| Low-temperature plasma probe for ambient desorption ionization JD Harper, NA Charipar, CC Mulligan, X Zhang, RG Cooks, Z Ouyang Analytical chemistry 80 (23), 9097-9104, 2008 | 851 | 2008 |
| Design and characterization of a multisource hand-held tandem mass spectrometer L Gao, A Sugiarto, JD Harper, RG Cooks, Z Ouyang Analytical chemistry 80 (19), 7198-7205, 2008 | 261 | 2008 |
| Detection of explosives and related compounds by low-temperature plasma ambient ionization mass spectrometry JF Garcia-Reyes, JD Harper, GA Salazar, NA Charipar, Z Ouyang, ... Analytical chemistry 83 (3), 1084-1092, 2011 | 193 | 2011 |
| Analysis of drugs of abuse in biofluids by low temperature plasma (LTP) ionization mass spectrometry AU Jackson, JF Garcia-Reyes, JD Harper, JS Wiley, A Molina-Díaz, ... Analyst 135 (5), 927-933, 2010 | 147 | 2010 |
| Screening of agrochemicals in foodstuffs using low-temperature plasma (LTP) ambient ionization mass spectrometry JS Wiley, JF García-Reyes, JD Harper, NA Charipar, Z Ouyang, ... Analyst 135 (5), 971-979, 2010 | 133 | 2010 |
| Gas‐flow assisted ion transfer for mass spectrometry S Garimella, W Xu, G Huang, JD Harper, RG Cooks, Z Ouyang Journal of Mass Spectrometry 47 (2), 201-207, 2012 | 106 | 2012 |
| Direct olive oil analysis by low‐temperature plasma (LTP) ambient ionization mass spectrometry JF García‐Reyes, F Mazzoti, JD Harper, NA Charipar, S Oradu, Z Ouyang, ... Rapid Communications in Mass Spectrometry: An International Journal Devoted …, 2009 | 104 | 2009 |
| Direct detection of benzene, toluene, and ethylbenzene at trace levels in ambient air by atmospheric pressure chemical ionization using a handheld mass spectrometer G Huang, L Gao, J Duncan, JD Harper, NL Sanders, Z Ouyang, RG Cooks Journal of the American Society for Mass Spectrometry 21, 132-135, 2010 | 103 | 2010 |
| Low temperature plasma probe and methods of use thereof N Charipar, J Harper, Z Ouyang, RG Cooks US Patent 8,519,354, 2013 | 99* | 2013 |
| Systems and methods for transfer of ions for analysis Z Ouyang, RG Cooks, SV Garimella, JD Harper, NA Charipar US Patent 8,410,431, 2013 | 93 | 2013 |
| Characterizing the gas phase ion chemistry of an ion trap mobility spectrometry based explosive trace detector using a tandem mass spectrometer J Kozole, J Tomlinson-Phillips, JR Stairs, JD Harper, SR Lukow, ... Talanta 99, 799-810, 2012 | 59 | 2012 |
| Systems and methods for transfer of ions for analysis Z Ouyang, RG Cooks, SV Garimella, JD Harper, NA Charipar US Patent 8,803,085, 2014 | 58 | 2014 |
| High-resolution infrared rovibrational studies of the A1 species fundamentals of isotopic ketenes JL Duncan, AM Ferguson, J Harper, KH Tonge, F Hegelund Journal of Molecular Spectroscopy 122 (1), 72-93, 1987 | 49 | 1987 |
| Interfacing an ion mobility spectrometry based explosive trace detector to a triple quadrupole mass spectrometer J Kozole, JR Stairs, I Cho, JD Harper, SR Lukow, RT Lareau, R DeBono, ... Analytical chemistry 83 (22), 8596-8603, 2011 | 47 | 2011 |
| Systems and methods for transfer of ions for analysis Z Ouyang, RG Cooks, SV Garimella, JD Harper, NA Charipar US Patent 8,592,756, 2013 | 41 | 2013 |
| Systems and methods for transfer of ions for analysis Z Ouyang, RG Cooks, SV Garimella, JD Harper, NA Charipar US Patent 8,686,351, 2014 | 40 | 2014 |
| Plug-in electric vehicle (PEV) smart charging module J Harper, DS Dobrzynski US Patent 9,758,046, 2017 | 32 | 2017 |
| Systems and methods for transfer of ions for analysis Z Ouyang, RG Cooks, SV Garimella, JD Harper, NA Charipar US Patent 8,963,079, 2015 | 31 | 2015 |
| Systems and methods for transfer of ions for analysis Z Ouyang, RG Cooks, SV Garimella, JD Harper, NA Charipar US Patent 9,484,195, 2016 | 28 | 2016 |
| Systems and methods for transfer of ions for analysis Z Ouyang, RG Cooks, SV Garimella, JD Harper, NA Charipar US Patent 9,159,540, 2015 | 28 | 2015 |