The measure can be applied to testing and analysis of wastewater with large flow quantity and single testing item as well as small flow quant...

• 既适用于小批量单一水质指标的测试分析,也适用于大批量且水质浓度变化幅度较大的情况。避免了因环境因素变化而采用其它控制图带来的不便和困难。