| 分光光度法测定硅钙钾肥中水溶性硫酸根离子 |
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| 引用本文： | 周美姣,朱云勤.分光光度法测定硅钙钾肥中水溶性硫酸根离子[J].化工技术与开发,2011,40(12):35-37,53. |
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| 作者姓名： | 周美姣 朱云勤 |
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| 作者单位： | 贵州大学化学与化工学院,贵州贵阳,550025 |
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| 摘 要： | 以不溶性含钾岩石和磷石膏为原料制备的硅钙钾肥中含有水溶性硫酸根离子,其含量是影响硅钙钾肥产品质量的一个重要指标.本文采用铬酸钡分光光度法测定硅钙钾肥中的水溶性的硫酸根含量.于420hm波长处,硫酸根浓度在20～160μg· mL-1范围内与铬酸根吸光度呈线性关系,线性回归方程y=5.6815x-0.0242,r=0.9...
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| 关 键 词： | 硅钙钾肥 硫酸根 铬酸钡分光光度法 |
Determination of Water-soluble Sulfate in Silicon- calcium-potassium Fertilizer by Spectrophotometry |
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| ZHOU Mei-jiao,ZHU Yun-qin.Determination of Water-soluble Sulfate in Silicon- calcium-potassium Fertilizer by Spectrophotometry[J].Technology & Development of Chemical Industry,2011,40(12):35-37,53. |
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| Authors: | ZHOU Mei-jiao ZHU Yun-qin |
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| Affiliation: | (College of Chemistry and Chemical Engineering,Guizhou University,Guiyang,550025,China) |
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| Abstract: | Applied the insoluble potassium rocks and phosphorous gesso as raw material,the silicon-calcium-potassium fertilizer was prepared which contained water-soluble sulfate.Its content was one of important index to affect the product quality.The method of barium chromic acid spectrophotometry was used to determine the content of water-soluble sulfate.When visible absorbance was detected at a wavelength of 420nm and concentration of water-soluble sulfate at 20 ～ 160μg/mL.Sulfate had a linear relationship with absorption of CrO42-.The linear equation was y=5.6815x-0.0242 and the correlation coefficient was 0.9998.Relative standard deviation was better than 10%,and the standard addition recovery was 97% ～ 103%. |
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| Keywords: | silicon-calcium-potassium fertilizer sulfate barium chromic acid spectrophotometric method |
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