采用改进的溶剂萃取方法对轮古常渣及其组分中的金属钒卟啉进行分离. 结果表明,从轮古常渣中分离出的卟啉钒的质量分数为18.5%,从轮古常渣正庚烷可溶质和沥青质中分离出的卟啉钒的质量分数分别为68.0%和9.2%. 用紫外-可见光谱对萃取出来的金属钒卟啉和甲磺酸脱金属后得到的游离卟啉进行表征. 结果表明,轮古常渣及其正庚烷可溶质和沥青质中的金属钒卟啉主要是初卟啉. 对轮古常渣中的游离卟啉进行基质辅助激光解吸电离飞行时间质谱分析证明,轮古常渣中的金属钒卟啉主要是初卟啉.
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