磷钼蓝比色法测定洗衣凝珠中总五氧化二磷含量不确定度评定  

Uncertainty Evaluation of Determination of Total Phosphorus Pentoxide Content in Laundry Condensation Beads by Phosphomolybdenum Blue Colorimetric Method

作　　者：刘睿 段平梅 公培龙 姚晨之 LIU Rui;DUAN Pingmei;GONG Peilong;YAO Chenzhi(Sinolight Daily Chemical Inspection&Certification Co.,Ltd.,Taiyuan 030001,Shanxi,China;National Cleaning Products Quality Supervision and Inspection Center,Taiyuan 030001,Shanxi,China;China Research Institute of Daily Chemistry Co.,Ltd,Taiyuan 030001,Shanxi,China)

机构地区：[1]中轻日用化学检验认证有限公司,山西太原030001 [2]国家洗涤用品质量检验检测中心(太原),山西太原030001 [3]中国日用化学研究院有限公司,山西太原030001

出　　处：《中国洗涤用品工业》2023年第4期22-28,共7页China Cleaning Industry

摘　　要：对磷钼蓝比色法测定洗衣凝珠中总五氧化二磷含量的不确定度进行评定。通过分析建立数学模型,对测定过程的主要不确定进行评定,主要包括样品称量、试样移取体积、标准曲线配制、标准曲线拟合、仪器校准以及重复性测定6个方面。最后计算合成标准不确定度及扩展不确定度。结果表明:样品测量结果为(0.055+0.002)%(k=2),对不确定度影响较大的是标准曲线配制,其次是标准曲线拟合。因此实验过程中应准确配制标准溶液和选取合适的标准曲线浓度范围,以提高检测结果的准确性。The uncertainty of determination of total phosphorus pentoxide in laundry condensation beads by phosphomolybdenum blue colorimetric method was evaluated.Through the analysis and establishment of mathematical model,the main uncertainties during the determination process were evaluated,including sample weighing,sample solution volume removed,standard curve preparation,standard curve fitting,instrument calibration and repeatability of measurement,finally the synthetic standard uncertainty and extended uncertainty were calculated.The results showed that the sample measurement results was(0.055+0.00164)%(k=2),the standard curve preparation has a great influence on the uncertainty,followed by the standard curve fitting.Therefore,in the experiment,the standard solution should be accurately prepared,the appropriate concentration range of standard curve should be selected,and improve the accuracy of test results.

关 键 词：不确定度 总五氧化二磷 磷钼兰比色法 洗衣凝珠 

分 类 号：TB99[一般工业技术—计量学] X798[机械工程—测试计量技术及仪器]