流动注射光度法测定地热水中可溶性硅  

FI-Photometric Determination of Dissolved Silica in Geothermal Water

作　　者：钟红生[1] 张红[1] 李永生[1] 

机构地区：[1]四川大学化学工程学院,成都610065

出　　处：《理化检验（化学分册）》2011年第9期1037-1039,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：提出了基于正硅酸与钼酸铵的显色反应和流动注射分析装置的流动注射光度法测定地热水中可溶性硅量的方法。对仪器的各项工作参数，包括显色反应所需钼酸铵溶液的浓度及要求的酸度条件，各反应圈的长度，试剂环的定量体积，流动注射系统出口的流量等做了试验并予以优化，所提出的装置可达到每小时60个样品的进样频率。测定二氧化硅的线性范围为20-800mg·L-1。应用此法对实样的测定结果与国家标准方法（GB／T12148～2006）测得的结果相符。A flow injection analytical installation was fabricated for the photometric determination of silicate based on its reaction with ammonium molybdate and applied to the determination of dissolved silica in geothermal water. Various working parameters of the instrument including concentration of ammonium molybdate solution and acidity for the color reaction, lengths of reaction coils, definite volume of reagent ring, flow-rate at the out-let of the system and etc. were tested and optimized. Sampling frequency of 60 samples per hour was attained by this method. Range of linearity for SiO2 was found between 20--800 mg · L-1. In the analysis of substantial samples by the present method, results of SiO2 contents found were in consistency with the results found by the standard method of GB/T 12148--2006.

关 键 词：流动注射分析 光度法 可溶性硅 地热水 

分 类 号：O657.3[理学—分析化学]