The Li+ Lab @UNH
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Welcome to the Li+ Group 
Department of Chemistry
​University of New Hampshire
Picture
Back row: Prof. Jia Jia, Nicole Heath,  Alec Espinola,  Hayden,  Nicholas Allen, Prof. Anyin Li
Front row: Shan Chen, 
Huishan Li,  Taoqing Wang. Dr. Mengtian Li
Spring 2019

​Mass Spectromentry
Electrospray is one of the most popular ionization methods for mass spectrometry (ESI-MS). Despite being routinely applied in the analysis of organic and biological molecules, it has many limitations that are usually addressed by additional efforts in sample preparation. We lack thorough understanding about these limitations. 
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The Li+ group has been focused on a few fundamental questions regarding ESI-MS. Where are the limits for the lowest flow rate and ionization current? What is, and how to generate the smallest possible initial charged droplet? What are the characteristics of an "ideal" ESI source and how can we build one? We believe these questions will lead us to expand our knowledge, and eventually to overcome the limitations one by one.


Research in my group has developed a few new approaches to conduct and study ESI-MS. Fundamentally new ESI approaches, such as sub-channel regime and femtoampere mode ESI, have been discovered. These developed methods provide superior performance for the analysis of hydrophilic compounds such as protein, glycan, and glycosylated compounds.
Read more


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​Media Reports on the Types of Research We Do
  1. Reflections on a Mass Spectrometry Career: A Retrospective by Prof. Li
  2. Industry Collaboration to Advance Research Technology
  3. Fundamentally New Approaches for On-demand Ionization Mass Spectrometry

News

  • 2025/07: The group signs a Research Collaborative Agreement with Genentech to investigate quantitative mass spectrometry methods for new modality drugs.
  • 2025/06: Prof. Li presents on the topic of "Fundamentals of Electrospray Ionization" in the Fundamental Interest Group Workshop at the ASMS conference in Baltimore.
  • 2025/05: Ms. Shelly Heim (B.A. 2025) took the job offer from Lonza. Congrats!
  • 2025/04: Ian Ferraro's work on the analysis of Metallofullerenes, in collaboration with the Zhang group, is published in Angew. Chemie.
  • 2025/01: The group is funded by NHAES to develop mass spectrometry methods for analyzing cyclic peptide environmental toxins.
  • 2024/12: Nick's paper on Ionization Characteristics of Glycan Homologues is now published in JASMS. Congrats!
  • 2024/01: The group is now funded by NH-Biomade to collaborate with the Biopharm industry on the ESI analysis of therapeutic proteins.
  • 2023/10: The group's patent on in-source preconcentration of environmental contaminants is granted.
  • 2023/04: Nick's paper on TeraOhm electrospray circuits is published in JASMS. Congrats!
  • 2023/03: Taoqing's paper on electrospray using chloroform for environmental contaminants is published in RCM. Congrats!
  • 2022/05: The group now receives grant from NSF to continue our research on low-current ESI regimes.
  • 2022/03: Our group will give 2 oral and 1 poster presentations at ASMS!
  • 2022/02: Huishan's paper on femto flow ESI is accepted by Analyst! Congrats!
  • 2021/09: Nick and Huishan will be presenting one Poster and one Talk in the upcoming ASMS conference! Congrats!
  • 2021/08: Nick and Huishan's paper on Femtoampere Ionization published on International Journal of Mass Spectrometry!
  • 2021/05: Mr. Alec Espinola accepted the job offer from Boston Analytical. Congratulations!
  • 2021/01: Dr. Mengtian Li's paper is now published on Chemical Science. Congratulations!
  • 2020/08: Ms. Nichole Heath accepted the job offer from the Johnson Matthey chemical company after her graduation.  Congratulations!
  • ​2019/08:  Mr. Alex Tognazzi, a group alumni, visits and shares his experiences in analytical industry to younger students.
  • 2019/08:  Dr. Huan Wang, from IBS Center for Soft and Living Matter of Korea, visits Li+ group and shares research experiences with students.  
  • 2019/07:  Prof. Anyin Li travels to the Chinese University of Hong Kong for collaborative research.
  • 2019/06:  Ms. Mengtian Li and Ms. Amina Gusic travels to Saratoga, NY to present research in the The 42nd Northeast Regional Meeting ofthe American Chemical Society (NERM 2019) conference.
  • 2018/08:  The Li+ group is collaborating with the Mass Spec R&D group of ThermoFisher Scientific on a CRC grant to develop analytical device and method for the rapid quantitative analysis of emerging contaminants. 
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