Acid volatile sulfide determination in sediments using elemental analyzer with thermal conductivity detector.

摘要

A method for the determination of acid volatile sulfides (AVS) in sediments, using a common elemental analyser with thermal conductivity detector, is proposed. The method uses a mixture of Sn and V2O5 for pyrolysis and combustion to determine totalsulfur (TS), and non volatile sulfur (NVS), after an acidic attack. AVS is calculated as the difference between TS and NVS. The method for TS was validated by analysing a certified reference material. The recovery in the determination of acid volatile sulfide was determined by spiking a river sediment with ZnS. The method is accurate and gives a good reproducibility, recovering 97.7-99.6% of the sulfur in the 0-3% total sulfur content, with a s.d. of～0.015%.