利用 IC-ICP-MS 对北极雪中的无机碘和溴进行皮克/克级的标示

IF 2.5 4区 化学 Q3 CHEMISTRY, ANALYTICAL
Stefano Frassati, Elena Barbaro, Claudia Rossetti, Giulio Cozzi, Clara Turetta, Federico Scoto, Marco Roman, Matteo Feltracco, Kitae Kim, Carlo Barbante, Andrea Gambaro, Andrea Spolaor
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引用次数: 0

摘要

碘和溴在极地大气化学中发挥着核心作用:碘会影响大气氧化能力并产生云凝结核,而溴则参与臭氧消耗反应,即所谓的溴爆炸。在这里,我们通过将离子色谱系统(IC)与电感耦合等离子体扇场质谱仪(ICP-SFMS)相结合,介绍了一种非常灵敏的溴和碘的分析方法。我们的检测限(LOD)达到了亚微克/克(pg g-1),分别为 I- 0.4 pg g-1、IO3- 0.8 pg g-1、Br- 4 pg g-1、BrO3- 1 pg g-1。与其他研究报告的检测限相比,这些数值最多可降低 30 倍。该方法使用斯瓦尔巴群岛的深雪样本进行了验证,这些样本是在极夜结束时采集的,用于定量分析各种氧化化合物的季节性最小值。今后,这种方法可能会在冰芯和雪的古气候研究以及冰化学研究中发挥作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Inorganic iodine and bromine speciation in Arctic snow at picogram-per-grams levels by IC-ICP-MS
Iodine and bromine play central roles in polar atmospheric chemistry: iodine influences the atmospheric oxidative capacity and can generate cloud condensation nuclei, while bromine participates in ozone depletion reactions, known as bromine explosions. Here we present a very sensitive analytical method for Br and I speciation by coupling the ion chromatography system (IC) with an inductively coupled plasma sector field mass spectrometer (ICP-SFMS). We achieved sub-picogram-per gram (pg g−1) as limits of detection (LODs) ranging from 0.4 pg g−1 for I−, 0.8 pg g−1 for IO3−, 4 pg g−1 for Br−, and 1 pg g−1 for BrO3−, respectively. These values represent a decrease of up to 30 times compared to the LODs reported in other studies. The method was validated using deep snow samples from the Svalbard Islands, collected at the end of the polar night to quantify various oxidized compounds during their seasonal minimum. In the future, this method could prove useful in the paleoclimatic study of ice cores and snow, as well as in ice chemistry research.
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来源期刊
Journal of Analytical Science and Technology
Journal of Analytical Science and Technology Environmental Science-General Environmental Science
CiteScore
4.00
自引率
4.20%
发文量
39
审稿时长
13 weeks
期刊介绍: The Journal of Analytical Science and Technology (JAST) is a fully open access peer-reviewed scientific journal published under the brand SpringerOpen. JAST was launched by Korea Basic Science Institute in 2010. JAST publishes original research and review articles on all aspects of analytical principles, techniques, methods, procedures, and equipment. JAST’s vision is to be an internationally influential and widely read analytical science journal. Our mission is to inform and stimulate researchers to make significant professional achievements in science. We aim to provide scientists, researchers, and students worldwide with unlimited access to the latest advances of the analytical sciences.
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