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建立了测定黄曲霉毒素M_1的ELISA直接竞争法,其方法灵敏度为0.08ng/g。用该法测定了我国市售的乳粉97份,样品阳性率为84.5%,超标率(>0.5ng/g)为39.2%;阳性样品含量范围为0.08～4.16ng/g,调查结果证明我国南方生产的乳粉污染黄曲霉毒素M_1较严重。
A direct competition ELISA method for the determination of aflatoxin M_1 was established and its sensitivity was 0.08 ng / g. Using this method, 97 samples of milk powder were tested in our country. The positive rate of sample was 84.5%, the rate of over-standard (> 0.5ng / g) was 39.2%, the content of positive sample was 0.08 ~ 4.16ng / g. Aflatoxin M_1 polluted by southern milk powder is more serious.