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1·物理性质术语 physical terms 1.1 旋光度 rotation 平面偏振光通过含有不对称碳原子或某些光学活性的化合物液体或溶液时,在规定条件下使偏振光平面向左或向右旋转的度数。 1.1.1 比旋光度 specific rotation 偏振光透过厚1分米,每毫升中含有1克旋光物质的溶液,在规定温度下测得的旋光度。通常以〔a〕_D~t(S)表示,其中t为测定时温度(℃),D为钠光灯的光源,包含钠谱线589.0纳米和589.6纳米。S为所用的溶剂。 1.2 折光率 refractive index
1. Physical terms 1.1 Terms of rotation rotations of plane polarized light through a liquid or a solution containing an asymmetric carbon atom or some optically active compound, rotating the plane of polarized light to the left or right under specified conditions. 1.1.1 Specific rotation Polarized light through the thickness of 1 decimeter, per milliliter containing 1 g of optically active substance solution, measured at the specified optical rotation. Usually expressed as [a] _D ~ t (S), where t is the temperature at the time of measurement (° C) and D is the light source of a sodium lamp containing sodium lines 589.0 nm and 589.6 nm. S is the solvent used. 1.2 refractive index