COLORIMETRIC DETERMINATION OF TRACE METALS IN BEER AND IN BREWING MATERIALS

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Abstract
The methods described for the wet oxidation of beer, wort, malt, barley, barley flakes, malt combings, hops, pressed and dried yeast, isinglass, and coal have proved satisfactory and time-saving over a number of years. They involve digestion with nitric and sulphuric adds under conditions which preclude loss of the metal sought (Zn, Pb, Cu, Fe, Mn, Ni, As), and are at the same time simple and safe in execution and economical of reagents.

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