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对正脂防酸系列化合物在1350～1180cm~(-1)间红外光谱特征的研究,已有一些报导。Jones 和 Meiklejohn 等对正脂肪酸系列及其盐类的红外光谱进行研究后指出,在1350～1180cm~(-1)间的吸收峰可用来鉴定链长。Ballamy 还认为,以固态或结晶态测试的长链脂肪酸在1350～1180cm~(-1)间的系列峰为等间距。有关谱峰数与亚甲基长链碳原子数目之间关系的经验公式,也定义在1350～1180cm~(-1)之间。用现代大型付里叶变换红外光谱仪重新测定正脂肪酸系列化合物的结果,表明1350～1180cm~(-1)间相邻谱带间距并非完全相等。在1350～1325cm~(-1)间的谱带间距较大,1325～1300cm~(-1)和1200～1180~-cm~(-1)间的间距较小,1300～1200cm~(-1)间的间距近似相等。仔细考查系列谱峰数和亚甲基数之间的关系,计算谱峰
Some studies have been reported on the infrared spectral characteristics of the series of n-propoxylated anti-acid compounds at 1350 ~ 1180cm -1. Jones and Meiklejohn et al. Studied the infrared spectra of n-fatty acid series and their salts, and pointed out that the absorption peak between 1350 and 1180 cm -1 can be used to identify the chain length. Ballamy also believes that the series of peaks between 1350 and 1180 cm -1 of long chain fatty acids tested in solid or crystalline form are equally spaced. The empirical formula for the relationship between the number of peaks and the number of long-chain carbon atoms in the methylene group is also defined as between 1350 and 1180 cm -1. The results of the re-determination of n-fatty acid series compounds by modern large-scale Fourier transform infrared spectroscopy showed that the distances between adjacent bands in 1350 ~ 1180cm -1 were not exactly equal. The bands between 1350 and 1325 cm -1 were relatively large, and the intervals between 1325 and 1300 cm -1 and 1200 and 1180 cm-1 were smaller than those between 1300 and 1200 cm -1 ) The spacing between approximately equal. Carefully examine the relationship between the series of peaks and the number of methylene, calculate the peak