关于JJG 820-1993《手持糖量(含量)计及手持折射仪》的探讨  

Discussion on JJG 820-1993 Hand Saccharimeter(Content-Meter)and Hand Refractometer

作　　者：顾玲玲[1] Gu Lingling(Shanghai Institute of Measurement and Testing Technology,Shanghai 200233,China)

机构地区：[1]上海市计量测试技术研究院,上海200233

出　　处：《化学分析计量》2021年第6期67-71,共5页Chemical Analysis And Meterage

摘　　要：对JJG 820—1993《手持糖量(含量)计及手持折射仪》中存在的问题进行探讨。对JJG 820—1993中手持含量计的校准方法中的“量程”、“准确度”表述提出了修改意见。分析了现有的蔗糖类标准物质及折射率标准物质不能解决手持糖量计及手持折射仪溯源问题的原因。用分析纯蔗糖配制校准用蔗糖标准工作溶液,以V棱镜折射仪及测量用表线性插值法对溶液定值。采用标准溶液对手持糖量(含量)计进行了校准,对示值误差校准结果进行不确定度评定且对被测量仪器的示值误差作了符合性评定。该方法解决了手持糖量计及手持折射仪的溯源问题,可作为高精度台式数字折光仪校准方法的参考。A discussion was made on the problems existing in JJG 820-1993 Hand Saccharimeter(Content-Meter)and Hand Refractometer.An amendment to the calibration method,measuring range and accuracy of hand-held content meter in JJG 820-1993 was proposed.The reasons why the existing sucrose and refractive index reference materials can’t be used to solve the traceability problems of hand saccharimeter and hand refractometer are analyzed.A standard working solution of sucrose for calibration was prepared by analyzing pure sucrose,and the solution was determined by V prism refractometer and linear interpolation method.The standard solution was used to calibrate the sugar content(content)meter,the uncertainty of the calibration result of the indication error was evaluated,and the conformity of the indication error of the measured instrument was evaluated.This method solves the problem of traceability of handheld sugar meter and handheld refractometer,and can also be used as a reference for calibration method of high precision desktop digital refractometer.

关 键 词：手持糖量计 标准物质 V棱镜折射仪 不确定度 示值误差 

分 类 号：O657[理学—分析化学]