Forensic analysis of eleven cyclic antidepressants in human biological samples using a new reversed-phase chromatographic column of 2 μm porous microspherical silica gel

1997 ◽  
Vol 692 (2) ◽  
pp. 405-412 ◽  
Author(s):  
Einosuke Tanaka ◽  
Masaru Terada ◽  
Takako Nakamura ◽  
Shogo Misawa ◽  
Choei Wakasugi
Keyword(s):  
Silica Gel ◽  
Biological Samples ◽  
Forensic Analysis ◽  
Reversed Phase ◽  
Chromatographic Column

Characterization of a new reversed-phase chromatographic column on a 2-μm porous microspherical silica gel

1995 ◽  
Vol 691 (1-2) ◽  
pp. 81-89 ◽  
Author(s):  
Hiroyuki Moriyama ◽  
Masakazu Anegayama ◽  
Katsuo Komiya ◽  
Yoshio Kato
Keyword(s):  
Silica Gel ◽  
Reversed Phase ◽  
Chromatographic Column

A Fast and Sensitive Method Combining Reversed-Phase Chromatography with High Resolution Mass Spectrometry to Quantify 2-Fluoro-2-Deoxyglucose and Its Phosphorylated Metabolite for Determining Glucose Uptake

2019 ◽  
Author(s):  
Ashley Williams ◽  
Deborah Muoio ◽  
Guofang Zhang
Keyword(s):  
Glucose Uptake ◽  
Biological Samples ◽  
High Resolution Mass Spectrometry ◽  
Reversed Phase ◽  
Sodium Adduct ◽  
Negative Mode ◽  
Glucose Analogues ◽  
Positive Mode ◽  
Q Exactive ◽  
Glucose Analogue

Quantative measurements of the glucose analogue, 2-deoxyglucose (2DG), and its phosphorylated metabolite (2-deoxyglucose-6-phosphate (2DG-6-P)) are critical for the measurement of glucose uptake. While the field has long identified the need for sensitive and reliable assays that deploy non-radiolabled glucose analogues to assess glucose uptake, no analytical MS-based methods exist to detect trace amounts in complex biological samples. In the present work, we show that 2DG is poorly suited for MS-based methods due to interfering metabolites. We therefore developed and validated an alternative C18-based LC-Q-Exactive-Orbitrap-MS method using 2-fluoro-2-deoxyglucose (2FDG) to quantify both 2FDG and 2FDG-6-P by measuring the sodium adduct of 2FDG in the positive mode and deprotonation of 2FDG-6-P in the negative mode. The low detection limit of this method can reach 81.4 and 48.8 fmol for both 2FDG and 2FDG-6-P, respectively. The newly developed method was fully validated via calibration curves in the presence and absence of biological matrix. The present work is the first successful LC-MS method that can quantify trace amounts of a nonradiolabeled glucose analogue and its phosphorylated metabolite and is a promising analytical method to determine glucose uptake in biological samples.

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