COD测定仪法测定不同水样COD消解时间的差异性

丁佳

引用本文:	丁佳.COD测定仪法测定不同水样COD消解时间的差异性[J].环境监控与预警,2015,7(6):42-45
	DING Jia.Study on Differential Digestion Times of COD in Different Water Samples by the COD Analyzer[J].Environmental Monitoring and Forewarning,2015,7(6):42-45

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COD测定仪法测定不同水样COD消解时间的差异性
丁佳
绍兴市环境监测中心站，浙江绍兴 312000

摘要:

通过实验证实COD测定仪法具有较好的精密度和准确性，与标准回流法的分析结果比较，相对误差为-3.37%~1.41%，具有替代标准回流法的可行性。由于水样性质不同，所需最佳消解时间不同，通过比较不同消解时间下COD测定的结果，得到COD测定仪法测定水中COD所需的最佳消解时间分别为：工业废水60 min，生活污水和地表水90 min。

关键词: COD测定仪法消解时间工业废水生活污水地表水

DOI：

分类号:O657.32

基金项目:

Study on Differential Digestion Times of COD in Different Water Samples by the COD Analyzer

DING Jia

Shaoxing Environmental Monitoring Center, Shaoxing, Zhejiang 312000, China

Abstract:

The experiment confirmed that the COD analyzer had good precision and accuracy. Compared with the standard reflux method, the relative errors were ranged from -3.37% to 1.41%. It could be used as an alternative to the standard reflux method. Due to the difference in the nature of water samples, the optimal COD digestion time is different. By comparing the COD results at different digestion times, the optimal digestion times using the COD analyzer were 60, 90, and 90 min for industrial waste water, domestic wastewater, and surface water, respectively. 〖WTHZ〗Key words:〖WTBZ〗COD analyzer; Digestion time; Industrial wastewater; Domestic sewerage; Surface water

Key words: COD analyzer Digestion time Industrial wastewater Domestic sewerage Surface water