Molecular Characterization of Dissolved Organic Nitrogen during Anoxic/Oxic and Anammox Processes Using ESI FT–ICR MS

2021 ◽  
Author(s):  
Li Zhang ◽  
Kexin Zheng ◽  
Yueping Wang ◽  
Yongzhen Peng
Keyword(s):  
Molecular Characterization ◽  
Dissolved Organic Nitrogen ◽  
Organic Nitrogen ◽  
Ft Icr Ms ◽  
Ft Icr

Molecular characterization of size-segregated organic aerosols in the urban boundary layer in wintertime Beijing by FT-ICR MS

2021 ◽  
Author(s):  
Qiaorong Xie ◽  
Sihui Su ◽  
Shuang Chen ◽  
Qiang Zhang ◽  
Siyao Yue ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Size Distribution ◽  
Molecular Characterization ◽  
Organic Aerosols ◽  
Urban Boundary Layer ◽  
Vertical Profiles ◽  
Unique Information ◽  
Ft Icr Ms ◽  
Ft Icr

Our study provides unique information on the vertical profiles and size distribution of urban organic aerosols by FT-ICR MS.

scholarly journals Comparison of different solid phase extraction sorbents for the qualitative assessment of dissolved organic nitrogen in freshwater samples using FT-ICR-MS

2018 ◽  
Author(s):  
Patrick E. Stücheli ◽  
Jutta Niggemann ◽  
Carsten J. Schubert
Keyword(s):  
Extraction Method ◽  
Dissolved Organic Nitrogen ◽  
Organic Nitrogen ◽  
Solid Phase ◽  
Reversed Phase ◽  
Nitrogen Compounds ◽  
Phase Extraction ◽  
Molecular Characterisation ◽  
Ft Icr Ms ◽  
Ft Icr

Fate and reactivity of dissolved organic matter (DOM) is directly linked to its chemical composition. Therefore, molecular characterisation, for example using Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS), is used for a better understanding of those factors. To study organic compounds in the water column, an efficient extraction method is important. The commonly used extraction method for FT-ICR-MS is solid phase extraction (SPE) using a reversed-phase sorbent (BondElut PPL). But this method, to the best of our knowledge, was not evaluated for its ability to extract organic nitrogen compounds which are important building blocks of life and therefore an important fraction of DOM. In this study, several solid phase sorbents were tested for their ability to extract organic nitrogen compounds from water samples of natural aqueous environments. Different cartridges concerning their retention mechanism and pore size were tested. Three cartridges with different extraction mechanism (reversed phase, cation exchange or a mixture of both) or different pore size were tested. Except for one sorbent type, which heavily contaminated the samples with organic molecules, the tested cartridges leached neither a significant amount of dissolved organic carbon (DOC) nor dissolved organic nitrogen (DON). The sorbents were tested with lake water to be able to investigate their functionality in real conditions. It could be shown, that the molecular composition of the sample should be considered for the choice of the sorbent material. Additionally, it was shown that a mixed-bed sorbent is a valuable complementary SPE sorbent for the molecular characterisation of lacustrine samples using FT-ICR-MS and it might also be useful for a quantitative extraction. Furthermore, it could be shown that HyperSep Retain CX sorbent allows to extract a broader range of organic nitrogen compounds leading to a more comprehensive data set for investigating organic nitrogen compounds in lakes using FT-ICR-MS.

Characterization of dissolved organic nitrogen in wet deposition from Lake Erhai basin by using ultrahigh resolution FT-ICR mass spectrometry

Chemosphere ◽  
2016 ◽  
Vol 156 ◽  
pp. 438-445 ◽  
Author(s):  
Shuang Feng ◽  
Li Zhang ◽  
Shengrui Wang ◽  
Alexey B. Nadykto ◽  
Yisheng Xu ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Wet Deposition ◽  
Dissolved Organic Nitrogen ◽  
Organic Nitrogen ◽  
Ultrahigh Resolution ◽  
Lake Erhai ◽  
Ft Icr

Molecular characterization of sulfur compounds in some specieal sulfur-rich Chinese crude oils by FT-ICR MS

2013 ◽  
Vol 57 (6) ◽  
pp. 1158-1167 ◽  
Author(s):  
Hong Lu ◽  
Quan Shi ◽  
QingLin Ma ◽  
Yang Shi ◽  
JinZhong Liu ◽  
...  
Keyword(s):  
Molecular Characterization ◽  
Sulfur Compounds ◽  
Crude Oils ◽  
Ft Icr Ms ◽  
Ft Icr

scholarly journals Development of Standard for Quantitative Molecular Characterization of Dissolved Organic Matter by FT-ICR MS

2020 ◽  
Author(s):  
Chen He ◽  
Yahe Zhang ◽  
Yunyun Li ◽  
Xiaocun Zhuo ◽  
Yuguo Li ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Molecular Characterization ◽  
Ft Icr Ms ◽  
Ft Icr
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