Transactions of the INDIAN CERAMIC SOCIETY Vol. 61 2002
Estimation of Sulphide Sulphur in a Typical
Amber Glass - A Quality Control Check
Supriyo Dasgupta
Pages : 9-11
DOI : 10.1080/0371750X.2002.10800009
Abstract
A simple, rapid and direct estimation of sulphide sulphur in
amber glass has been developed. After decomposition of the
glass by hydrofluoric acid and hydrochloric acid in a polythene
vessel, the liberated hydrogen sulphide was swept out by a
stream of nitrogen and absorbed in 0.2 N potassium hydroxide
solution. The absorbed sulphide was then estimated by titration
with hydroxymercuribenzoic acid using dithizone as the
indicator. The analytical procedure was checked and the precision
was found to be within ± 0.002% S. The addition of zinc,
used in the decomposition step by the previous workers, was
completely eliminated. The interference of fluorides and
chlorides from acid fumes on the procedure was found to be
negligible. Total time taken for the analysis was 1.5 h. The lower
range of detection limit was 0.001% sulphide in glass with 1 g of
glass sample taken.
