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首页> 外文期刊>Analytical Sciences >Polyvinyl Alcohol as a Useful Indicator on Iodometry (II): Temperature Dependence of Iodine Recovery and the Correction Method of Iodine Concentration in the Lower Detection Limit Region
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Polyvinyl Alcohol as a Useful Indicator on Iodometry (II): Temperature Dependence of Iodine Recovery and the Correction Method of Iodine Concentration in the Lower Detection Limit Region

机译：聚乙烯醇作为碘量法的有用指标（II）：碘回收率的温度依赖性和检测下限区域中碘浓度的校正方法

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摘要

In an iodometric titration method for iodine (or chlorine) analysis, the percent recovery of iodine (or chlorine) decreases in the low concentration region and at the relatively higher temperature range. We have shown that the percent recovery vs. concentration curve can be expressed by a simple empirical formula. The empirical formula contains parameters that depend on temperature and those parameters were obtained as a function of temperature. The empirical formula can be used as a correction function for experimental iodine (or chlorine) concentrations. By applying the correction function with the parameters to the experimentally obtained concentrations, we can estimate the reliable concentration in the low concentration region. Estimated concentrations were within 10% (as RSD) of the exact values after the correction in the range of 0.4 mg I2 L-1 (≡ ca. 0.1 mg as Cl2 L-1) - 4.4 mg I2 L-1 (≡ ca. 1.2 mg as Cl2 L-1) in the temperature range of 0 to 30°C.
机译：在用于碘（或氯）分析的碘量滴定法中，碘（或氯）的回收百分比在低浓度区域和相对较高的温度范围内降低。我们已经表明，回收率与浓度的关系曲线可以用一个简单的经验公式表示。经验公式包含取决于温度的参数，并且这些参数是作为温度的函数获得的。经验公式可用作实验碘（或氯）浓度的校正函数。通过将校正函数和参数应用于实验获得的浓度，我们可以估计低浓度区域的可靠浓度。校正后的估计浓度在精确值的10％以内（以RSD计），范围为0.4 mg I2 L-1（≡约0.1 mg，Cl2 L-1）-4.4 mg I2 L-1（≡ca.在0至30°C的温度范围内为1.2 mg Cl2 L-1）。

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