锡茶罐中锡的迁移行为分析  

Migration Behavior of Tin in Tin Tea Pots

作　　者：王剑飞 李春江 刘胤璇 WANG Jianfei;LI Chunjiang;LIU Yinxuan(Honghe Center of Quality Su pervision and Insepection,Mengzi 661199,China)

机构地区：[1]红河州质量技术监督综合检测中心,蒙自661199

出　　处：《理化检验（化学分册）》2021年第1期15-19,共5页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：云南省质量技术监督局项目(2017ynzjkj11)。

摘　　要：用电感耦合等离子体原子发射光谱法(ICP-AES)研究2种不同锡含量的锡茶罐[1^(#)~5^(#)和6^(#)~10^(#)中锡质量分数分别为99%和97%(含重金属杂质铜和锑)]中锡的迁移行为。在3种迁移温度(25,40,70℃)下,将样品在3种模拟溶液[人造自来水、50%(体积分数,下同)乙醇溶液、5,10g·L^(-1)柠檬酸溶液]中浸泡不同时间,然后用ICP-AES测定浸泡液中锡的含量。在40℃下用人造自来水分别浸泡1^(#)~3^(#)和6^(#)~8^(#)样品8,24,72h,以考察锡在人造自来水中的迁移行为;在40℃下用50%乙醇溶液浸泡4^(#)、5^(#)、9^(#)、10^(#)样品8,24,72h,以考察锡在50%乙醇溶液中的迁移行为;在25℃下用5,10g·L^(-1)柠檬酸溶液浸泡1^(#)~3^(#)和6^(#)~8^(#)样品10,20,30,120,180,240,300,360,480,720,1440min,以考察锡在酸性溶液中的重复性迁移规律;在25,40,70℃下以10g·L^(-1)柠檬酸溶液浸泡1^(#)和6^(#)样品240min,以考察温度对锡在酸性溶液中迁移行为的影响。结果表明:(1)在人造自来水中,锡的迁移量不大于2.0mg·kg^(-1),迁移过程是一个较弱的离子交换的过程,影响迁移的主要因素为迁移时间和金属杂质;(2)锡在50%乙醇溶液中比较稳定,其迁移量可以忽略;(3)在柠檬酸溶液中,锡的迁移量较高,最高质量分数为215.70mg·kg-1,该过程是一个强耐腐蚀离子交换过程,主要影响因素为模拟溶液酸度、迁移时间、金属杂质和迁移温度。The migration behavior of tin in two types of tin tea pots with the different mass fractions of tin of99%(for samples of 1^(#)-5^(#))and 97%(for samples of 6^(#)-10^(#),containing heavy metal impurities of copper and antimony)was researched by ICP-AES.The samples were soaked in 3 types of simulated solution[artificial tap water,50%(volume fraction,the same below)ethanol solution,5,10 g·L^(-1) citric acid solution]for different times at 3 migration temperatures of 25,40,70℃,and the content of tin in soaking solution was determined by ICP-AES.Samples of 1^(#)-3^(#)and 6^(#)-8^(#)were soaked in artificial tap water at 40℃for 8,24,72 hto investigate the migration behavior of tin in artificial tap water;samples of 4^(#),5^(#),9^(#)and 10^(#)were soaked in 50%ethanol solution at 40℃for 8,24,72 hto investigate the migration behavior of tin in 50%ethanol solution;samples of 1^(#)-3^(#)and 6^(#)-8^(#)were soaked in 5,10 g·L^(-1) citric acid solution at room temperature for 10,20,30,120,180,240,300,360,480,720,1440 min to investigate the repeatability of tin′s migration in acidic solution;samples of 1^(#)and 6^(#)were soaked in 10 g·L^(-1) citric acid solution at 25,40,70℃for 240 min to investigate the effect of temperature on the migration behavior of tin in acid solution.The results showed that,(1)the migration of tin in artificial tap water was less than 2.0 mg·kg^(-1);and the migration process was a weak process of ion exchange,with the main influencing factors of migration of time and metal impurities;(2)tin was kept relatively stable in 50%ethanol solution,and its migration amount was negligible;(3)the migration amount of tin was high in citric acid solution,with the highest mass fraction of 215.70 mg·kg-1,and the migration process was an exchange process of strong corrosion-resistant ions,with its main influencing factors of the acidity of the simulated solution,migration time,metal impurities and migration temperature.

关 键 词：电感耦合等离子体原子发射光谱法 锡 迁移行为 锡茶罐 

分 类 号：O652.7[理学—分析化学]