Chemical sequential extraction for metal partitioning in environmental solid samples

A comprehensive review-of the sequential extraction schemes for metal fractionation in environmental samples (i.e., sediment, soil,. sewage sludge, fly ash; etc.) is presented. The review contains more than 400 references add covers principally the literature published over the last decade. The use of each reagent involved in these schemes is looked a critically, and guidelines for their selectivity and extraction capacity are given. The operational characier of these schemes is - emphasised. 'topics such as C'o M parability between selquer tial extraction schemes of widespread use, harmonisation, acceleration, validation, et. are addressed and future developments outlined.