Zhang Min, Shi Zhen, Bai Yinjuan, Gao Yong, Hu Rongzu, Zhao Fenqi
Department of Chemistry, Northwest University, Shaanxi Xi'an, China.
J Am Soc Mass Spectrom. 2006 Feb;17(2):189-93. doi: 10.1016/j.jasms.2005.10.005. Epub 2006 Jan 10.
This study presents a novel method for determining the molecular weights of low molecular weight (MW) energetic compounds through their complexes of beta-cyclodextrin (beta-CD) and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) in a mass range of 500 to 1700 Da, avoiding matrix interference. The MWs of one composite explosive composed of 2,6-DNT, TNT, and RDX, one propellant with unknown components, and 14 single-compound explosives (RDX, HMX, 3,4-DNT, 2,6-DNT, 2,5-DNT, 2,4,6-TNT, TNAZ, DNI, BTTN, NG, TO, NTO, NP, and 662) were measured. The molecular recognition and inclusion behavior of beta-CD to energetic materials (EMs) were investigated. The results show that (1) the established method is sensitive, simple, accurate, and suitable for determining the MWs of low-MW single-compound explosives and energetic components in composite explosives and propellants; and (2) beta-CD has good inclusion and modular recognition abilities to the above EMs.
本研究提出了一种新颖的方法，用于通过β-环糊精（β-CD）复合物以及基质辅助激光解吸/电离飞行时间质谱（MALDI-TOF-MS）在500至1700 Da质量范围内测定低分子量（MW）含能化合物的分子量，避免了基质干扰。测定了一种由2,6-二硝基甲苯、三硝基甲苯和黑索今组成的复合炸药、一种成分未知的推进剂以及14种单组分炸药（黑索今、奥克托今、3,4-二硝基甲苯、2,6-二硝基甲苯、2,5-二硝基甲苯、2,4,6-三硝基甲苯、三硝基苯甲硝胺、二硝基咪唑、双(2,2,2-三硝基乙基)硝胺、硝化甘油、三羟甲基乙烷三硝酸酯、硝基胍、硝基脲以及662）的分子量。研究了β-CD对含能材料（EMs）的分子识别和包合行为。结果表明：（1）所建立的方法灵敏、简单、准确，适用于测定低分子量单组分炸药以及复合炸药和推进剂中含能组分的分子量；（2）β-CD对上述含能材料具有良好的包合和模式识别能力。
