Letter | Published:

Blowpipe Analysis

Naturevolume 13page208 (1876) | Download Citation

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Abstract

MAJOR Ross (NATURE, vol. xiii. p. 186) does not appear to have thought of the impurities his soda might contain in his test for the presence of a sulphide. Had he done so he would probably have remembered that all soda (unless specially prepare; from sodium) contains traces of iron. This iron, on fusing with the sulphide, forms ferrous sulphide, which, as is well known, soluble in fused sodium sulphide; and on adding water to the fused mass a black residue of ferrous sulphide remains behind.

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  1. Search for T. S. HUMPIDGE in:

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https://doi.org/10.1038/013208a0

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