在索氏抽提过程中铜与有机物的反应

将黄县褐煤、鄂尔多斯盆地神山褐煤、塔里木盆地泥质灰岩、柴达木盆地灰质泥岩分为A、B2个系列.利用索氏抽提法对以上样品进行对比抽提实验:A系列抽提过程中加铜脱硫,B系列抽提过程中不加铜.实验结果表明:用来脱硫的铜可与抽提物中的某些有机质发生反应,生成有机金属化合物,而大大影响了样品前处理的结果.如果在抽提过程中先不加入铜,待抽提结束后运用柱色谱法将饱和烃和硫作为一个馏分从抽提物中分离出来,然后再进行脱硫,这样就可以很大程度上降低铜对有机质定量测定的影响.

REACTION OF COPPER AND THE ORGANIC MATTER DURING THE SOXHLET EXTRACTION

In order to find whether copper joins the organic compounds reaction, some soxhlet extractor experiments are done. The samples are Huangxian lignite, Shenshan lignite in Ordas basin, argillaceous limestone in Tarim baisn and lime mudstone in Qaidam Basin. They are divided into two series: A and B. In A series, copper is added for eliminating sulfur. And there is not copper with B series during extracting. The results show that copper can react with some organic compounds in extracted matter and form organo-metallic compounds. So it will greatly influence the results of sample pretreatment. After B series experiments, saturated hydrocarbon and sulfur are separated from extracted material as one fraction by co-lumn chromatography. Then we add copper into this fraction to eliminate sulfur. This method can reduce the influence of copper on the quantitative analysis of the organic matter.