A VOLUMETRIC OR COLORIMETRIC DETERMINATION OF FES AND H2S IN SEDIMENTS BY OXIDATION TO SULFATE

Authors
GOLTERMAN HL
Citation
Hl. Golterman, A VOLUMETRIC OR COLORIMETRIC DETERMINATION OF FES AND H2S IN SEDIMENTS BY OXIDATION TO SULFATE, Hydrobiologia, 335(1), 1996, pp. 83-86
Citations number
2
Categorie Soggetti
Marine & Freshwater Biology
Journal title
Hydrobiologia → ACNP
ISSN journal
00188158
Volume
335
Issue
1
Year of publication
1996
Pages
83 - 86
Database
ISI
SICI code
0018-8158(1996)335:1<83:AVOCDO>2.0.ZU;2-Z
Abstract
A method has been developed for the determination of H2S and FeS in se diments. FeS is converted into H2S which is flushed from the samples d irectly into an excess of chlorine bleach, NaClO or KClO with some Zn2 + added. Either the excess can be titrated back potentiometrically wit h As2O3, or the sulphate formed can be measured colorimetrically. The precision is primarily controlled by the homogeneity of the sediment s uspensions and can be better than 99%.