在NaCl和SCN^-存在下浮选铜(Ⅱ)间接测定十六烷基三甲基溴化铵  

Indirect determination of CTMAB with sodium chloride and ammonium thiocyanate by floatation and separation of copper

作　　者：王春风[1] 孙东[2] 李全民[3] 

机构地区：[1]河南师范大学生命科学学院,新乡453007 [2]新乡职业技术学院,新乡453002 [3]河南师范大学化学与环境科学学院,新乡453007

出　　处：《分析试验室》2010年第1期54-56,共3页Chinese Journal of Analysis Laboratory

基　　金：河南省创新人才工程项目(教高[2001]513号)项目资助

摘　　要：研究了NaCl和NH4SCN浮选Cu(Ⅱ)间接测定十六烷基三甲基溴化铵的新方法。在水溶液中,Cu(Ⅱ)与SCN-和CTMAB缔合生成沉淀,在NaCl存在下,此沉淀被浮选。实验表明,Cu(Ⅱ)的浮选率与CTMAB的量在3.6~54.7 mg/L范围内呈良好的线性关系。CTMAB的检出限为1.8μg/mL。方法已用于合成水样和自来水中CTMAB的测定。A new method for the indirect determination of cetryl-trimethyl ammonium bromide（CTMAB） with NaCl and NH4SCN by floatation and separation of Cu（Ⅱ） has been studied.The study shows Cu（Ⅱ） can associate with SCN-and CTMAB to form an insoluble ternary ion-association complex,and the precipitate can float on the surface of the liquid phase.A good linear relationship is observed between the floatation yield（E%） of Cu（Ⅱ） and the amount of CTMAB.The detection limit for CTMAB is 1.8 μg/mL,and a linear range is 3.6～54.7mg/L.The method is simpie, rapid, reliable and nontoxic. The developed method can be applied to the indirect determination of CTMAB in synthetic samples and tap water with satisfactory results.

关 键 词：十六烷基三甲基溴化铵 NH4SCN NACL 

分 类 号：O657.3[理学—分析化学]