白砂糖电导灰分测定结果的不确定度评定  

Uncertainty Evaluation of Determination Results of Conductivity Ash in White Granulated Sugar

作　　者：平秋婷 王桂华 张志强 余构彬 高裕峰 PING Qiu-ting;WANG Gui-hua;ZHANG Zhi-qiang;YU Gou-bin;GAO Yu-feng(Guangdong Provincial Bioengineering Institute (Guangzhou Sugarcane Industry Research Institute)/Guangdong Key Lab of Sugarcane Improvement & Biorefinery,Guangzhou 510316;China Sugar Inspection Center,Guangzhou 510316)

机构地区：[1]广东省生物工程研究所(广州甘蔗糖业研究所)广东省甘蔗改良与生物炼制重点实验室,广东广州510316 [2]国家糖业质量监督检验中心,广东广州510316

出　　处：《甘蔗糖业》2019年第1期51-54,共4页Sugarcane and Canesugar

基　　金：广东省科技计划项目(2016A040403066);广州市科技计划项目(201806010093);广东省科学院项目(2016GDASPT-010)

摘　　要：根据JJF1059.1-2012《测量不确定度评定与表示》,采用新实施的国家标准GB/T35887-2018《白砂糖试验方法》中规定方法进行白砂糖的电导灰分测定。结合实验室日常检测能力和条件,找出影响测定结果的不确定度的因素,通过建立数学模型对各个不确定度分量进行评估和合成,最终合成了相对标准不确定度和扩展不确定度。当白砂糖电导灰分的测定值为0.094 g/kg,扩展不确定为:U=0.46%,结果表示为0.094±0.0046 g/kg,k=2,P=95%。This research was based on JJF 1059.1-2012“Evaluation and Expression of Uncertainty In Measurement”,using the new national standard of GB/T 35887-2018“Analysis Method of White Granulated Sugar”to measure the conductivity ash in white granulated sugar.Combined with laboratory routine testing capabilities and conditions,the influence factors of uncertainty were found,and the mathematical model was established to calculate and compose the component uncertainty.The combined standard uncertainty and the expanded uncertainty of the method were given eventually.When the conductivity ash value was 0.094 g/kg,the expanded uncertainty value was 0.46%,results could be expressed as 0.094±0.0046 g/kg,k=2,P=95%.

关 键 词：白砂糖 电导灰分 电导率仪 不确定度 

分 类 号：TS247[轻工技术与工程—制糖工程]