分光光度法测定高纯度膨润土吸蓝量
黄丽12,高倩倩3,蔡延平2,董清木2,刘海波3
厦门大学化学化工学院,福建厦门 361005;厦门出入境检验检疫局,福建厦门 361005;厦门紫金矿冶技术有限公司,福建厦门 361101
Determination of the Methylene Blue Value of High Levels of Bentonite by Spectrophotometry
黄丽12,高倩倩3,蔡延平2,董清木2,刘海波3
1. College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China; 2. Xiamen Entry–Exit Inspection and Quarantine Bureau, Xiamen 361005, China; 3. Xiamen Zijin Mining and Metallurgy Technology Co. Ltd., Xiamen 361101, China
摘要:以分光光度法测定高含量膨润土吸蓝量,应用正交试验设计对分光光度法的实验条件进行优化,确定的最佳实验条件:煮沸时间为 5 min,4% 焦磷酸钠溶液加入体积为 20 mL,0.01 mol/L 亚甲基蓝溶液加入体积为 30 mL,振荡时间为 15 min。该法与滴定法对比,测定值相对误差在 4% 以内,相对标准偏差为 1.04%,可满足高纯度膨润土吸蓝量的分析要求。
Abstract:Spectrophotometry was used to measure the methylene blue value of high purity bentonite, and the orthogonal tests were used to optimize and determine the optimal experimental conditions: the boiling time was 5 min, 4% sodium pyrophosphate solution was added to a volume of 20 mL, 0.01 mol/L methylene blue solution was added to the volume of 30 mL, shaking time was 15 min. Compared the spectrophotometry to traditional titration analysis, the relative error of the experimental results was less than 4% and the relative standard deviation was 1.04%, which was proved to be accurate and reliable to meet the analytical requirements.
关键词:高纯度膨润土;吸蓝量;正交试验;分光光度法
Keywords:high purity bentonite; methylene blue value; orthogonal tests; spectrophotometry
基金:国家质检总局科技计划项目(2014IK254)
本文引用格式:
黄丽,高倩倩,蔡延平,等.分光光度法测定高纯度膨润土吸蓝量[J].化学分析计量,2014,23(2):17-19.
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