Výsledky vyhledávání - "Randolph V. Norheim"

A Miniature Multilevel Structures for Lossless Ion Manipulations Ion Mobility Spectrometer with Wide Mobility Range Separation Capabilities

Autor: Adam L. Hollerbach, Randolph V. Norheim, Pearl Kwantwi-Barima, Richard D. Smith, Yehia M. Ibrahim

Publikováno v: Anal Chem

Ion mobility spectrometry employing structures for lossless ion manipulations (SLIM-IMS) is an attractive gas-phase separation technique due to its ability to achieve unprecedented effective ion path lengths (>1 km) and IMS resolving powers in a smal

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8cb88d3f437a5e5394b92271c8fcd44a
https://europepmc.org/articles/PMC9048586/

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Traveling-Wave-Based Electrodynamic Switch for Concurrent Dual-Polarity Ion Manipulations in Structures for Lossless Ion Manipulations

Autor: Isaac K. Attah, Sandilya V. B. Garimella, Yehia M. Ibrahim, Randolph V. Norheim, Gabe Nagy, Richard D. Smith, Gordon A. Anderson

Publikováno v: Anal Chem

We describe the development of a dual-polarity traveling-wave (TW) structures for lossless ion manipulations (SLIM) ion mobility spectrometry (IMS) device capable of switching both positive and negative ions that are traveling simultaneously along th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e076c83866f7d9616480bc2f46c3841b
https://doi.org/10.1021/acs.analchem.9b03987

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Ion Mobility Spectrometry with High Ion Utilization Efficiency Using Traveling Wave-Based Structures for Lossless Ion Manipulations

Autor: Joon-Yong Lee, Isaac K. Attah, Venkateshkumar Prabhakaran, Cameron M. Giberson, Sandilya V. B. Garimella, Christopher D. Chouinard, Aneesh Prabhakaran, Randolph V. Norheim, Ailin Li, Richard D. Smith, Christopher R. Conant, Adam L. Hollerbach, Gabe Nagy, Yehia M. Ibrahim

Publikováno v: Anal Chem

Ion packets introduced from gates, ion funnel traps, and other conventional ion injection mechanisms produce ion pulse widths typically around a few microseconds or less for ion mobility spectrometry (IMS)-based separations on the order of 100 millis

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b8abe87372f1a6ac9b3de838e8248377
https://pubmed.ncbi.nlm.nih.gov/33105077

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SLIM Ultrahigh Resolution Ion Mobility Spectrometry Separations of Isotopologues and Isotopomers Reveal Mobility Shifts due to Mass Distribution Changes

Autor: Roza Wojcik, Adam L. Hollerbach, Sandilya V. B. Garimella, Randolph V. Norheim, Matthew E. Monroe, Isaac K. Attah, Marshall R. Ligare, Yehia M. Ibrahim, Gabe Nagy, Ian K. Webb, Richard D. Smith, Thomas O. Metz, Karl K. Weitz, Felicity F. Nielson, Ryan S. Renslow

Publikováno v: Analytical chemistry. 91(18)

We report on separations of ion isotopologues and isotopomers using ultrahigh-resolution traveling wavebased Structures for Lossless Ion Manipulations with serpentine ultralong path and extended routing ion mobility spectrometry coupled to mass spect

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fd6ef8fe078ef9f57864e3f97abeb322
https://pubmed.ncbi.nlm.nih.gov/31450886

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Development of an Ion Mobility Spectrometry-Orbitrap Mass Spectrometer Platform

Autor: Richard D. Smith, Roza Wojcik, Randolph V. Norheim, Spencer A. Prost, Sandilya V. B. Garimella, Erin S. Baker, Ivan Rusyn, Yehia M. Ibrahim

Publikováno v: Analytical Chemistry. 88:12152-12160

Complex samples benefit from multidimensional measurements where higher resolution enables more complete characterization of biological and environmental systems. To address this challenge, we developed a drift tube-based ion mobility spectrometry-Or

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5136fb9e20ffc4d9ac8ada92752b2778
https://doi.org/10.1021/acs.analchem.6b03027

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Squeezing of Ion Populations and Peaks in Traveling Wave Ion Mobility Separations and Structures for Lossless Ion Manipulations Using Compression Ratio Ion Mobility Programming

Autor: Richard D. Smith, Erin S. Baker, Yehia M. Ibrahim, Ian K. Webb, Sandilya V. B. Garimella, Spencer A. Prost, Gordon A. Anderson, Ahmed M. Hamid, Randolph V. Norheim, Liulin Deng

Publikováno v: Analytical Chemistry. 88:11877-11885

In this work we report an approach for spatial and temporal gas-phase ion population manipulation, wherein we collapse ion distributions in ion mobility (IM) separations into tighter packets providing higher sensitivity measurements in conjunction wi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a397e478acf44519aeffa1cd8dd83e1c
https://doi.org/10.1021/acs.analchem.6b03660

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Achieving High Resolution Ion Mobility Separations Using Traveling Waves in Compact Multiturn Structures for Lossless Ion Manipulations

Autor: Liulin Deng, Richard D. Smith, Sandilya V. B. Garimella, Ahmed M. Hamid, Gordon A. Anderson, Randolph V. Norheim, Aleksey V. Tolmachev, Ian K. Webb, Xueyun Zheng, Yehia M. Ibrahim, Erin S. Baker, Spencer A. Prost

Publikováno v: Analytical Chemistry. 88:8949-8956

We report on ion mobility (IM) separations achievable using traveling waves (TW) in a Structures for Lossless Ion Manipulations (SLIM) module having a 44 cm path length and 16 90° turns. The performance of the TW-SLIM module was evaluated for ion tr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b9eb2801fa4786f388e9b12dbd68160d
https://doi.org/10.1021/acs.analchem.6b01914

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