碱性锌-镍合金镀液及镀层中锌-镍的测定

　　文章编号:1001-3849(2005)01-0043-03　y　碱性锌-镍合金镀液及镀层中锌、镍的测定侯　燕(湖南省矿产测试利用研究所,湖南长沙　410007)摘要:酸性锌-镍合金镀液中锌、镍的测定方法报道很多,而碱性镀液中锌、镍的测定报道很少。采用过硫酸铵作氧化剂,在碱性介质中,镍与丁二酮肟生成红色络合物借此比色,求出镍含量;用EDTA滴定法确定锌、镍总量,然后减去镍量从中得到锌含量。此方法也可用于镀层中的锌及镍测定。本方法测定结果准确、快速,能满足实际生产的要求。关　键　词:锌-镍合金;分析;镀液;镀层中图分类号:TG115.32;TG115.313　　　文献标识码:A　DeterminationofZincandNickelinAlkalineZinc-NickelAlloyPlatingBath　HOUYan(InstituteforTestingandUtilizationofMineralsofHunan,Changsha　410007,China)Abstract:WhilealargenumberofmethodsofdeterminingcontentsofZnandNiinacidicZn-Nialloyplatingbathwasreported,fewofmethodsfordeterminingZnandNiinalkalineZn-Nialloyplatingbathwerereported.With(NH4)2S2O4asoxidant,aredcomplexwasresultedfromNiandC4H8N2O2inalkalinesolution,Nicontentwasdeterminedbycolorimetry;andZncontentwascalculatedbysubtractingNicontentfromthetotalcontentofZnandNiwhichwasdeterminedthroughusingEDTAtitration.ThismethodcanalsobeusedinthedeterminationofcontentsofZnandNiinZn-Nialloycoating.Beingaccurateandfast,thismethodcanmeetthedemandsofpractical