Elimination of nitrate interference in the trace détermination of sulphate as hydrogen sulphide.
The microdetermination of sulphate by reduction to hydrogen sulphide, determined colorimetrically as Methylene Blue, is subject to interference from nitrate ion. This interference is eliminated by adding zinc acetate and igniting samples at 320 degrees for one hr.
Sinclair
A
A
Allied Breweries Research Department, Burton on Trent, U.K.
Hall
R D
RD
Burns
D T
DT
Hayes
W P
WP