica chimica acta Vol. 508; no. 2; pp. 193 - 199
• Main Authors: Davidson, Christine M, Hursthouse, Andrew S, Tognarelli, Donna M, Ure, Allan M, Urquhart, Graham J
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.04.2004; Elsevier
• Subjects: Acid ammonium oxalate; Analytical chemistry; BCR; Chemistry; Exact sciences and technology; Heavy metal analysis; Sequential extraction; Soil; Spectrometric and optical methods; BCR; Soil; Heavy metal analysis; Sequential extraction; Acid ammonium oxalate; Fractionation; Protocols; Calcium; Atomic emission spectrometry; Iron; Inductive coupling plasma spectrometry; Sediments; Flame spectrometry; Zinc; Heavy metal; Soils; Sample preparation; Ammonium Oxalate; Lead; Thermoelectric atomization; Copper; Manganese; Atomic absorption spectrometry

The revised, four-step BCR sequential extraction for soil or sediment has been compared with an alternative procedure in which 0.2 mol l −1 ammonium oxalate (pH 3) replaced 0.5 mol l −1 hydroxylammonium chloride (pH 1.5) in step 2, the reducible step. A variety of substrates were studied: BCR CRM601...