塔里木盆地海相碳酸盐岩中有机酸盐的分析

摘要

提出热重/差热(TG/DTA)、红外光谱(IR)和气相色谱/质谱联用结合(GC/MS)分析塔里木盆地海相碳酸盐岩中有机酸盐的方法.用TG/DTA对标样(硬脂酸、硬脂酸镁、硬脂酸钙和碳酸钙)进行分析,确定有机酸气化而有机酸盐不气化的温度区间,由此设计从碳酸盐岩中分离和提取有机酸盐的实验步骤.研究结果表明:验证碳酸盐岩中确实存在有机酸盐；塔里木盆地海相碳酸盐岩中有机酸盐的含量与样品中的碳酸盐含量无相关性,而与样品的沉积相类型具有一定的相关性,即斜坡相沉积环境的沉积岩中相对富集有机酸盐.%A method was developed for the determination of the organic acid salts of marine carbonate rocks in Tarim Basin by the thermogravimetric/differential thermal (TG/DTA), infrared spectroscopy (IR) and gas chromatography/mass spectrometry (GC/MS).By analyzing the guide sample such as the stearic acid, the magnesium stearate, the calcium stearate and the calcium carbonate by TG/DTA, the temperature range where the organic acid was gasificated while the organic acid salt wasn't gasificated were defined, and thereby the experimental procedures for separating and extracting the organic acid salt from the carbonatite rock was designed.The results show that the organic acid salt exists in carbonatite rock by using the infrared spectroscopy and gas chromatography/mass spectrometry. The quantity of the organic acid salts of marine carbonate rocks in Tarim Basin is insignificantly correlated with the carbonate content of samples, but it is correlated with the types of sedimentary facies of samples, namely relative enrichment of the organic acid salts in sedimentary strata of the slope facies sedimentary environment.