| Greening analytical chromatography CJ Welch, N Wu, M Biba, R Hartman, T Brkovic, X Gong, R Helmy, ... TrAC Trends in Analytical Chemistry 29 (7), 667-680, 2010 | 361 | 2010 |
| Preparation and Solid-State Characterization of Nonstoichiometric Cocrystals of a Phosphodiesterase-IV Inhibitor and l-Tartaric Acid N Variankaval, R Wenslow, J Murry, R Hartman, R Helmy, E Kwong, ... Crystal growth & design 6 (3), 690-700, 2006 | 130 | 2006 |
| A multi-element ICP-MS survey method as an alternative to the heavy metals limit test for pharmaceutical materials T Wang, J Wu, R Hartman, X Jia, RS Egan Journal of pharmaceutical and biomedical analysis 23 (5), 867-890, 2000 | 118 | 2000 |
| Analytical Method Volume Intensity (AMVI): A green chemistry metric for HPLC methodology in the pharmaceutical industry R Hartman, R Helmy, M Al-Sayah, CJ Welch Green chemistry 13 (4), 934-939, 2011 | 88 | 2011 |
| Macrocyclic glycopeptide chiral selectors bonded to core-shell particles enables enantiopurity analysis of the entire verubecestat synthetic route CL Barhate, DA Lopez, AA Makarov, X Bu, WJ Morris, A Lekhal, ... Journal of Chromatography A 1539, 87-92, 2018 | 53 | 2018 |
| Multi-column ultra-high performance liquid chromatography screening with chaotropic agents and computer-assisted separation modeling enables process development of new drug … IAH Ahmad, W Chen, HM Halsey, A Klapars, J Limanto, GF Pirrone, ... Analyst 144 (9), 2872-2880, 2019 | 35 | 2019 |
| Supercritical fluid chromatography-photodiode array detection-electrospray ionization mass spectrometry as a framework for impurity fate mapping in the development and … GF Pirrone, RM Mathew, AA Makarov, F Bernardoni, A Klapars, ... Journal of Chromatography B 1080, 42-49, 2018 | 33 | 2018 |
| Efficient HPLC method development using structure-based database search, physico-chemical prediction and chromatographic simulation L Wang, J Zheng, X Gong, R Hartman, V Antonucci Journal of Pharmaceutical and Biomedical Analysis 104, 49-54, 2015 | 30 | 2015 |
| Revealing the inner workings of the power function algorithm in Charged Aerosol Detection: A simple and effective approach to optimizing power function value for quantitative … IAH Ahmad, A Blasko, J Tam, N Variankaval, HM Halsey, R Hartman, ... Journal of Chromatography A 1603, 1-7, 2019 | 29 | 2019 |
| Generic gas chromatography flame ionization detection method using hydrogen as the carrier gas for the analysis of solvents in pharmaceuticals F Bernardoni, HM Halsey, R Hartman, T Nowak, EL Regalado Journal of pharmaceutical and biomedical analysis 165, 366-373, 2019 | 28 | 2019 |
| Development and validation of an HPLC method for the impurity and quantitative analysis of etoricoxib R Hartman, A Abrahim, A Clausen, B Mao, LS Crocker, Z Ge Journal of liquid chromatography & related technologies 26 (15), 2551-2566, 2003 | 28 | 2003 |
| Generic gas chromatography-flame ionization detection method for quantitation of volatile amines in pharmaceutical drugs and synthetic intermediates GC Graffius, BM Jocher, D Zewge, HM Halsey, G Lee, F Bernardoni, X Bu, ... Journal of Chromatography A 1518, 70-77, 2017 | 23 | 2017 |
| Examination of rofecoxib solution decomposition under alkaline and photolytic stress conditions B Mao, A Abrahim, Z Ge, DK Ellison, R Hartman, SV Prabhu, RA Reamer, ... Journal of pharmaceutical and biomedical analysis 28 (6), 1101-1113, 2002 | 23 | 2002 |
| Simple spectrophotometry method for the determination of sulfur dioxide in an alcohol-thionyl chloride reaction J Zheng, F Tan, R Hartman Analytica Chimica Acta 891, 255-260, 2015 | 18 | 2015 |
| An etoricoxib phase diagram: Hemihydrate and anhydrate LS Crocker, Z Ge, A Abrahim, R Hartman, J Xu Organic process research & development 7 (6), 958-961, 2003 | 8 | 2003 |
| Development of a derivatization method, coupled with reverse phase HPLC, for monitoring the formation of an enolate intermediate A Abrahim, R Hartman, Z Ge, B Mao, J Marcoux Journal of liquid chromatography & related technologies 25 (7), 1049-1062, 2002 | 7 | 2002 |
| Development of a quality risk based tool for the selection of regulatory starting materials for commercial drug substance manufacturing processes J Lepore, T Mahmood, R Hartman Organic Process Research & Development 24 (11), 2762-2771, 2020 | 6 | 2020 |
| Generic reversed‐phase ultra‐high‐pressure liquid chromatography methodology developed by using computer‐assisted modeling for streamlined performance evaluation of a wide … IAH Ahmad, GL Losacco, M Figus, D Korani, MJ Gunsch, HR Lhotka, ... Separation Science Plus 5 (5), 138-145, 2022 | 3 | 2022 |
| ISOCRATIC LIQUID-CHROMATOGRAPHIC SYSTEM FOR THE ANALYSIS OF CARDIOACTIVE DRUGS LE Ebnet, RP Tracy, S Campion, R Hartman, TP Moyer CLINICAL CHEMISTRY 26 (7), 1003-1003, 1980 | 2 | 1980 |
| Effect of Sample Diluents on the Quantitation of Basic Compounds by High Performance Liquid Chromaography J Zheng, L Wang, V Antonucci, R Hartman, P Diamandopoulos, X Gong Chromatographia 81, 1631-1639, 2018 | 1 | 2018 |
Erik L. RegaladoAnalytical Research and Development, Merck Research Laboratories, Merck & Co., Inc.Verified email at merck.com
