纺织品中致敏性分散染料测定的不确定度评定

Evaluation of uncertainty in determination of allergenous disperse dyes in textiles

按照GB/T 20383-2006用HPLC-DAD测定纺织产品中可萃取致敏性分散染料。以分散棕1为例,分析了测试过程中不确定度的来源,对各不确定度分量进行评定及合成,并计算得出合成不确定度和扩展不确定度。结果表明,对本测试方法影响较大的不确定度分量是标准物质配制、测试过程中的随机因素。在重复测定的条件下,测定结果的不确定度仅与溶液中的致敏性分散染料质量浓度有关。

According to the standard of GB/T 20383-2006, the extractable allergenous disperse dyes in textiles were detected by HPLC-DAD. Taking Disperse Brown 1 as an example, source of uncertainties were analyzed during the determination, and the uncertainty components were evaluated and composed, and the composed and expanded uncertainties were obtained through calculation. The results showed that the main factors affecting the determination were preparation of reference materials and random factors during determination. Under repeated measurement conditions, the uncertainty of determination was only related to the concentration of allergenous disperse dyes.