| 碱性过硫酸钾氧化-紫外分光光度法测水体总氮 |
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| 引用本文： | 胡雪峰,沈铭能,许世远.碱性过硫酸钾氧化-紫外分光光度法测水体总氮[J].环境污染与防治,2002,24(1):40-41. |
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| 作者姓名： | 胡雪峰 沈铭能 许世远 |
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| 作者单位： | 1. 上海大学环境科学与工程系,上海,200072
2. 华东师范大学地理系,上海,200062 |
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| 基金项目： | 国家自然科学基金 (No.4983 10 70 )，上海市教委重点学科基金资助项目 |
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| 摘 要： | 碱性过硫酸钾氧化--紫外分光光度法所用消化剂K2S2O8在220nm处有很强的吸收峰，在消解过程中应确保其分解完全，否则即使其只有总量1%的残余，仍足以构成对比色测定的严重干扰。NaOH溶液在220nm处也有吸光度，但加盐酸中和后即减弱。消煮液的残余碱度对比色的干扰也可以同法消除。
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| 关 键 词： | 碱性过硫酸钾 氢氧化钠 220纳米 水体总氮 水质监测 氧化－紫外分光光度法 |
Determination of total nitrogen in water by alkaline potassium persulfate oxidation-UV spectro photo metric method |
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| Hu Xuefeng,et al..Determination of total nitrogen in water by alkaline potassium persulfate oxidation-UV spectro photo metric method[J].Environmental Pollution & Control,2002,24(1):40-41. |
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| Authors: | Hu Xuefeng |
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| Institution: | Hu Xuefeng,et al. Department of Environmental Science and Engineering,Shanghai University,Shanghai,200072\, |
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| Abstract: | K\-2S\-2O\-8, which is used as a digestive agent in the method, can strongly absorb 220 nm UV\|ray. Complete decomposition of it into K\-2SO\-4 should be ensured before colorimetric determination; otherwise, the remnants, even only one percent of the total, will severely disturbed the analysis. NaOH solution also absorbs 220 nm UV\|ray; however, such disturbance absorbance will get weak if it is neutralized by HCl. The disturbance of the remnant alkaline in the digestive solution to colorimetric estimation will be eliminated with the method. |
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| Keywords: | K\-2S\-2O\-8\ NaOH\ 220 nm UV\|ray |
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