示波极谱法快速测定金属锑中微量锡  

STUDY ON THE RAPID OSCILLOPOLAROGRAPHIC DETERMINATION OF TRACE TIN IN METALLIC ANTIMONY

作　　者：毛禹平 范丽汇 

机构地区：[1]云南省有色金属及制品质量监督检验站,昆明650031

出　　处：《理化检验（化学分册）》2000年第3期126-128,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：提出了一个快速测定金属锑中微量锡的新方法。在硫酸 -草酸 -次甲基蓝极谱吸附波体系中 ,利用锑自然水解沉淀与锡相分离以及反向极谱残锑不干扰锡测定的原理 ,直接测定了金属锑中 0 .0 0 0 x～ 0 .0 x%范围内的锡 ,效果良好。Sensitive polarographic adsorptive wave is observed due to the formation of an associate complex of Sn(Ⅵ) in a sulfuric acid oxalic acid medium containing methylene blue. A reverse oscillopolarographic method for the determination of trace amounts of tin in metallic antimony is proposed based on this phenomenon. In the above mentioned medium, antimony is precipitated by hydrolysis and its interference to the determination of tin is thus eliminated. The proposed method can be used to determine the content of tin in the range of 1×10 -4 %~1×10 -2 %, with satisfactory results.

关 键 词：示波极谱法 锡 金属锑 

分 类 号：TG146.18[一般工业技术—材料科学与工程] O614.432[金属学及工艺—金属材料]