摘要
为有效控制实验室的测量过程,提高检测结果的可靠性和准确性,根据日常检测情况,对皮革中甲醛含量检测项目的不确定度评定进行分析和评定,建立皮革中甲醛含量的不确定度评价方法.采用分光光度法,测定皮革中甲醛含量,通过建立测量数学模型,结合不确定度评定规则,分别对甲醛含量测定过程中引入的相对不确定度分量进行计算评估,最终实现对检测结果的不确定度评价.试验得出,皮革中甲醛含量为 16.96 mg/kg,扩展不确定度为 0.69 mg/kg.在试验条件下,认为标准溶液本身和分光光度仪测量吸光度产生的不确定度是影响结果的主要因素.
Abstract
To enhance the control of the laboratory's measurement processes and elevate the reliability and precision of test results,an analysis and assessment of the uncertainty of formaldehyde content testing in leather are conducted based on daily testing scenarios.A method for evaluating the uncertainty of formaldehyde content in leather is established.Utilizing spectrophotometry,the formaldehyde content in leather is measured.By establishing a mathematical model for measurement and applying uncertainty assessment guidelines,the relative uncertainty components introduced during formaldehyde content determination are calculated and evaluated,ultimately leading to an assessment of the uncertainty of the test results.The experiment concludes that the formaldehyde content in leather is 16.96 mg/kg,with an expanded uncertainty of 0.69 mg/kg.Under the experimental conditions,it is determined that the uncertainty arising from the standard solution itself and the absorbance measurement by the spectrophotometer are the primary factors influencing the results.
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