底泥中酸性挥发硫及同步浸提金属的测定

DETERMINATION OF ACID VOLATILE SULFIDE AND SIMULTANEOUSLY EXTRACTED METALS IN SEDIMENT

同步浸提金属与酸性挥发硫的比值在判断底泥重金属生物毒性方面有重要意义．描述了一套测定底泥酸性挥发硫和同步浸提金属的仪器装置和分析程序．从气体流速、反应时间、酸浓度、硫含量等方面研究了酸性挥发硫测定的最适反应条件．在此条件下酸性挥发硫的测定回收率可达９０％以上．该方法的最低检出限为００２μｍｏｌ／ｇ（干泥）．

A method for analyzing AVS and SEM in sediment was developed.Optimum conditions,including gas flow,reaction time,acidity and sulfide amount are discussed.The recovery of AVS is more than 90% and the limit of determination is 0 02 μmol/g dry sediment.