A water probe for direct pH measurement of individual particles via micro-Raman spectroscopy
文献类型：期刊论文
| 作者 | Cui, Xiaoyu1,4; Tang, Mingjin2,3 ; Zhu, Tong1
|
| 刊名 | JOURNAL OF ENVIRONMENTAL SCIENCES
 |
| 出版日期 | 2025-03-01 |
| 卷号 | 149页码:200-208 |
| 关键词 | Particle pH Water probe Standard spectral library Micro-Raman spectroscopy Direct measurement |
| ISSN号 | 1001-0742 |
| DOI | 10.1016/j.jes.2023.10.037 |
| 英文摘要 | The acidity of atmospheric aerosols influences fundamental physicochemical processes that affect climate and human health. We recently developed a novel and facile water-probebased method for directly measuring of the pH for micrometer-size droplets, providing a promising technique to better understand aerosol acidity in the atmosphere. The complex chemical composition of fine particles in the ambient air, however, poses certain challenges to using a water-probe for pH measurement, including interference from interactions between compositions and the influence of similar compositions on water structure. To explore the universality of our method, it was employed to measure the pH of ammonium, nitrate, carbonate, sulfate, and chloride particles. The pH of particles covering a broad range (0-14) were accurately determined, thereby demonstrating that our method can be generally applied, even to alkaline particles. Furthermore, a standard spectral library was developed by integrating the standard spectra of common hydrated ions extracted through the waterprobe. The library can be employed to identify particle composition and overcome the spectral overlap problem resulting from similar effects. Using the spectral library, all ions were identified and their concentrations were determined, in tum allowing successful pH measurement of multicomponent (ammonium-sulfate-nitrate-chloride) particles. Insights into the synergistic effect of Cl-, NO3 -, and NH4 + depletion obtained with our approach revealed the interplay between pH and volatile partitioning. Given the ubiquity of component partitioning and pH variation in particles, the water probe may provide a new perspective on the underlying mechanisms of aerosol aging and aerosol-cloud interaction. (c) 2024 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V. |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001203750900001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/77142]  |
| 专题 | 有机地球化学国家重点实验室 |
| 通讯作者 | Zhu, Tong |
| 作者单位 | 1.Peking Univ, Coll Environm Sci & Engn, BIC ESAT & SKL ESPC, Beijing 100871, Peoples R China 2.Chinese Acad Sci, State Key Lab Organ Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Key Lab Environm Protect & Resources Uti, Guangzhou 510640, Peoples R China 4.Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300072, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cui, Xiaoyu,Tang, Mingjin,Zhu, Tong. A water probe for direct pH measurement of individual particles via micro-Raman spectroscopy[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2025,149:200-208. |
| APA | Cui, Xiaoyu,Tang, Mingjin,&Zhu, Tong.(2025).A water probe for direct pH measurement of individual particles via micro-Raman spectroscopy.JOURNAL OF ENVIRONMENTAL SCIENCES,149,200-208. |
| MLA | Cui, Xiaoyu,et al."A water probe for direct pH measurement of individual particles via micro-Raman spectroscopy".JOURNAL OF ENVIRONMENTAL SCIENCES 149(2025):200-208. |
入库方式： OAI收割
来源：广州地球化学研究所
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