试验条件对次氯酸钠法毛/粘混合试样纤维定量分析的影响

Influence of test conditions on the fiber quantitative analysis of wool/viscose mixed samples by sodium hypochlorite method

针对采用GB/T 2910.4—2009《纺织品定量化学分析第4部分:某些蛋白质纤维与某些其他纤维的混合物(次氯酸盐法)》中次氯酸钠溶解法对毛/粘混合试样纤维定量分析时,次氯酸钠溶液对粘胶纤维存在一定程度的损伤,这部分损伤计入到羊毛含量中会使得羊毛含量测试结果较实际含量偏高的问题,通过试验研究次氯酸钠溶液浓度、试验温度以及放置时间对毛/粘混合试样纤维定量结果的影响规律。结果表明:批量试验中放置时间越长对粘胶纤维的损伤越大;次氯酸钠浓度为1.0 mol/L时对粘胶纤维的损伤明显;试验温度在20~30℃范围,对试验结果影响相对较小。

For the quantitative analysis of wool viscose blended products by sodium hypochlorite dissolution method GB/T 2910.4—2009,the wool contents are higher than that of the actual content.It shows that the sodium hypochlorite solution has some damage to the viscose fiber,result in the increase of wool content,affecting the accuracy of the test results.In this paper,the effects of sodium hypochlorite solution concentration,test temperature and storage time on the quantitative results of wool viscose blended products were studied.The results show that the longer the storage time is,the greater the damage is.The influence of sodium hypochlorite concentration on viscose fiber damage is obvious when concentration is 1.0 mol/L,and in the range of 20-30℃,the influence of test temperature is relatively small.