The content of starch in starch based plastic shopping bag was measured by thermogravimetric method,and the uncertainty components affecting the measurement were analyzed and evaluated.The results showed that when the starch content was 15.37%,the extended uncertainty was 0.22%(k=2).At the same time,due to the relative contribution of repeatability components,inspection and testing institutions should pay attention to instru-ment maintenance and personnel training.
关键词
热重法/淀粉基塑料购物袋/淀粉含量/不确定度
Key words
thermogravimetric method/starch based plastic shopping bags/starch content/uncertainty