To detect CODcr in waste water with microwave digestion-AEP titrimeter. To digest water sample using H2SO4-K2Cr2O7-KAl(SO4)2-(NH4)6Mo7O24 first, the best digestion condition was get. Carried on the opposite experiment through the microwave resolution and the traditional backflow resolution, not only discovered the former to be able to be complete the sample resolution, saved the massive time compared to the latter, raised the analysis speed greatly. The automatic electrometric titration and the manual titrate compare, can obtain better picks out limits, the accuracy, the accuracy and the returns-ratio.%样品的前处理采用微波消解,后用自动电位滴定仪测定废水中化学需氧量(CODcr).通过"硫酸-重铬酸钾-硫酸铝钾-钼酸铵"体系消解液对水样消解,选择出微波最佳消解条件.通过微波消解和传统的回流消解进行对比实验,发现前者不但能将样品消解完全,而且比后者节省大量的时间,大大提高分析效率.自动电位滴定与手工滴定相比,能得到更好的检出限、精密度、准确度和回收率.
展开▼
