采用气相色谱-质谱法对六硝基芪纯度标准物质(简写作HNS)中易气化、热稳定性好的有机杂质(包括3,5-二溴吡啶、2,4,6-三硝基苯、2,4,6-三硝基甲苯及4,6-二硝基苯异唑等)进行结构鉴定。利用液相色谱-大气压化学电离源-质谱法对HNS中难气化,热稳定性差的杂质(主要是非极性较强的中间体二苦基乙烷,简写作DPE)作结构鉴定,并检测到HNS和DPE的特征加合离子。以上两方面的工作有效地测定了HNS中的有机杂质,为这些杂质的去除提供了依据,对制备HNS纯度标准物质具有重要意义。

GC-MS was applied to the identification of chemical structure of easily gasifiable and thermo-stable organic impurities (i.e., 3.5-dibromopyridine, 2,4,6-trinitrobenzene, 2,4,6-trinitrotoluene and 4,6-dinitrobenzoisoxazole) in the purity SRM of hexanitrostilbene (abbr. as HNS); and LC-MS with APCI was applied to the structural identification of hardly gasifiable and poorly thermo-stable impurities, especially the non-polar intermediate of 1,2-bis(2,4,6-trinitrophenyl) ethane, (abbr. as DPE). Characteristic adduct ions of HNS and DPE were also detected by LC-MS with APCI. Organic impurities in HNS were successfully determined by the above mentioned methods which gave a sound base to eliminate the impurities from HNS and was beneficial for preparation of the purity SRM.