Raffke W, Wirthgen B
Nahrung. 1976;20(1):41-5.
By means of the method described, rapid semiquantitative mercury determinations may be performed without energy supply in cereals and cereal products. The mercury ions which are liberated by digestion with concentrated H2SO4 and KMnO4 are determined with the aid of a colorimetric method which is based on the formation of a coloured complex of mercury with di-beta-naphthyl-thiocarbazone. The method permits visual comparison of mercury concentrations ranging from 0.1 to 13 mug, revealing concentration differences up to 0,1 mug. The rate of recovery is 76%.
采用所述方法，无需能源供应即可对谷物和谷物制品进行快速半定量汞测定。用浓硫酸和高锰酸钾消化释放出的汞离子，借助基于汞与二-β-萘基硫代卡巴腙形成有色络合物的比色法进行测定。该方法允许对0.1至13微克范围内的汞浓度进行目视比较，可显示出高达0.1微克的浓度差异。回收率为76%。
