用大气压化学电离质谱分析及表征二烷基二硫代磷酸锌

ANALYSIS AND CHARACTERIZATION OF ZINC DIALKYL DITHIOPHOSPHATE BY APCI/MS TECHNoLOGY

采用大气压化学电离质谱技术(简称APCI/MS)对润滑油抗氧抗腐蚀添加剂丁基、辛基混合烷基硫磷酸锌进行了分析,利用该技术可直接获得被测物的准分子离子峰,确定各化合物的相对分子质量。结合APCI/MS的源内化学电离检测技术可得到样品的碎片离子峰,便于进一步结构表征。该方法简单、快速,与传统分析方法相比具有优越之处。

An effective method for analysis and characterization of zinc dialkyl (butyl and oc-tyl) dithiophosphate lubricant additive, utilizing atmosphere pressure chemical ionization/mass spec-trometry (APCI/MS), has been developed. The peaks of molecular ion and quasi-molecular ion can bedetected by the said technology and the relative molecular weight of the compound can be obtained. Thepeak of ion fragments can be detected by the means of programmable in-source CID for further characte-rized. The results showed that the said method has the advantages of rapid and convenient comparingwith the traditional analysis method.