大气自动监测校准中气体流量对仪器示值误差的影响及控制  

The Influence and Control of Gas Flow Rate In The Instrument Indication Error In The Atmospheric Automatic Monitoring Calibration

作　　者：徐锦昌[1] 吴汉冲[1] 

机构地区：[1]启东市环境监测站,江苏启东226200

出　　处：《中国环境监测》2008年第4期42-45,41,共5页Environmental Monitoring in China

摘　　要：研究了大气自动监测系统中标准气、校准气以及零空气的流量大小引起仪器示值误差及对校准曲线质量的影响,提出了重点控制标气流量是减小仪器示值误差的关键,从而解决了低浓度校准点仪器示值偏低、误差大及校准曲线截距大的技术难点,提高了大气自动监测中多点校准质量和监测结果的准确性。The paper studies the instrument indication error coming from the flow rate of standard gas, calibration gas and zero gas in Atmospheric automatic monitoring system and the influence of the instrument indication error on the quality of the calibration curve. The paper puts forward that controlling the standard gas flow rate is the key to decreasing the instrument indication error, thereby resolving the technical difficulties of the lowness and the error of instrumental indicating value and the big intercept of the calibration curve at the light concentration calibration point, improving the quality of the multi - point calibration and the accuracy of the monitoring results in the atmospheric automatic monitoring.

关 键 词：大气自动监测 二氧化硫 氮氧化物 流量控制 仪器示值误差 

分 类 号：X831[环境科学与工程—环境工程]