采用硅钼蓝-紫外可见分光光度法测定里松温泉源头水中硅的质量浓度。实验结果表明：体系中硅钼蓝的λ_max=814 nm，硅质量浓度在0~0.019 63 μg/mL范围内与吸光度具有良好的线性关系，其线性方程为y=0.212 5+1.197 2x，相关系数为0.999 6，回收率为96.47%~105.0%，RSD为0.358%~1.191%。该方法操作简便、精密度好、准确率高，可用于温泉水中硅质量浓度的测定。

The content of silicon in the source water of Lisong hot spring is detected by silicon molybdenum blue UV-visible spectrophotometry method.It is indicated by experimental results that λ_max of silicon molybdenum blue in the system is 814 nm and the mass concentration of silicon within the scope of 0-0.019 63 μg·mL^-1 has good linear relationship with absorbance.The linear equation is y=0.212 5+1.197 2x and the correlation coefficient is 0.999 6.The recovery rate is in the range of 96.47%-105.0% and the RSD is in the range of 0.358%-1.191%.This method is easy to operate and has high precision and accuracy,which can be used for the determination of silicon content in hot spring water.

陈秋娟(1983-),女,硕士研究生,讲师,研究方向为天然产物提取、纯化与分析,2002090099@163.com