镧涂层塞曼效应石墨炉原子吸收法测定铜基合金中微量锡

Determination of Micro Amount of Tinin Copper Alloys with Zeeman GraphiteFurnace Atomic Absorption Spectropho-tometry and La-Coating Technique

本文采用塞曼石墨炉原子吸收法结合石墨管涂镧技术测定了铜基合金中微量锡。文章对比了涂镧管与非涂镧管测定锡时的原子化曲线，对于镧涂层对实验结果的影响及酒石酸的作用进行了讨论，提出了铜化合物可能在管内起到催化作用的观点。实际样品测定相对标准偏差为４．４％，加标回收率１０１％。

n this article,Sn in copper alloys wasdetermined by Zeeman GFAAS with La-coating technique,The atomization curvesof Sn from La-coated tubes and noncoatedtubes were compared,the effects of La-coating and the addition of tartaric acid inthis experiment were discussed,and thepoint was given that as a catalyst,La com-pound changed the process of Sn atomiza-tion.The RSD was 4.4%and the recoverywas 101%in the determination of Sn in Cu-Sn alloys.