摘要
用消解乳化技术处理氯丁橡胶样品,即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TritonX 100或OP乳化成乳浊液。以原子吸收法测定镁、锌,以原子发射法测定钠、钾,建立了快速测定氯丁橡胶中钠、钾、镁、锌的火焰原子光谱法(FAS)法。分别以硝酸钾、Ba2+作为钠、钾的消电离剂。对样品处理方法、溶剂及乳化剂的选择、试液与空白溶液粘度的一致性、各种干扰及检出限进行了考察。测定结果的相对标准偏差<1.5%,加标回收率99.5%～103 0%。
A digestion emulsification technology for chloroprene rubber sample was adopted in the FAS determination. The sample was first digested in concentrated nitric acid, and then the digested product of the sample was dissolved in mixed solvent of ethyl alcohol-methyl isobutyl ketone and was emulsified into emulsion with emulsifier Triton X-100 or OP. The determination of magnesium and zinc were performed by FAAS and the determination of sodium and potassium were performed by FAES. KNO_3 and Ba were served as the deionization agent for sodium and potassium,respectively. The pretreatment method of chloroprene rubber sample, choices of solvent and emulsifier, identity of viscosity for test solution and for blank solution, interferences and detection limit were studied. The relative standard deviations were less than 1.5%. The recoveries were 99.5%～103.0%.
出处
《分析试验室》
CAS
CSCD
北大核心
2004年第4期45-48,共4页
Chinese Journal of Analysis Laboratory
关键词
火焰原子光谱法
消解乳化技术
氯丁橡胶
钾
镁
锌
钠
橡胶工业
微量元素
Flame atomic spectrometry(FAS)
Digestion emulsification technology
Chloroprene rubber
Sodium
Potassium
Magnesium
Zinc
