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若我们合成的某有机化合物是液体的话,较捷便的一种鉴定方法卽利用折射仪来测定它的折射率n。例如马斯特柳科娃等测得纯的(C_2H_5O)_2(?)—SH n_D~(20)=1.5070,d_4~(20)=1.1654,而我们在相同反应条件下得到的产品,其沸点相近且n_D~(20)==1.5088,那么基本上可以确定此产品是二硫代磷酸二乙酯(一般说来,与标准样品的折射率误差允许在0.0002左右)。在实验室内常利用样品的折射率n与密度d、间的
One of the more convenient methods for identifying an organic compound that we synthesize is by using a refractometer to determine its refractive index n. For example, Mastersuvkova et al. Measured pure (C 2 H 5 O 2) - SH n D 20 = 1.5070 and d 4 -20 = 1.1654, and the products we obtained under the same reaction conditions had a boiling point (20) == 1.5088, it is basically determined that this product is diethyl dithiophosphate (in general, the refractive index error with the standard sample is allowed to be about 0.0002). In the laboratory often use the sample refractive index n and density d, between