用消解乳化技术处理丁苯橡胶样品,先用浓硝酸消解样品,再用乙醇-甲基异丁基酮混合溶剂溶解消解产物,并用乳化剂Triton X-100乳化成乳浊液.以钡离子作为钠和钾的消电离剂,以空白溶液为参比,用工作曲线法测定,建立了快速测定丁苯橡胶中钠和钾的FAES法.对溶剂及乳化剂、试液与空白溶液粘度的一致性、干扰及检出限进行了考察.测定结果的相对标准偏差小于2.4%,加标回收率98.0%-104.7%.

In this paper a method for the determination of sodium and potassium in butadiene styrene rubber by digestion and emulsification-flame atomic emission spectrometry was reported.The sample was first digested with concentrated nitric acid,the digested product was then dissolved in a mixed solvent of ethyl alcohol-methyl isobutyl ketone and emulsified with emulsifier Triton X-100.Barium ion was used as deionization agent for the determination for sodium and potassium.The selection of solvent and emulsifier,the consistence of viscosity of test solution and blank solution,the interferences and the detection limits were studied.The relative standard deviations were found to be less than 2.4%.The recoveries obtained were in the range of 98.0%-104.7%.