Friend, J. Newton (John Newton), 1881-1966 · London, New York : Longmans, Greens · leaf 51
enerally contains traces of sulphuretted hydrogen, although the bulk of this gas is removed at the gas works. The sensitiveness of lead acetate to the gas serves as a ready chemical test for sul¬ phuretted hydrogen. We have only to pour a few drops of lead acetate solution on to some filter paper… … This method is scarcely so sensitive as the preceding one, but has the advantage of removing the sulphuretted hydrogen completely, and a purer coal gas therefore escapes at B, which does not blacken lead acetate paper. We will now pass this purified coal gas, which consists very largely of…
Paint · Chemistry, Technical
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