| 浊度法测定葡聚糖溶液浓度的改进 |
| Improvement of the Turbidimetric Method for Determination of Dextran Solution Concentration |
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| 中文摘要: |
| 浊度法作为快速定量检测葡聚糖的一种简便方法已经应用于膜性能评价检测领域。对葡聚糖溶液和乙醇的反应机理进行分析，提出了反应进程是影响最终溶液体系浊度值稳定性的重要因素的推论。通过改进实验条件，提高了葡聚糖溶液浓度测定值的准确度，解决了检测时无法建立工作曲线和重复性差的问题。针对20，100，200 K的葡聚糖得到线性范围100～1000mg/L，检出限0.007～0.093mg/L，加标回收率80%～95%，精密度2.5%的满意结果。 |
| 英文摘要: |
| The turbidimetric method is a kind of simple and convenient way of rapid quantitative detection of dextran, which has been applied to membrane performance evaluation and testing. This work was based on the reaction mechanism of dextran solution and ethanol, and proposed that the reaction process is an important factor that affects the stability of the turbidity value of the final solution system. By improving the experiment condition, the accuracy of the dextran solution concentration was raised, and the problem that working curve and repeatability cannot be set up in testing was solved. Satisfactory results were achieved for linear range (100～1000) mg/L, detection limit (0.007～0.093) mg/L, and standard recovery (80%～95%) of dextran (20 K/ 100 K/ 200 K). |
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| 中文关键词: 葡聚糖 浊度 混合速率 |
| 英文关键词:dextran turbidity mixing rate |
| 基金项目: |
| DOI：10.11823/j.issn.1674-5795.2017.05.03 |
| 引用本文：于铭茹,张川.浊度法测定葡聚糖溶液浓度的改进[J].计测技术,2017,37(5):12~15. |
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