高氯低有机物废水CODCr测定方法的标准研究

程龙军,彭娟,杨柳荫,安晓英

Determination method standard of CODCr in wastewater with high chlorine and low organic matter

Longjun CHENG,Juan PENG,Liuyin YANG,Xiaoying AN

表4 废水样品精密度试验和加标回收率试验结果

Table 4 The results of precision experiment and recovery experiment of waste water samples

序号 1 2 3 4 5 6 7 8 9 10 11 平均值 RSD/% 样品CODCr/(mg·L-1) 19.8 22.6 22.6 25.3 25.3 22.6 19.8 22.6 19.8 22.6 22.6 22.3 8.65 加标样CODCr/(mg·L-1) 52.9 50.1 55.6 52.9 54.5 55.6 53.6 3.92 加标回收率/% 91.8 83.4 99.9 91.8 96.6 99.9 93.9 6.71