| 硫酸钡比浊法分散体系的稳定性研究 |
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| 引用本文： | 席改卿,庞秀言.硫酸钡比浊法分散体系的稳定性研究[J].河北师范大学学报(自然科学版),2007,31(4):503-505,513. |
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| 作者姓名： | 席改卿 庞秀言 |
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| 作者单位： | 邯郸学院,化学系,河北,邯郸,056005;河北大学,化学与环境科学学院,河北,保定,071002 |
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| 基金项目： | 河北省教育厅博士科研项目 |
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| 摘 要： | 为了提高硫酸钡比浊法测定硫含量方法的重复性和准确性,讨论了测定波长、聚乙烯醇及乙醇用量、酸度对硫酸钡分散体系稳定性的影响.实验确定分散体系中50 mg/g的聚乙烯醇和无水乙醇最佳用量分别为2.0 mL和3.0 mL,pH控制在1.0.方法的RSD为0.48 %(n=6).将硫酸钡比浊法用于膨胀石墨中硫含量的测定,得到了令人满意的结果.
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| 关 键 词： | 比浊法 稳定性 聚乙烯醇 乙醇 pH |
| 文章编号： | 1000-5854（2007）04-0503-03 |
| 修稿时间： | 2006-12-182007-02-05 |
Study on the Stability of BaSO4 Dispersing System in the Turbidimetric Detection |
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| XI Gai-qing,PANG Xiu-yan.Study on the Stability of BaSO4 Dispersing System in the Turbidimetric Detection[J].Journal of Hebei Normal University,2007,31(4):503-505,513. |
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| Authors: | XI Gai-qing PANG Xiu-yan |
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| Institution: | 1.Department of Chemistry,Handan College,Hebei Handan 056005,China; 2.College of Chemistry and Environmental Scienees,Hebei University,Hebei Baoding 071002,China |
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| Abstract: | To improve the repetition and veracity of the BaSO4 turbidimetric method in the detection of sulfur,wavelength of source,dosage of 50 mg/g polyvinyl ethanol solution,ethanol and pH were discussed.Optimum condition was determined as follows:pH of the system was 1.0,2.0 mL of 50 mg/g polyvinyl alcohol solution and 3.0 mL ethanol was used to insure the formation of steady dispersing system.RSD of the method was 0.48 % with n=6.The above method was employed to detect the sulfur content in expanded graphite sample,and the result was satisfying. |
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| Keywords: | turbidimetry stability polyvinyl ethanol ethanol pH |
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