水质样品分析中pH值平均值的计算探讨

Discussion on Calculation of Average pH Value in Water Quality Sample Analysis

pH值是日常水质样品检测中经常检测的项目,论文从pH值原理分析及实验验证,对不同情况水质样品中的pH值平均值的计算办法进行了探索。结果显示,对于同一水样多次测定及平行水样测定的pH值平均值可用其算术平均值计,简单、方便、计算结果符合实际情况。而对于pH值差异较大的样本以及其它情况的复杂样本,需要考虑酸碱中和、电离平衡、溶液缓冲等因素的影响。

pH value is a frequently detected item in daily water quality sample testing based on the analysis of the principle of pH value and the experimental verification.The calculation method of the average pH value of water samples under different conditions was explored.The results showed that the average pH value of the same water sample can be measured by the arithmetic mean,which was simple,convenient and the calculation results accord with the actual situation.For the samples with large pH difference and other complicated samples,the factors such as acid-base neutralization,ionization equilibrium and solution buffering should be considered.