摘要
水样的化学需氧量,可由于加入氧化剂的种类及浓度,反应溶液的酸度,反应温度和时间,以及催化剂的有无而获得不同的结果。因此,化学需氧量亦是一个条件性的指标,必须严格按操作步骤进行。
The COD of water sampling may have different results varying from kinds and concentrations of oxidizing agent, acidity of reaction solution, reaction temperature and time and ff there are catalysts. Therefore, COD is a conditional indicator, and strict operation procedure must be followed.
出处
《内蒙古环境科学》
2007年第2期109-109,112,共2页
Inner Mongolia Environmental Protection
关键词
化学需氧量
标定
偏高
偏低
Chemical oxygen demand (COD)
standardized
pretty high
pretty low