平台石墨炉原子吸收法直接测定肉类中铅——应用超低温制悬乳浊液与基体改进剂技术

本文提出了一种简便、快速测定肉类中铅的方法， 采用不经常规消化， 以液氮低温处理样品， 加基体改进剂（０－８ ％ ＮＨ４ Ｈ２ＰＯ４ － ０ ． ５ ％ 抗坏血酸———０－５％ Ｔｗｅｅｎ８０） 后制成均匀、稳定的悬乳浊液直接进样， 并在自制的石墨炉平台中进行测定。有效地提高了灰化温度和原子化效率， 消除了背景干扰。回收率在９７－３ ％ ～１０５－７ ％ 之间， 相对标准偏差≤７－４ ％ ， 与国家标准方法能很好相符。

Direct Determination of Lean in Meat by L'vov Platform GFAA——Application The technique of Preparation Levitation by Low Temperature and Matrix Modifier

This paper describes a simper and rapid method for the direct determinationof Pb in meat by L'vov platform graphite furnace AAS. A matrix modifier(NH 4H 2PO 4 Vitamin C Tween 80) and preparation levitation by low temperature technique were applied to raise the charring temperature (950℃). The method is simpler and less contamination from regents than others using GFAAS. The method gives recoveries of 97.3%-105.7%, and relative standard deviatior of 5.2%-7.4%. GB/T 5009.12-1996 method and this method to measure same meat samples is in good agreement.