Affordable Access

Publisher Website

A method for simultaneous determination of H2s and SO2in flue gases

Atmospheric Environment (1967)
Publication Date
DOI: 10.1016/0004-6981(69)90060-2


Abstract A discontinuous method has been developed for the simultaneous determination of H 2S and SO 2 in flue gases. The method is based on a pure gas phase separation whereby H 2S is adsorbed on a silica gel column impregnated with silver-sulphate (Ag 2SO 4) and potassium-hydrogensulphate (KHSO 4), while SO 2 is subsequently absorbed in a wash-bottle containing a slightly acidic hydrogen peroxide solution. Owing to the acid properties of the impregnated gel, SO 2 passes through the column. The experiments show that the penetration of SO 2 is quantitative while H 2S is adsorbed quantitatively on the column. The method permits the determination of amounts of H 2S in the range of 1–1500 mgNm −3 with a sampling time of 5 min and a gas flow of 0.2–4.0 1. min −1. The lower limit for the determination of SO 2 under the above conditions lies at about 1 mgNm −3. The separation of H 2S and SO 2 is not influenced by the presence of moderate amounts of water but the interference of ammonia is more serious. Ammonia is adsorbed on the column and the properties of the gel are changed so that SO 2 is also adsorbed. The method is still however, valid for H 2S. The interference from organic sulphur compounds is negligible with the procedure. Hitherto the method has successfully been used to analyse H 2S in ambient air in the ppb-range as 24-hr mean values.

There are no comments yet on this publication. Be the first to share your thoughts.


Seen <100 times

More articles like this

Comments on a modified tutwiler method for the det...

on Analytica Chimica Acta Jan 01, 1956

A 72 percent H2SO4 method for the determination of...

on Journal of animal science August 1946

Experimental determination of the H2SO4/(NH4)2SO4/...

on The Journal of Physical Chemis... Jan 25, 2007

H2solved by the finite element method

on Chemical Physics Letters Jan 01, 1987
More articles like this..