工程勘察中比浊法测定硫酸盐的实验研究  

作　　者：刘明丽 陈莹 王丹 战博 辛敬文 

机构地区：[1]华北有色工程勘察院有限公司,石家庄050021 [2]自然资源部金属矿山地下水灾害防治工程技术创新中心,石家庄050021

出　　处：《科技创新与应用》2025年第1期52-55,共4页Technology Innovation and Application

摘　　要：DZ/T 0064.65—2021《地下水质分析方法》硫酸盐的测定比浊法方法中,吸光度对实验条件较敏感,标准曲线线性较差,数据准确度不能满足要求。通过改变氯化钡形态(晶体变为溶液)、延长搅拌后静置时间、增加混合稳定剂的加入量等实验条件,分析吸光度及标准曲线相关系数的变化,找出满足检测数据准确度的实验条件,让该方法更好地在实际中应用。实验结果表明,改变上述实验条件,对吸光度有较大影响;改变氯化钡形态、增加混合稳定剂的加入量且延长搅拌后的静置时间,都可以提高标准曲线的线性相关性,相关系数R2可以达到0.999,从而提高检测数据准确度,为工程勘察提供更准确的数据支持、为工程质量及安全提供更有力保障。In the DZ/T 0064.65—2021"Analysis Method for Groundwater Quality",the turbidimetric method for the determination of sulfates is sensitive to experimental conditions,the linearity of the standard curve is poor,and the data accuracy cannot meet the requirements.By changing the morphology of barium chloride(crystals turn into solution),lengthening the standing time after stirring,and increasing the amount of mixed stabilizer,the changes in absorbance and standard curve correlation coefficients were analyzed to find out the experimental conditions that meet the accuracy of the test data.,allowing this method to be better applied in practice.The experimental results show that changing the above experimental conditions has a great impact on absorbance;changing the form of barium chloride,increasing the added amount of mixed stabilizer and lengthening the standing time after stirring can all improve the linear correlation of the standard curve,and the correlation coefficient R2 can reach 0.999,thereby improving the accuracy of detection data,providing more accurate data support for engineering investigation,and providing a stronger guarantee for project quality and safety.

关 键 词：比浊法 硫酸盐 氯化钡溶液 静置时间 混合稳定剂 

分 类 号：TU461[建筑科学—结构工程]