冯瑞华,彭平安,宋建中,张文兵

• 1:中国科学院广州地球化学研究所有机地球化学国家重点实验室
• 2:中国科学院广州地球化学研究所有机地球化学国家重点实验室
• 3:中国科学院广州地球化学研究所有机地球化学国家重点实验室
• 4:中国科学院广州地球化学研究所有机地球化学国家重点实验室 广东广州510640中国科学院研究生院

摘要(Abstract)：

采用电喷雾质谱(ESI-MS)技术,对水溶态Pahokee泥炭腐殖酸的ESI MS特征进行了研究。ESI MS质谱扫描图中,离子峰连续分布,m/z值主要集中在低于1 500 的范围内,在质谱图低质荷比端形成相差2 amu的奇数系列峰,可能为复杂分子峰[M-1]的系列中性丢失的结果;在m/z约250,350,500 和700 处有类似“波”的离子峰分布,可能暗示不同来源的木质素单体形成的二聚体、三聚体、四聚体结构等。对木质素17 种模型化合物的电喷雾二级质谱碎片机理进行了较为详细的研究,以此来推断腐殖酸m/z200以内离子峰的结构。m/z 70 110为Pa hokee泥炭腐殖酸的“核结构”,m/z 110 200主要为三种木质素来源的单体结构及其衍生物,总体上可看出Pahokee泥炭腐殖酸的母源为裸子植物和被子植物。该方法对腐殖酸样品具有重现性,可用于腐殖酸的结构研究。

关键词(KeyWords)： 腐殖酸;电喷雾质谱(ESI-MS);结构特征

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(40332019)

作者(Author): 冯瑞华,彭平安,宋建中,张文兵

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