摘要
为研究两亲分子自组合的弱相互作用,在LKB-8700精密量热系统的基础上设计和建立了精密半微量滴定热量计.实验数据的采集和处理由在线微机自动完成.利用本热量计测定量热基准物质三羟甲基氨基甲烷(Tris)和盐酸的反应热,实验结果与文献值一致,精度为±0.2％.对阴离子表面活性剂十二烷基硫酸钠(SDS),阳离子表面活性剂十二烷基三甲基溴化铵(DTAB)和非离子表面活性剂Triton X-100的胶束生成焓和临界胶束浓度(cmc)的测定结果也与文献报道值一致.
A precision semimicro - titration calorimeter was designed and established on the basis of LKB -8700 precision calorimetry system for studying the weak interactions between amphiphilic molecules. On - line collection of the data could be done automatically by a microcomputer. The reaction heat of trihydroxymethyl -aminomethane (Tris) , as a calorimetric standard substance, and hydrochloric acid was determined with an accuracy of ±0.2%. The results agree well with the literature values. The measured micellization enthalpies and critical micelle concentrations ( cmc s) of sodium dodecyl sulfate ( SDS) , dodecyltrimethyl - ammonium bromide (DTAB) and Triton X- 100 are also consistent with literature values.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2000年第9期1103-1106,共4页
Acta Chimica Sinica
基金
中国科学院和国家自然科学基金(29633020)
关键词
滴定热量计
临界胶束浓度
胶束
生成焓
测定
titration calorimeter, surfactant, critical micelle concentration, micellization enthalpy
