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提出了一种新颖的基于光纤折射率传感原理的溶液密度测定方法,适用于已知溶液中溶质成分时密度的测量。分别测定了NaCl和KNO3溶液在恒定温度(20℃)下不同浓度时的折射率,与溶液的密度进行对比研究发现,溶液折射率与密度成线性关系,只要测得溶液的折射率就能测定溶液的密度。应用本方法对NaCl和KNO3溶液分别进行密度测量,实验结果与理论十分吻合,测量精度可达到10-5g/ml量级。在不同温度下,用本方法对NaCl和KNO3溶液进行密度测量,实验结果与文献值一致,证实了本方法对测试环境的适用性强。对本方法进行了稳定性测试,效果良好。
A novel solution density measurement method based on the principle of optical fiber refractive index sensing is proposed, which is suitable for measuring the density of solute components in known solutions. The refractive indices of NaCl and KNO3 solutions at different concentrations at constant temperature (20 ℃) were measured respectively. The comparison with the solution density shows that the refractive index of the solution is linear with the density, and the refractive index of the solution can be measured The density of the solution. The density of NaCl and KNO3 solutions were measured by this method. The experimental results are in good agreement with the theoretical ones. The measurement accuracy can reach 10-5 g / ml. At different temperatures, the density of NaCl and KNO3 solutions was measured by this method. The experimental results are in accordance with the literature values, which confirms the applicability of this method to the test environment. The method of stability test, the effect is good.