紫菜干污染霉菌菌相调查分析及限量标准建议

An Investigation on Pullution of Mold Fungus in laver for Consumption

对福建省沿海主要产地生产的和市售紫菜干的霉菌污染情况进行采样调查。５３件检样的霉菌检出率为１００％，数量为＜５～１．２×１０４ＣＦＵ／ｇ。采自产地的新鲜紫菜干中霉菌数量较少，其中的优势霉菌为镰刀菌，这些“田野霉”是常见的植物原生菌群。市售紫菜干中霉菌数量较多，优势菌群演替为华丽曲霉、黑曲霉、杂色曲霉等“贮藏霉”。说明市售品主要在运输、贮藏、销售环节受到污染。建议国家标准限定紫菜干霉菌计数为≤２．０×１０２ＣＦＵ／ｇ。

Study on the mycoflora in dried products of laver was carried out. Fifty three samples of dried laver were collected from its main producing area on the coastland of Fujian and from the markets. The fungal colony counts were determined on rose bengal agar plates incubated at 27℃ and moulds were classified. Mould was found in all the samples shown 100％ positive with total counts ranging from ＜5～1.2×10４CFU/ｇ-1. In the fresh samples collecting from the producing area, fungal quantity was lower and Fusarium was the genus found most frequently. This field mould is the commonly autochthonous flora of plant. The dried lavers obtained at the market stage yielded greater counts. Asperｇillus ornatus, A. niger, A. versicolor etc. were the dominan tgroup. They are common storage mould. It was believed that the contamination of these moulds was a result of improper storage, transportation and sale. It suggests a maximun guideline of mould count of 2.0×10２ CFU/ｇ－1 in dried products of laver.