Inductively Coupled Plasma Mass Spectrometry Method For The Testing Of Heavy Metal And Controlling Measures And Principles For Importing Cassava Products

For the protecting of the quality of imported cassava products, related domestic commercial industry, based on the working practice for plant quality supervision and inspection and quarantine, the method, Inductively Coupled Plasma Mass Spectrometry (ICP-MS) with pre-treatment by means of microwave fermenting, for the testing of heavy metal in imported cassava products was developed and harvested progress. In this method, the correlative coefficients between the tested values of As, Cr, Cu, Sn and their true values were the same with 1. The correlative coefficients between the tested values of Zn, Hg, Pb, Cd and their true values are 0.9992, 0.9997, 0.9877, and 0.9990, respectively. The mean value of correlative coefficient was 0.9982. The lowest of detected values (LOD)of the tested elements were as following. Hg, Cd<0.001mg/kg. As, Pb, Cu, Zn, Sn<0.01mg/kg, and Cr<0.05mg/kg. The testing practice of this new method showed that it could test many kinds of heavy metals at the same time, with low LOD, high speed, accurate results. It is of great importance in quickening the clearing of custom. After reviewing the possible controlling measures and principles for importing cassava products, which is in accordance with WTO regulations, suggested that the standard for safety and clean, governmental permit system, inspecting for processing factory would be helpful and possible in controlling imported cassava products.