碳组分不同监测分析技术的比较

Comparison of Different Monitoring and Analysis Techniques for Carbon Components

采用在线监测和实验室分析方法,分别在热光透射法(TOT)NIOSH 5040、870升温协议和热光反射法(TOR)IMPROVE-A升温协议下测定PM 2.5中有机碳(OC)、元素碳(EC),并将各测定结果做比对分析。结果表明,在线监测(NIOSH 5040)与实验室分析(IMPROVE-A)结果的相关系数R>0.8,总体相关性较好,EC值差异略大;在线监测与实验室分析在NIOSH 870协议下TC测定值总体相近,OC与EC测定值略有差异;在线监测中NIOSH 5040协议下的OC测定值略低于870协议,EC测定值略高于870协议,日常监测中两种温度协议均可选择。

Organic carbon(OC)and elemental carbon(EC)in PM 2.5 were determined by NIOSH 5040、870 heating protocol thermo-optical transmission(TOT)for on-line monitoring and IMPROVE-A heating protocol thermal optical reflection(TOR)for laboratory analysis,respectively.By comparing and analyzing the test results,it showed that the correlation coefficient between on-line monitoring(NIOSH 5040)and laboratory analysis(IMPROVE-A)was more than 0.8,the overall correlation was good,the difference between EC values was slightly larger.Under NIOSH 870 protocol,TC values measured by on-line monitoring and laboratory analysis were generally similar,while OC values and EC values were slightly different.For on-line monitoring,OC values under NIOSH 5040 protocol were slightly lower than that of 870 protocol,while EC values were slightly higher than that of 870 protocol.Both temperature protocols were optional in daily monitoring.