摘要
本文提出了一种快速、灵敏和直接测定血清和水样中痕量铝的ＩＣＰ－ＡＥＳ方法。方法基于以聚四氟乙烯为氟化剂。促进铝在石墨炉中的蒸发。研究了铝的蒸发行为，考察了共存元素的干扰，提出了铝的蒸发机理。该法测定铝的检出限为０．５ｎｇ／ｍＬ，ＲＳＤ为２．２％（ｎ＝９，Ａｌ浓度为０．２μｇ／ｍＬ），线性范围达４个数量级。采用本法直接测定了血清和自来水中的痕量铝，其分析结果和标准参考物质标定值吻合很好。
A sensitive,rapid and accurate method for the di-rect determination of aluminium in waters and serumsamples has been developed.Polytetrafluoroethylene(PTFE) was used as the fluorinating agent to im-prove the vaporization of aluminium. The ICP dis-charge and ETV operating conditions were optimizedexperimentally.The interferences of coexisting ele-ments and fluorinating vaporization behavior of Alwere studied,and the fluorinating vaporization mecha-nism was proposed. The detection limit of this methodwas 0.5ng/mL and the RSD was 2.2%at the Al ofconcentration 0.2μg/mL. The proposed method hasbeen applied to the direct determination of Al in wa-ters and human serum samples. The resuIts obtainedare in good agreement with the reference results.
出处
《分析试验室》
CSCD
北大核心
1994年第2期16-19,共4页
Chinese Journal of Analysis Laboratory
关键词
电热蒸发
等离子体光谱
铝
血清
水
Electrothermal vaporization
plasmaspectrometry
aluminium determination
serum
wa-ters
polytetrafluoroethylene
