Effects of pretreatment temperature on the analysis of size‐fractionated aerosol particles using ToF‐SIMS,Surface and Interface Analysis

当前位置： X-MOL 学术 › Surf. Interface Anal. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Effects of pretreatment temperature on the analysis of size‐fractionated aerosol particles using ToF‐SIMS
Surface and Interface Analysis ( IF 1.6 ) Pub Date : 2020-01-27 , DOI: 10.1002/sia.6751
Jinze Li ₁ , Wenjing Xie ₂ , Lu‐Tao Weng _{1,

3} , Chak K. Chan ₄ , Chi‐Ming Chan _{1,

2}

Affiliation

Size‐fractionated aerosol particles were collected with a MOUDI 10‐stage cascade impactor from an urban roadside place in a downtown area of Hong Kong. Fine aerosol particulate samples from stage 6 (aerodynamic particle diameter between 0.56 and 1 μm) and stage 9 (aerodynamic particle diameter between 0.10 and 0.18 μm) were pretreated at a chosen temperature, including −100°C, −50°C, 25°C, and 60°C, in a load lock chamber and then analyzed using time‐of‐flight secondary ion mass spectrometry (ToF‐SIMS) at the same temperature (−100°C). Principal component analysis (PCA) was applied to further analyze ToF‐SIMS spectra of aerosol particles with different pretreatment temperatures from two selected stages. ToF‐SIMS results showed that the intensities of aliphatic hydrocarbon ions such as C₄H₇⁺ and C₄H₉⁺ and amine ions such as C₂H₈N⁺ and C₄H₁₂N⁺ decreased with an increase of the pretreatment temperature under ultrahigh vacuum conditions. We have shown that analyses of this type of aerosol particles using ToF‐SIMS should not be conducted at ambient temperature but at low temperature (eg, −50°C). In addition, we also developed a procedure that can be used to analyze aerosol particle samples under ultrahigh vacuum environment.

更新日期：2020-01-27

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11