DOM Molecular Weight Fractionation and Fluorescence Quantum Yield Assessment Using a Coupled In-Line SEC Optical Property System
DOM Molecular Weight Fractionation and Fluorescence Quantum Yield Assessment Using a Coupled In-Line SEC Optical Property System
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使用耦合在线 SEC 光学特性系统进行 DOM 分子量分级和荧光量子产率评估
DOI:
10.1021/acsestwater.2c00318
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Rosario-Ortiz, Fernando L.
中科院分区:
文献类型:
--
作者:
Hanson, Blair;Wünsch, Urban;Buckley, Shelby;Fischer, Sarah;Leresche, Frank;Murphy, Kathleen;D’Andrilli, Juliana;Rosario-Ortiz, Fernando L.
Size exclusion chromatography (SEC) in combination with optical measurements has become a popular form of analysis to characterize dissolved organic matter (DOM) as a function of molecular size. Here, SEC coupled with in-line absorbance scans and fluorescence emission scans was utilized to derive apparent fluorescence quantum yield (Φf) as a function of molecular weight (MW) for DOM. Individual instrument-specific SEC-fluorescence detector correction factors were developed by comparison of an SEC-based excitation emission matrix (EEM) to an EEM generated by a calibrated benchtop fluorometer. The method was then applied to several sample sets to demonstrate how to measure the Φfof unknown DOM samples and to observe changes to Φffollowing a processing mechanism (ozonation). The Φfof riverine water samples and DOM fulvic acid isolates from Suwannee River and Pony Lake increased from < 0.5% to a maximum of ∼2.5–3% across the medium- to low-MW range. Following ozonation of PLFA, Φfincreased most notably in the large-MW fractions (elution volumes < 40 mL). Overall, this method provides a means by which highly fluorescent size fractions of DOM can be identified for more detailed analyses of chemical composition and its changes through different processing mechanisms.
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DOI:
10.1039/d1ew00320h
发表时间:
2022
期刊:
Environmental Science: Water Research & Technology
影响因子:
--
作者:
Sarah J. Fischer;M. Gonsior;J. Chorover;L. Powers;A. Hamilton;M. Ramirez;A. Torrents
通讯作者:
Sarah J. Fischer;M. Gonsior;J. Chorover;L. Powers;A. Hamilton;M. Ramirez;A. Torrents
影响因子:
12.8
作者:
Sydney L. Ulliman;J. Korak;K. Linden;F. Rosario‐Ortiz
通讯作者:
Sydney L. Ulliman;J. Korak;K. Linden;F. Rosario‐Ortiz
影响因子:
4.5
作者:
J. Korak;F. Rosario‐Ortiz;R. Summers
通讯作者:
R. Summers
影响因子:
8.8
作者:
P. Conte;Alessandro Piccolo
通讯作者:
Alessandro Piccolo
影响因子:
5
作者:
Leresche, Frank;Torres-Ruiz, Jeremy A.;Rosario-Ortiz, Fernando L.
通讯作者:
Rosario-Ortiz, Fernando L.