一种自制软X 射线颗粒中和器与同类商业化中和器的性能比较
	#br#

大气与环境光学学报 ›› 2020, Vol. 15 ›› Issue (6): 438-447.

• “纳米颗粒物在线测量技术”专辑 • 上一篇下一篇

一种自制软X 射线颗粒中和器与同类商业化中和器的性能比较 #br#

梁宝玲1, 许汉冰2∗, 赵军1;3;4;5∗

1 中山大学大气科学学院, 广东珠海 519082; 2 中山大学公共实验教学中心, 广东广州 510275; 3 南方海洋科学与工程广东省实验室 (珠海), 广东珠海 519082; 4 广东省气候变化与自然灾害研究重点实验室, 广东广州 510275; 5 华南气候环境与全球变化综合观测开放实验站, 广东广州 510275

收稿日期:2020-08-12 修回日期:2020-09-24 出版日期:2020-11-28 发布日期:2020-12-10
通讯作者: E-mail:xuhb@mail.sysu.edu.cn; zhaojun23@mail.sysu.edu.cn E-mail:zhaojun23@mail.sysu.edu.cn
作者简介:梁宝玲 (1995- ), 女, 广东番禺人, 博士研究生, 主要从事大气化学和气溶胶方面的研究。 E-mail: liangbl3@mail2.sysu.edu.cn
基金资助:
Supported by the National Key Research and Development Program of China (国家重点研发计划课题, 2017YFC0209502), Science and Technology Innovation Committee of Guangzhou (广州市科技创新发展专项, 201803030010)

Performance Comparison Between a Custom-Made Soft X-Ray Neutralizer and a Commercial Counterpart #br#

LIANG Baoling1, XU Hanbing2∗, ZHAO Jun1;3;4;5∗ ^#br#

1 School of Atmospheric Sciences, Sun Yat-sen University, Zhuhai 519082, China; 2 Public Experimental Teaching Center, Sun Yat-sen University, Guangzhou 510275, China; 3 Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, China; 4 Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, Guangzhou 510275, China; 5 Guangdong Provincial Observation and Research Station for Climate Environment and Air Quality Change in the Pearl River Estuary, Guangzhou 510275, China

Received:2020-08-12 Revised:2020-09-24 Published:2020-11-28 Online:2020-12-10
Contact: Jun Zhao E-mail:zhaojun23@mail.sysu.edu.cn
Supported by:
Supported by the National Key Research and Development Program of China (国家重点研发计划课题, 2017YFC0209502), Science and Technology Innovation Committee of Guangzhou (广州市科技创新发展专项, 201803030010)

摘要/Abstract

摘要： 运用扫描电迁移率粒径谱仪对比测试自制软 X 射线中和器 (CM-SXR) 与商业化 TSI 高级气溶胶中和器 (TSI-SXR)。研究结果表明, 对于 20 nm 以上颗粒物, 在差分电迁移率分析仪 (SMPS) 筛分负电荷模式下, 对不同颗粒物 (聚苯乙烯乳胶颗粒、硫酸铵及氯化钠颗粒、室内空气颗粒) 的测试均显示, 使用自制中和器比使用 TSI 中和器测量所得的颗粒物数浓度要高, 浓度差异最大达 40%; 而在筛分正电荷模式下, 其结果正好相反, 最大浓度差达 77%。造成上述差异的原因可能是由于软 X 射线在两种中和器中放置位置不同而导致放射程度不同以及停留时间存在差异, 从而最终导致中和器中颗粒物正负电荷分布不同。

关键词: 软 X 射线, 中和器；大气气溶胶, 粒径分布, 颗粒中和

Abstract: Performance comparison between a custom-made soft X-ray neutralizer (CM-SXR) and a commercial counterpart (TSI-SXR, advanced aerosol neutralizer, model 3088, TSI, USA) is made by using a scanning mobility particle sizer (SMPS). The results show that for all the tested particles (i.e., Polystyrene latex particles, ammonium sulfate particles, sodium chloride particles, and room air particles) with a size greater than 20 nm, the particle number concentration measured by CM-SXR is higher than that measured by TSI-SXR when the differential mobility analyzer (DMA) is operated under the negatively-charged particle mode, and the differences can be up to 40%. However, opposite results have been found when the DMA is operated at the positively-charged mode, that is the particle number concentration measured by TSI-SXR is higher than that measured by CM-SXR and the differences are up to 77%. Possible reasons accounting for the above differences are discussed, and it is deduced that the mounting position of the soft X-ray in the two neutralizers, which results in different exposures of the X-ray and the differences of the residence time when the sample passes the two different neutralizers, is likely the main reason leading to different positively- and negatively-charged particle distribution inside the neutralizers.

Key words: soft X-ray, neutralizer, atmospheric aerosols, size distribution, particle neutralizing

中图分类号:

X851

梁宝玲, 许汉冰∗, 赵军, ∗. 一种自制软X 射线颗粒中和器与同类商业化中和器的性能比较 #br#[J]. 大气与环境光学学报, 2020, 15(6): 438-447.

LIANG Baoling, XU Hanbing∗, ZHAO Jun, ∗. Performance Comparison Between a Custom-Made Soft X-Ray Neutralizer and a Commercial Counterpart #br# [J]. Journal of Atmospheric and Environmental Optics, 2020, 15(6): 438-447.

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一种自制软X 射线颗粒中和器与同类商业化中和器的性能比较 #br#

Performance Comparison Between a Custom-Made Soft X-Ray Neutralizer and a Commercial Counterpart #br#

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