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ISO 8151:1987 Dried milk -- Determination of nitrate content -- Method by cadmium reduction and spectrometry (Screening method)
standard by International Organization for Standardization, 03/01/1987
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Describes a method, the principle of which consists in dissolving the dried milk in water, precipitating the fat and proteins, filtering and reducing the nitrate to nitrite in a portion of the filtrate by means of zinc powder and cadmium ion.