在线蒸馏连续流动注射分析法测定黑臭水体中的氨氮  

Determination of ammonia nitrogen in black and odorous waters by continuous flow analysis with online distillation system

作　　者：卞桂荣 沈建 Bian Guirong;Shen Jian(Wuhu City Environmental Monitoring Center Station,Wuhu Anhui 241000,China)

机构地区：[1]芜湖市环境监测中心站,安徽芜湖241000

出　　处：《环境与发展》2020年第11期99-100,共2页Environment & Development

摘　　要：采用在线蒸馏连续流动注射仪测定黑臭水体中的氨氮浓度,该方法灵敏度高,蒸馏过程全在密闭管路中进行,样品损失少,精密度和准确度都很好。在0~2.5mg/L范围内具有良好的线性关系,相关系数r=0.9997,检出限为0.02mg/L,加标回收率为97.8%~101.0%,有证标准物质的测定值均在参考值范围。该法操作简便,自动化程度高,检测结束直接得到浓度结果,大大提高了分析速率,减少了人工消耗,适用于大批量水样的分析。By continuous flow injection on-line distillation apparatus for determination of ammonia nitrogen in the black and odorous waters concentration,high sensitivity,the method of distillation process in airtight pipeline,loss of samples,the precision and accuracy are good, within 0 ~ 2.5 mg/L has a good linear relationship,the correlation coefficient is r=0.9997,the detection limit for standard addition recovery is 0.02 mg/L,the recovery rates were between 97.8% and 101.0%.This method is easy to operate,highly automated,and can directly obtain the concentration result after the test,which greatly improves the analysis rate and reduces the manual consumption, and is suitable for the analysis of large quantities of water samples.

关 键 词：氨氮 连续流动注射分析 在线蒸馏 黑臭水体 

分 类 号：X52[环境科学与工程—环境工程]