| 硫酸钡浊度法测定硫代壳聚糖树脂的含硫量 |
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| 引用本文： | 白林山,雷宏,方金印,张万兴,黄俊.硫酸钡浊度法测定硫代壳聚糖树脂的含硫量[J].安徽工业大学学报,2008,25(1):39-42,75. |
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| 作者姓名： | 白林山 雷宏 方金印 张万兴 黄俊 |
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| 作者单位： | 安徽工业大学化学与化工学院,安徽马鞍山243002 |
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| 基金项目： | 安徽省教育厅自然科学基金
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安徽工业大学SRTP资助项目 |
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| 摘 要： | 研究硫酸钡浊度法测定硫代壳聚糖树脂含硫量的方法。用w（H2O2）=30%溶液和2.5 mol/L NaOH溶液预处理样品,再用王水消解,样品中硫几乎完全转化为硫酸根。以5%乳化剂OP为稳定剂,0.48 mol/L BaCl2溶液为沉淀剂,在420 nm波长处用浊度法测定含硫量。SO42-浓度在8～190μg/mL范围内与吸光度呈线性关系,检测限为0.6μg/mL,用于硫代壳聚糖树脂含硫量的测定,结果满意。
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| 关 键 词： | 硫酸钡 浊度法 测定 硫含量 硫代壳聚糖 |
| 文章编号： | 1671-7872（2008）01-0039-04 |
| 收稿时间： | 2007-04-11 |
| 修稿时间： | 2007年4月11日 |
Nephelometric Determination of Sulfur in Thiolated Chitosan Resins |
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| BAI Lin-shan,LEI Hong,FANG Jin-yin,ZHANG Wan-xing,HUANG Jun.Nephelometric Determination of Sulfur in Thiolated Chitosan Resins[J].Journal of Anhui University of Technology,2008,25(1):39-42,75. |
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| Authors: | BAI Lin-shan LEI Hong FANG Jin-yin ZHANG Wan-xing HUANG Jun |
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| Affiliation: | (School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma＇anshan 243002, China) |
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| Abstract: | The determination of sulfur in thiolated chitosan resins with barium sulfate nephelometery was developed. The sample was pretreated with 30% H2O2 and 2.5 mol/L NaOH, and then digested with aqua regia to make full oxidation of sulfur in thiolated chitosan resins to sulfate. In the presence of 5% emulsifier OP, sulfate was precipitated with 0.48 mol/L BaCl2; the absorbance was measured at the wavelength of 420 nm. The linear range and detection limit for sulfate was 8-190 μg/mL and 0.6 μg/mL, respectively. The method was applied to the determination of sulfur in thiolated chitosan resins with satisfactory results. |
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| Keywords: | barium sulfate nephelometry determination sulfur content thiolated chitosan |
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