重金属铅在线监测仪器性能对比研究

Performance Comparison for Online Lead Monitoring Instruments

污染源在线监测仪器的准确性、实时性、连续性与污染源在线监测系统数据可靠性紧密相关。选取4个不同品牌的铅在线监测仪器,综合评价在线测定性能。结果表明,3种铅在线监测仪器的准确度小于10%,4种铅在线监测仪器的零点漂移、量程漂移、重复性误差均小于5%,定量下限小于0.05 mg/L,能较好地应用于铅的在线监测。

The accuracy, stability and continuity of online monitoring instruments have closely related with the reliability of online monitoring system. Four different online lead monitoring instruments were chosen to comprehensively evaluate their monitoring performances. The results indicated that three online monitoring instruments＇ accuracy were less than 10%, while the zero drift, span drift, repeatability error and the detection limit of the four tested online monitoring instruments were less than 5%, 5%, 5% and 0. 05 mg/L, respectively.