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基质辅助激光解吸电离质谱(MALDI-MS)是一种高灵敏度、高通量、多组分同时分析的软电离质谱技术,可通过对物质分析实现分子结构的确认及物质分布信息的获取,因此在指纹分析中获得越来越多的关注。 本文从条件优化入手,讲述基质优化过程。 接着介绍了MALDI-MS成像(MALDI-MSI)在指纹分析领域具体的应用,在形态分析研究方面,总结其与常规显现方法联用对成像效果的影响、对疑难指纹的图像处理;在化学信息分析研究方面,分别从根据质谱信息分析生活习惯/案前活动、指纹遗留时间和个体同一认定对各研究的优点及局限性进行评述,最后为MALDI-MSI在指纹领域未来发展提出展望。 相似文献
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代莉莉 《分析测试技术与仪器》2022,28(4):375-383
基质辅助激光解析电离飞行时间质谱(MALDI-TOF-MS)在合成聚合物的表征手段中具有不可替代的优点,可以提供聚合物的质量分布、嵌段长度、端基等信息.但由于合成聚合物的离子化效率通常不佳,因此样品制备是分析成功的关键.从基质、基质添加剂以及混样方式3个方面综述了MALDI-TOF质谱分析合成聚合物样品制备的研究进展. 相似文献
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Sonic-spray ionization (SSI) is a previously developed soft ionization technique which does not need auxiliary methods such as voltage, heating, laser, or corona discharge. Spray ionization can be achieved under normal temperature and atmospheric pressure by inputting high-speed gas coaxial within the capillary. As an atmospheric pressure ion source, this technique was widely used as the interface of liquid chromatography-mass spectrometry at the beginning of its development. Based on the principles of sonic-spray ionization, a variety of easy ambient sonic-spray ionization derived techniques have been developed, which can be used for the in-situ, rapid and real-time analysis of samples with little or without any sample pretreatment. In this paper, the principless and characteristics of sonic-spray ionization were elaborated, and the progress of its application in life sciences, food safety, forensic chemistry, reaction monitoring, and other related fields were summarized. 相似文献
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基体辅助激光解吸/电离质谱(MALDIMS)法自80年代末由Karas,Hilenkamp报道以来,已获得极大的发展.近几年来,其应用范围迅速扩大,各种生物大分子如蛋白质,核酸(DNA),多糖等都已能用MALDIMS法进行分子量测定.1993年,... 相似文献
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