饮用水中暂时硬度的检测方法探究

Study on Testing Method of Temporary Hardness in Drinking Water

安徽区域引江济淮工程的开展引起的水质变化,使得暂时硬度成为了重要监测指标。本文选取安徽M市6个水厂的出厂水作为研究对象,采用碱度法和煮沸法测定水体中的暂时硬度,根据检测结果比对这两种分析方法的适用性。结果表明,针对该市出厂水水样,碱度法在扣除钾盐和钠盐造成的误差后,与煮沸法测得的暂时硬度结果相近,测得结果差值均在4 mg/L以内。因此,两种方法都可对适用于饮用水中的暂时硬度指标的检测。

Temporary hardness has become an important monitoring index due to the change of water quality caused by the project of Changjiang river diversion to Huaihe River in Anhui region.The ex-factory water of 6 water plants in M City was selected as the research object,and the alkalinity method and boiling method were used to determine the temporary hardness in water bodies.The applicability of these two analysis methods was compared according to the test results.The results showed that the alkalinity method,after deducting the error caused by potassium salt and sodium salt,was similar to the temporary hardness measured by boiling method.And the difference of temporary hardness measured by alkalinity method and boiling method for the same water sample was less than 4 mg/L.Therefore,both methods can be used to detect the temporary hardness index in drinking water.