| 水杨酸分光光度法测定水中的NO_3~- |
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| 引用本文： | 邓强,汤颖,陈刚,董晓飞. 水杨酸分光光度法测定水中的NO_3~-[J]. 安徽农业科学, 2010, 38(4): 1676-1677. DOI: 10.3969/j.issn.0517-6611.2010.04.007 |
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| 作者姓名： | 邓强 汤颖 陈刚 董晓飞 |
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| 作者单位： | 西安石油大学化学化工学院,陕西西安,710065;西安石油大学化学化工学院,陕西西安,710065;西安石油大学化学化工学院,陕西西安,710065;西安石油大学化学化工学院,陕西西安,710065 |
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| 基金项目： | 国家自然科学基金项目(50874092);;西安石油大学博士科研启动项目(Z08009) |
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| 摘 要： | 以水杨酸为显色剂,建立分光光度法测定水中NO3-含量的方法。结果表明,NO3-含量的最佳测定条件为：吸收波长410nm,1.0ml浓硫酸,1.0ml20% NaOH溶液,显色时间20min。此条件下,NO3-含量在0.5～8.0mg/L范围内遵循比尔定律。NO3-的最低检出限为0.1mg/L,加标回收率为98.0%～102.0%。
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| 关 键 词： | NO_3~- 水杨酸 分光光度法 |
Determination on NO_3~- in Water by Spectrophotometry with Salicylic Acid |
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| DENG Qiang et al. Determination on NO_3~- in Water by Spectrophotometry with Salicylic Acid[J]. Journal of Anhui Agricultural Sciences, 2010, 38(4): 1676-1677. DOI: 10.3969/j.issn.0517-6611.2010.04.007 |
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| Authors: | DENG Qiang et al |
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| Affiliation: | Chemistry and Chemical Engineering College of Xi'an Shiyou University;Xi'an;Shaanxi 710065 |
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| Abstract: | With salicylic acid as the chromogenic reagent,the determination method on NO 3-content in water by spectrophotometry was established.The results showed that the optimum determination conditions for NO 3-content was absorption wavelength of 410 nm with 1.0 ml concentrated sulfuric acid,1.0 ml 20% NaOH solution and coloration time of 20 min.Under this condition,NO 3-content followed the beer's law in 0.5-8.0 mg/L.The lowest detection of NO 3-was 0.1 mg/L with recovery of standard addition of 98.0%-102.0%. |
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| Keywords: | NO3- Salicylic acid Spectrophotometry |
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