电位滴定法测定海上油田水中总碱度的不确定度评定  

Uncertainty evaluation in the determination of total alkalinity in offshore oilfield water using potentiometric titration method

作　　者：赵杏 肖洒[1] 彭雪飞[1] 任培培 解琼玉 ZHAO Xing;XIAO Sa;PENG Xuefei;REN Peipei;XIE Qiongyu(China Oilfield Services Limited,Tianjin Key Laboratory of Offshore Oil Exploration Enterprises,State Key Laboratory of Offshore Oil and Gas Exploitation,Tianjin 300459,China;Tianjin Branch of Guangdong Oil Service CO.Limited,Tianjin 300459,China)

机构地区：[1]中海油田服务股份有限公司,天津市海洋石油难动用储量开采企业重点实验室,海洋油气高效开发全国重点实验室,天津300459 [2]广东南油服务有限公司天津分公司,天津300459

出　　处：《化学分析计量》2024年第12期120-125,共6页Chemical Analysis And Meterage

基　　金：海上中深层特稠油热采关键技术研究及应用(20YDLZCG00190);聚合物驱油田解聚剂开发(YSB24YF004)。

摘　　要：建立了电位滴定法测定海上油田水中总碱度的不确定度评定。以电位滴定法测定海上油田水中总碱度,分别对水样测量重复性、电位滴定仪pH示值误差、标定盐酸标准溶液浓度、滴定水样总碱度等实验过程中所引入的实验参数分量建立数学模型和不确定度分析。通过分析和计算,海上油田水中总碱度为(118.66±0.84)mg/L,并认为在海上油田水的总碱度测量过程中,标定盐酸标准溶液的浓度引入的不确定度是最为显著的影响因素,其次为水样测量重复性操作引入的人为随机不确定度。An uncertainty assessment was established for the determination of total alkalinity in offshore oilfield water using potentiometric titration method.The total alkalinity of offshore oilfield water was determined by potentiometric titration method,and mathematical models and uncertainty analysis were established for the experimental parameter components introduced in the experimental process,such as the repeatability of water sample measurement,pH indication error of potentiometric titrator,calibration of hydrochloric acid standard solution concentration,and total alkalinity of titrated water sample.Through analysis and calculation,the total alkalinity of offshore oilfield water was(118.66±0.84)mg/L.It was believed that the uncertainty introduced by calibrating the concentration of hydrochloric acid standard solution was the most significant influencing factor in the measurement process of total alkalinity of offshore oilfield water,followed by the artificial random uncertainty introduced by the repetitive operation of water sample measurement.

关 键 词：电位滴定法 总碱度 不确定度 

分 类 号：O655.2[理学—分析化学]