摘要
在对美国气溶胶飞行时间质谱仪(aerosol time-of-flight mass spectrometer,ATOFMS)和中国单颗粒气溶胶质谱仪(single particle aerosol mass spectrometer,SPAMS)前期研究调研的基础上,总结并比较了国内外飞行时间质谱(time-of-flight mass spectrometry,TOF-MS)研究中含硫酸盐、硝酸盐、铵盐、有机碳(OC)和元素碳(EC)等5种主要组分颗粒的典型提取条件.结合SPAMS单颗粒谱图的特点,本研究通过限定示踪离子,对5种主要组分的提取方法进行改进,提出了新的SPAMS组分示踪离子提取方法.以北京市2013年1月SPAMS实测数据为例,对不同提取方法的结果进行对比分析.并将本研究方法 SPAMS主要组分结果与离线滤膜样品的实验数据进行对比,验证了本研究所提出的优化方案的合理性.同时指出SPAMS在未来的应用研究中需考虑的因素及进一步深入的研究方向.
Based on preliminary studies by aerosol time-of-flight mass spectrometer( ATOFMS) and single particle aerosol mass spectrometer(SPAMS),typical methods for identifying the number of particles(or particle count) for five major components including sulfate,nitrate,ammonium,organic carbon(OC),and elemental carbon(EC) in China and abroad were summarized. In this study,combined with the characteristics of single particle mass spectrum by SPAMS,an optimized method is proposed. With field measurement using SPAMS during January 2013 in Beijing,particle counts of sulfate,nitrate,ammonium,OC,and EC determined by different methods were compared. The comparison with results of off-line filter analyses for these five components proved that the method proposed in this study is comparable and optimized. We also suggest factors needed to be considered in future application of SPAMS and other areas that require in-depth research.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2014年第11期4070-4077,共8页
Environmental Science
基金
国家自然科学基金创新研究群体项目(41121004)
国家自然科学基金重大项目(21190050)
环境模拟与污染控制国家重点实验室开放基金项目(13L02ESPC)
关键词
单颗粒气溶胶质谱仪
硫酸盐
硝酸盐
铵盐
有机碳
无机碳
定性方法
single particle aerosol mass spectrometer(SPAMS)
sulfate
nitrate
ammonium
organic carbon
elemental carbon
qualitative method