中文摘要：

建立了高温氯盐法处理含铅锡物料时高铅氯盐溶液中锡的测定方法.研究发现,在草酸盐酸亚甲基蓝的底液中,Sn（Ⅳ）在 0.5V处有一灵敏的极谱波,Sn（Ⅳ）与pb2＋、Cd2＋峰电位相隔100mV,可以利用微分脉冲伏安极谱法测定锡.对于0.25 mg/L的锡,至少1 000倍的Cl、Na＋、K＋、F、SO42-、NO3-,200倍Cu2＋、Fe3＋、Zn2＋、Al3＋、Mn2＋,100倍Ca2＋、Mg2＋、Cr3＋、Sb3＋、Bi3＋,50倍Ni2＋、Co2＋,30倍As3＋、Pb2＋、Cd2＋不干扰测定.在选定试验条件下,采用标准加入法对样品进行测定,测定值相对标准偏差小于2％,回收率在98.8％～104.2％之间.方法可应用于高铅氯盐溶液中锡的测定.

英文摘要：

A method for the determination of tin was established in high-lead chloride salt solution. The solution was produced in precessing the lead-tin materials by high temperature chloride salt method. A sensitive polarographic wave of Sn（IV） was found at -0.5 V during the determination of tin in oxalic acid-hydrochloric acid-methylene blue solution by differential pulse voltammetry polarography. The overlapping of peak position of Pb2＋ , Cd2＋ with Sn4＋ was solved. The results shown that the peak position of Sn4＋ was separated from Pb2＋ and Cd2＋ and the gap was about 100 mV. For the determination of 0.25 mg/L Sn4＋ in high-lead chloride salt solution,1 000 times of Cl-, Na＋ , K＋ , F-, SO4-, NO3- ; 200 times of Cu2＋ , Fe3＋ , Zn2＋ , Al3＋ , Mn2＋ ; 100 times of Ca2＋ , Mg2＋ , Cr3＋ , Sb3＋ , Bi3＋ ; 50 times of Ni2＋ , Co2＋ ; 30 times of As3＋ , Pb2＋ and Cd2＋ did not interfere in the determination at least. Under the optimum experimental conditions, the sample was determined with standard addition method,with the relative standard deviation of 2% and the recovery of 98.8%-104.2%. The proposed method could be applied to determine tin in high-lead chloride salt solution.