Measure method of spandex in core spun yarn by new solvent such as aceti cacid ,formic acid and cyclohexanone were studied.The result show that the new method has little error and short measure time.

• 选用冰乙酸、甲酸、环己酮等为溶剂对含有氨纶的样品进行溶解,再经过滤、洗涤、干燥、恒重,测定其中氨纶的含量,与手工捻拆方法比较,方便省时,实验误差小,为工厂准确快速测量混合包芯纱中的氨纶含量进行了有益的探索。