کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6339598 | 1620377 | 2014 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Aromatic organosulfates in atmospheric aerosols: Synthesis, characterization, and abundance
ترجمه فارسی عنوان
ارگانوسولفات آروماتیک در آئروسل های جوی: سنتز، مشخصه، و فراوانی
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کلمات کلیدی
سنتز استر سولفات، آئروسل در هوا، طیف سنجی جرمی، تولوئن،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علم هواشناسی
چکیده انگلیسی
Aromatic organosulfates are identified and quantified in fine particulate matter (PM2.5) from Lahore, Pakistan, Godavari, Nepal, and Pasadena, California. To support detection and quantification, authentic standards of phenyl sulfate, benzyl sulfate, 3- and 4-methylphenyl sulfate and 2-, 3-, and 4-methylbenzyl sulfate were synthesized. Authentic standards and aerosol samples were analyzed by ultra-performance liquid chromatography (UPLC) coupled to negative electrospray ionization (ESI) quadrupole time-of-flight (ToF) mass spectrometry. Benzyl sulfate was present in all three locations at concentrations ranging from 4 to 90 pg mâ3. Phenyl sulfate, methylphenyl sulfates and methylbenzyl sulfates were observed intermittently with abundances of 4 pg mâ3, 2-31 pg mâ3, 109 pg mâ3, respectively. Characteristic fragment ions of aromatic organosulfates include the sulfite radical (SO3â, m/z 80) and the sulfate radical (SO4â, m/z 96). Instrumental response factors of phenyl and benzyl sulfates varied by a factor of 4.3, indicating that structurally-similar organosulfates have significantly different instrumental responses and highlighting the need to develop authentic standards for absolute quantitation organosulfates. In an effort to better understand the sources of aromatic organosulfates to the atmosphere, chamber experiments with the precursor toluene were conducted under conditions that form biogenic organosulfates. Aromatic organosulfates were not detected in the chamber samples, suggesting that they form through different pathways, have different precursors (e.g. naphthalene or methylnaphthalene), or are emitted from primary sources.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Atmospheric Environment - Volume 94, September 2014, Pages 366-373
Journal: Atmospheric Environment - Volume 94, September 2014, Pages 366-373
نویسندگان
Sean Staudt, Shuvashish Kundu, Hans-Joachim Lehmler, Xianran He, Tianqu Cui, Ying-Hsuan Lin, Kasper Kristensen, Marianne Glasius, Xiaolu Zhang, Rodney J. Weber, Jason D. Surratt, Elizabeth A. Stone,