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Xin Y, Foster SW, Makey DM, Parker D, Bradow J, Wang X, Berritt S, Mongillo R, Grinias JP, Kennedy RT. High-Throughput Capillary Liquid Chromatography Using a Droplet Injection and Application to Reaction Screening. Anal Chem 2024; 96:4693-4701. [PMID: 38442211 PMCID: PMC11001260 DOI: 10.1021/acs.analchem.4c00150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2024]
Abstract
The cycle time of a standard liquid chromatography (LC) system is the sum of the time for the chromatographic run and the autosampler injection sequence. Although LC separation times in the 1-10 s range have been demonstrated, injection sequences are commonly >15 s, limiting throughput possible with LC separations. Further, such separations are performed on relatively large bore columns requiring flow rates of ≥5 mL/min, thus generating large volumes of mobile phase waste when used for large scale screening and increasing the difficulty in interfacing to mass spectrometry. Here, a droplet injector system was established that replaces the autosampler with a four-port, two-position valve equipped with a 20 nL internal loop interfaced to a syringe pump and a three-axis positioner to withdraw sample droplets from a well plate. In the system, sample and immiscible fluid are pulled alternately from a well plate into a capillary and then through the injection valve. The valve is actuated when sample fills the loop to allow sequential injection of samples at high throughput. Capillary LC columns with 300 μm inner diameter were used to reduce the consumption of mobile phase and sample. The system achieved 96 separations of 20 nL droplet samples containing 3 components in as little as 8.1 min with 5-s cycle time. This system was coupled to a mass spectrometer through an electrospray ionization source for high-throughput chemical reaction screening.
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Affiliation(s)
- Yue Xin
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Samuel W Foster
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, New Jersey 08028, United States
| | - Devin M Makey
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Deklin Parker
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, New Jersey 08028, United States
| | - James Bradow
- Pfizer Global Research and Development, Eastern Point Road, Groton, Connecticut 06415, United States
| | - Xiaochun Wang
- Pfizer Global Research and Development, Eastern Point Road, Groton, Connecticut 06415, United States
| | - Simon Berritt
- Pfizer Global Research and Development, Eastern Point Road, Groton, Connecticut 06415, United States
| | - Robert Mongillo
- Pfizer Global Research and Development, Eastern Point Road, Groton, Connecticut 06415, United States
| | - James P Grinias
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, New Jersey 08028, United States
| | - Robert T Kennedy
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
- Department of Pharmacology, University of Michigan, Ann Arbor, Michigan 48109, United States
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Makey DM, Diehl RC, Xin Y, Murray BE, Stoll DR, Ruotolo BT, Grinias JP, Narayan ARH, Lopez-Carillo V, Stark M, Johnen P, Kennedy RT. High-Throughput Liquid Chromatographic Analysis Using a Segmented Flow Injector with a 1 s Cycle Time. Anal Chem 2023; 95:17028-17036. [PMID: 37943345 PMCID: PMC11027085 DOI: 10.1021/acs.analchem.3c03719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
High-throughput screening (HTS) workflows are revolutionizing many fields, including drug discovery, reaction discovery and optimization, diagnostics, sensing, and enzyme engineering. Liquid chromatography (LC) is commonly deployed during HTS to reduce matrix effects, distinguish isomers, and preconcentrate prior to detection, but LC separation time often limits throughput. Although subsecond LC separations have been demonstrated, they are rarely utilized during HTS due to limitations associated with the speed of common autosamplers. In this work, these limits are overcome by utilizing droplet microfluidics for sample introduction. In the method, a train of samples segmented by air are continuously pumped into the inlet of an LC injection valve that is actuated once each sample fills the sample loop. Coupled with 2.1 mm diameter × 5 mm long columns packed with 2.7 μm superficially porous C18 particles operated at 5 mL/min, the injector enabled separation of 3 components at 1 s/sample and analysis of a 96-well plate in 1.6 min with <2% peak area relative standard deviation. Analyte-dependent carryover was minimized by including wash droplets composed of organic solvent in between sample droplets. High-throughput LC coupled with mass spectrometric detection using the segmented flow injector was applied to a screen of inhibitors of a cytochrome P450-catalyzed hydroxylation reaction. Measurements of the reaction substrate and product concentrations made using fast LC with the segmented flow injector correlated well with measurements made using a more conventional, 3 min LC method. These results demonstrate the potential for droplet microfluidics to be used for sample introduction during high-throughput LC analysis.
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Affiliation(s)
- Devin M Makey
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Roger C Diehl
- Life Sciences Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Yue Xin
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Bridget E Murray
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Dwight R Stoll
- Department of Chemistry, Gustavus Adolphus College, Saint Peter, Minnesota 56082, United States
| | - Brandon T Ruotolo
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - James P Grinias
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, New Jersey 08028, United States
| | - Alison R H Narayan
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
- Life Sciences Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
- Program in Chemical Biology, University of Michigan, Ann Arbor, Michigan 48109, United States
| | | | | | | | - Robert T Kennedy
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
- Department of Pharmacology, University of Michigan, Ann Arbor, Michigan 48109, United States
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Ma J, Li K, Shi S, Li J, Tang S, Liu L. The Application of UHPLC-HRMS for Quality Control of Traditional Chinese Medicine. Front Pharmacol 2022; 13:922488. [PMID: 35721122 PMCID: PMC9201421 DOI: 10.3389/fphar.2022.922488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 05/10/2022] [Indexed: 11/13/2022] Open
Abstract
UHPLC-HRMS (ultra-high-performance liquid chromatography-high resolution mass spectrometry) is a new technique that unifies the application of UHPLC with HRMS. Because of the high sensitivity and good separation ability of UHPLC and the sensitivity of HRMS, this technique has been widely used for structure identification, quantitative determination, fingerprint analysis, and elucidation of the mechanisms of action of traditional Chinese medicines (TCMs) in recent years. This review mainly outlines the advantages of using UHPLC-HRMS and provides a survey of the research advances on UHPLC-HRMS for the quality control of TCMs.
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Affiliation(s)
- Jieyao Ma
- School of Pharmaceutical Sciences, Hunan Province Key Laboratory for Antibody-Based Drug and Intelligent Delivery System, Hunan University of Medicine, Huaihua, China.,Hunan Provincial Key Laboratory of Dong Medicine, Hunan University of Medicine, Huaihua, China
| | - Kailin Li
- School of Pharmaceutical Sciences, Hunan Province Key Laboratory for Antibody-Based Drug and Intelligent Delivery System, Hunan University of Medicine, Huaihua, China
| | - Silin Shi
- School of Pharmaceutical Sciences, Hunan Province Key Laboratory for Antibody-Based Drug and Intelligent Delivery System, Hunan University of Medicine, Huaihua, China
| | - Jian Li
- School of Pharmaceutical Sciences, Hunan Province Key Laboratory for Antibody-Based Drug and Intelligent Delivery System, Hunan University of Medicine, Huaihua, China
| | - Sunv Tang
- School of Pharmaceutical Sciences, Hunan Province Key Laboratory for Antibody-Based Drug and Intelligent Delivery System, Hunan University of Medicine, Huaihua, China
| | - LiangHong Liu
- School of Pharmaceutical Sciences, Hunan Province Key Laboratory for Antibody-Based Drug and Intelligent Delivery System, Hunan University of Medicine, Huaihua, China.,Hunan Provincial Key Laboratory of Dong Medicine, Hunan University of Medicine, Huaihua, China
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Kurre S, Foster S, Morrow K, Zimmer A, Ray M, Notarfrancesco L, Patel K, Grinias JP. Exploring the Implementation of Compact Chromatographic Instrumentation in Common Analytical Workflows. LCGC NORTH AMERICA 2022. [DOI: 10.56530/lcgc.na.bi9066i9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
In many industries, the concepts of “smaller,” “faster,” “easier to use,” and “cheaper” are key drivers when developing new technologies. The world of chemical separations is no different. Today, compact chromatographic instrumentation is being implemented in many workflows, as illustrated here through various examples.
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