Luo Man, Guan Ping, Liu Wen-hui
The Key Laboratory of Orogenic Belts and Crustal Evolution of Ministry of Education, Peking University, Beijing 100871, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2007 Feb;27(2):250-3.
It is considered that saturated fatty acids and their salts may be potential hydrocarbon-generation matters in carbonate rocks. However, there is no effective method to distinguish them from natural sediments, making recognizing their distribution in sediments a challenge. Formic acid, acetic acid, stearic acid, calcium formate, calcium acetate, magnesium acetate, calcium stearate, and magnesium stearate from some chemical plants were investigated by means of Fourier transform infrared spectroscopy. Their infrared spectra were obtained and the distinctions of the infrared spectra between saturated fatty acids and their salts were studied in detail. The differences in the group's electron-releasing ability, molecular reduced mass, ion configuration and the length of carbon chain can cause wavelength shifts of infrared absorption peaks of the saturated fatty acids and their salts. The research provides a method for the identification of saturated fatty acids and their salts in samples from nature.
一般认为饱和脂肪酸及其盐类可能是碳酸盐岩中潜在的生烃物质。然而，目前尚无有效的方法将它们与天然沉积物区分开来，因此识别它们在沉积物中的分布具有挑战性。利用傅里叶变换红外光谱法对一些化工厂的甲酸、乙酸、硬脂酸、甲酸钙、乙酸钙、乙酸镁、硬脂酸钙和硬脂酸镁进行了研究。获得了它们的红外光谱，并详细研究了饱和脂肪酸及其盐类红外光谱的差异。基团的电子释放能力、分子折合质量、离子构型和碳链长度的差异会导致饱和脂肪酸及其盐类红外吸收峰的波长发生偏移。该研究为鉴定天然样品中的饱和脂肪酸及其盐类提供了一种方法。
