摘要
本文研究了用平台加镧基体改进剂和塞曼扣除背景测定NBS1572(果叶),NBS1577a(牛肝),啤酒中的Pb,并对生物材料中几种主要成分的干扰及降低方法作了研究。结果表明:大部分基体在灰化阶段除去。基体改进剂使AA信号提前(果叶、牛肝)或推后(啤酒)。原子化温度稳定在2000℃,测定结果在证书值范围内。
Platform additive Lanthanum matrix modifier and Zeeman background correction methodwaa used for determination of lead in NBS-1572 (citrus leaves),NBS-1577a (bovine liver) andbeer. And method for elimination of interferences from major components of biological sampleswas also studied. The experimental results show: (1) most matrix can be eliminated duringsample ashing process, (2) matrix modifier makes the AA signal running ahead for citrusleaves and bovine liver and falling behind for beer, (3) when atomization temperature stabili-zed at 2000℃, results obtained are in consistent with the recommended value.
关键词
生物
样品
铅
原子吸收
Lead
graphite furance atomic absorption spectometry
