A simplified sampling technique for use with the Weisz ring oven: application to qualitative analysis of some gold and silver alloys |
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Authors: | Ottendorfer L J Gawargious Y A Hassan S S |
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Affiliation: | Microanalytical Chemistry Unit, National Research Centre, Dokki, Cairo, United Arab Republic. |
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Abstract: | Up to 100 microg of sample can be collected from gold or silver alloys by rubbing the specimen with the ground hemispherical tip of a 4-mm Pyrex glass rod. Gold alloys are then dissolved in potassium cyanide solution containing hydrogen peroxide; silver alloys are exposed to vapours of nitric acid. Procedures for transfer, ring oven separation and identification of alloy constituents in the sample solutions are described. |
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