FTIR法测定NO、SO_(2)、CO三组分气体标准物质含量校准曲线的研究  

Research on the calibration curve for measuring the content of NO,SO_(2),and CO gas reference materials by FTIR

作　　者：汪圣甲 李剑 夏春 刘学刚 张宝方 程莎 Wang Shengjia;Li Jian;Xia Chun;Liu Xuegang;Zhang Baofang;Cheng Sha(Qingdao Institute of Measurement Technology,Qingdao 266101,China;Qingdao Product Quality Testing Research Institute,Qingdao 266101,China)

机构地区：[1]青岛市计量技术研究院,青岛266101 [2]青岛市产品质量检验研究院,青岛266101

出　　处：《分析仪器》2024年第6期72-77,共6页Analytical Instrumentation

基　　金：山东计量测试学会科技项目(2022KJ46)。

摘　　要：校准曲线法是气体标准物质量值核查的常用方法,对气体标准物质的质量控制具有重要意义。基于动态稀释法,在(100~1000)μmol/mol范围内配制了10个浓度的NO、SO_(2)、CO混合气体,采用傅里叶变换红外光谱系统(FTIR)进行测量,建立了仪器响应值与浓度量值对应的校准曲线,并进行了准确性检验和稳定性检验。结果表明:NO、SO_(2)、CO_(3)种气体的校准曲线斜率分别为:0.9795、1.0117、0.9941,相关系数R2均为1,各浓度点与理论浓度的相对偏差均小于±1%,校准曲线具有良好的准确性和长期稳定性。The calibration curve method is a commonly used method for verifying the quantity value of gas reference materials,which is of great significance for the quality control of gas reference materials.A series of mixed gases of NO,SO_(2)and CO with different concentrations ranging from 100μmol/mol to 1000μmol/mol were prepared based on dynamic dilution method,of which the analyses were carried out by Fourier transform infrared spectroscopy(FTIR).Besides,the calibration curves corresponding to signal values and gas concentrations were established,the accuracy and stability were analyzed.The results indicated that the calibration curves for NO,SO_(2),and CO have slopes of 0.9795,1.0117,and 0.9941,respectively,with correlation coefficients R2 of 1.The relative deviations between each gas concentration and the theoretical concentration were less than±1%,and the calibration curve showed good accuracy and long-term stability.

关 键 词：NO SO_(2) CO FTIR 校准曲线 标准物质 

分 类 号：X831[环境科学与工程—环境工程] O657.33[理学—分析化学]