Studies On Controlling Cd,Methamidophos And SO₂ Of Tremella Fuciformis

Food safety is an outstanding problem in Tremella fuciformis production. People paid more attention to non-polluted product in our world, and some countries and regions have refused to import contaminated farm product. The industry of Tremella fuciformis in GuTian has faced a severe challenge.The objectives of this paper were investigating the safety quality problem of Tremella fuciformis. Research was started with general investigation about Tremella fuciformis. After testing these 14 properties (including Pb, Cd, As, Hg, 666, D. D. T, dichlorvos, methamidophos, omethoate, monocrotophos, malathion, carbendazim, formaldehyde and S0₂),the results showed that the quantity of Cd, methamidophos and S0₂ were over the food safety standard .The results of tracing experiment showed that: (l)The content of Cd in culture material is beyond 0. 05mg. kg^-1, and from the stage of product to the stage of harvest the content of Cd changed greatly. So the excess of Cd in Tremella fuciformis mainly came from cotton seed hull.(2)Additive experiment indicated: Sterilization can degrade some methamidophos in culture material, along with the growth of Tremella fuciformis more and more methamidophos were degraded, when in harvest there were only a few methamidophos left. In spraying pesticide experiment we found that : the use of high toxic and a great deal of methamidophos in Tremella fuciformis production that results in over standard residue of the pesticide in Tremella fuciformis products.(3) It was a long history for the use of Sulfur to suffocate Tremella fuciformis. Though sulfur suffocation raise Tremella...