针对甘油三酯(TAG)类化合物的复杂性,建立了分析小鼠血清中TAG类化合物的方法.采用经典的氯仿-甲醇溶剂体系对血中的TAG类化合物进行提取.脂质提取物经Varian ChromSpher 5 Lipids柱分离,在0.75mL/min的流速下以乙腈-正已烷(1∶99,v/v)为流动相进行等度洗脱,采用大气压化学电离源正离子模式电离,质谱增强型全扫描、增强型子离子扫描和中性丢失扫描模式检测.根据银离子色谱对双键的保留规律以及质谱所给出的碎片离子信息,对血清中TAG类化合物进行了结构鉴定.结果表明采用该方法可以从小鼠血清中鉴定到66个IAG类化合物以及5个胆固醇酯.该方法简单,重现性好,可通用于其他样品中TAG类化合物的检测.
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