2005年东莞市食用菌甲醛含量抽查结果分析

目的了解东莞市农贸市场食用菌中甲醛的残留情况。方法对东莞市32个镇区35个农贸市场进行抽查。共抽查130份食用菌,其中干香菇56份,银耳58份,木耳14份,茶树菇2份。结果在干香菇中甲醛检出率100%,平均值164 mg/kg。可能是香菇中甲醛本底值高和生产环节中的工艺所致。木耳、银耳和茶树菇中未检出甲醛。结论食用菌中甲醛的存在有多种因素,在监督中应慎下结论。

Formaldehyde Content in Dried Edible Fungi from Dongguan Market

Objective To know about the formaldehyde pollution in the edible fungi sold in the market of Dongguan in 2005.Method 130 batches of 4 kinds of edible fungi were randomly collected from the 35 wholesale markets of 32 towns of Dongguan,including 56 batches of xiang mushroom,58 batches of tremella,14 batches of Auricularia auricular-judae and 2 batches of Agrocybe aegerita.Results It was found that the positive rate of formaldehyde in the dried xianggu mushroom was 100% and the average content of formaldehyde was 164 mg/kg.It was speculated that two possible factors may be responsible for this case: first,the high background value of formaldehyde in the mushroom;second,the formaldehyde introduced by processing.No formaldehyde was found in the other 3 kinds of edible fungi.Conclusion Many factors influence the formaldehyde content in the edible fungi.Any conclusion during intendance should be made cautiously.