预蒸馏-纳氏分光光度法测定水质氨氮预蒸馏方法的优化

doi:10.19286/j.cnki.cci.2026.04.025

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摘要

针对纳氏试剂分光光度法测定水质氨氮中预蒸馏后样品溶液的pH值对测定结果的影响进行了研究。研究发现，预蒸馏后的样品溶液pH值与分析结果密切相关，在一定范围内，样品溶液显色后的吸光度随着显色溶液pH 值的增大而增大，当 pH 值增大至一定程度时，吸光度才基本趋于稳定。当预蒸馏样品的pH值＞10时，测定结果较为准确可靠。当预蒸馏样品的pH值＞9时，加标样品的加标回收率＞95%。

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	王博
	吴维亚

关键词 ：氨氮, 纳氏试剂, pH 值, 吸光度

Abstract：

The experimental research on the determination of pH value of pre distilled sample solution in water quality ammonia nitrogen by Nessler's reagent spectrophotometry were conducted. Research has found that, the pH value of the pre distilled sample solution is closely related to the analysis results. Within a certain range, the absorbance of the sample solution after color development increases with the increase of the pH value of the color development solution. When the pH value increases to a certain extent, the absorbance basically stabilizes. When the pH value of the pre distilled sample is greater than 10, the measurement results are more accurate and reliable. When the pH value of the pre distilled sample is greater than 9, the spiked recovery rate of the spiked sample is greater than 95%.

Key words： ammonia nitrogen Nessler's reagent pH value absorbance

通讯作者: 吴维亚（ 1973— ），女，河北石家庄人，工程师。

作者简介: 王博（ 1986— ），女，吉林吉林人，工程师。

引用本文:

王博，吴维亚. 预蒸馏-纳氏分光光度法测定水质氨氮预蒸馏方法的优化[J]. 煤炭与化工, 2026, 49(4): 124-127. Wang Bo, Wu Weiya. Optimization of pre distillation method for determining ammonia nitrogen in water quality using Nessler's spectrophotometry. CCI, 2026, 49(4): 124-127.

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http://www.mtyhg.com.cn/CN/10.19286/j.cnki.cci.2026.04.025 或 http://www.mtyhg.com.cn/CN/Y2026/V49/I4/124

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