(EN) The invention provides a method for determining the content of chloroalkane in chloral hydrate or a preparation thereof by gas chromatography, which comprises the following steps of 1, precisely weighing a chloroalkane reference substance, and dissolving the chloroalkane reference substance in an organic solvent to obtain a reference substance solution, 2, dissolving or diluting a to-be-detected sample chloral hydrate or a preparation thereof with water or an inorganic salt aqueous solution optionally, adding an organic solvent for extraction, and taking an organic layer as a test solution, and 3, respectively detecting the reference substance solution and the test solution through gas chromatography, and calculating the content of the chloralkane.
(ZH) 本发明提供通过气相色谱法测定水合氯醛或其制剂中氯代烷烃的含量的方法，其包括以下步骤：第一步：精密称取氯代烷烃对照品，将其在有机溶剂中溶解，得到对照品溶液；第二步：将待测样品水合氯醛或其制剂任选地用水或无机盐水溶液溶解或稀释，加入有机溶剂进行萃取，取有机层作为测试溶液；以及第三步：通过气相色谱法分别检测对照品溶液和测试溶液，并计算氯代烷烃的含量。
