【摘要】 采用直接分析和脱磺处理后分析的两种方法，分别测定润滑油清净分散剂──石油磺酸盐的分子量分布、平均分子量、烷基芳烃部分的结构等，并对两种不同方法所得结果进行比较。直接分析结果与脱磺处理后分析的结果基本一致，而分析的前处理工作大大简化。研究工作表明场解吸电离质谱、～1H核磁共振及反门控去偶的～13C核磁共振等分析方法和一些特殊实验技术用于直接分析石油磺酸盐是合理的，所得结果可靠。更多还原

【Abstract】 Two analytical methods were used to analyze petroleum sulphonates used as detergent-dispersant additive for lubricating oil,in which the samples were analyzed directly and after hydrolysed to the corresponding hydrocarbons respectively. The analytical results obtained from the one method involving distribution of molecular weight,average molecular weight,structure of hydrocarbon portion of the sulphonates and so on are the same as those obtained from the other. The pre-treatment of direct analysis is much easier than the other.The results indicated that the direct analytlcal method in which field desorption of mass spectrometry,1HNMR and inverse gated decoupling of 13CNMR used to analyze the samples is reasonable.更多还原