LC―MS determination of bioactive molecules based upon stable isotope-coded derivatization methodTOYO'OKA, Toshimasa.Journal of pharmaceutical and biomedical analysis. 2012, Vol 69, pp 174-184, issn 0731-7085, 11 p.Article

Determination Methods for Biologically Active Compounds by Ultra-Performance Liquid Chromatography Coupled with Mass Spectrometry : Application to the Analyses of Pharmaceuticals, Foods, Plants, Environments, Metabonomics, and MetabolomicsTOYO'OKA, Toshimasa.Journal of chromatographic science. 2008, Vol 46, Num 3, pp 233-247, issn 0021-9665, 15 p.Article

Determination of intracellular glutathione in rat hepatocytes after treatment of environmental pollutants by capillary electrophoresis with laser-induced fluorescence detectionTOYO'OKA, Toshimasa; TANABE, Junko; KASHIHARA, Yumi et al.Analytica chimica acta. 2001, Vol 433, Num 1, pp 1-12, issn 0003-2670Article

Miniaturization of analytical systems using immobilized biomolecules for high-throughput screeningKATO, Masaru; SAKA-KATO, Kumoko; TOYO'OKA, Toshimasa et al.Analytical and bioanalytical chemistry. 2006, Vol 384, Num 1, pp 50-52, 3 p.Article

Recent advances in separation and detection methods for thiol compounds in biological samplesTOYO'OKA, Toshimasa.Journal of chromatography. B. 2009, Vol 877, Num 28, pp 3318-3330, issn 1570-0232, 13 p.Article

On-line trypsin-encapsulated enzyme reactor by the sol-gel method integrated into capillary electrophoresisSAKAL-KATO, Kumiko; KATO, Masaru; TOYO'OKA, Toshimasa et al.Analytical chemistry (Washington, DC). 2002, Vol 74, Num 13, pp 2943-2949, issn 0003-2700Article

Simultaneous determination of α-lipoic acid and its reduced form by high-performance liquid chromatography with fluorescence detectionSATOH, Soichiro; TOYO'OKA, Toshimasa; FUKUSHIMA, Takeshi et al.Journal of chromatography. B. 2007, Vol 854, Num 1-2, pp 109-115, issn 1570-0232, 7 p.Article

Development of a new fluorescent probe for transition metal cations based upon fluorescence resonance energy transferMIURA, Masahiro; MIYAHARA, Taketune; KATO, Masaru et al.Analytica chimica acta. 2004, Vol 501, Num 1, pp 45-54, issn 0003-2670, 10 p.Article

Prediction for the Separation Efficiency of a Pair of Enantiomers during Chiral High-Performance Liquid Chromatography Using a Quartz Crystal MicrobalanceINAGAKI, Shinsuke; JUN ZHE MIN; TOYO'OKA, Toshimasa et al.Analytical chemistry (Washington, DC). 2008, Vol 80, Num 5, pp 1824-1828, issn 0003-2700, 5 p.Article

Reversible labeling of tyrosine residue in peptide using 4-fluoro-7-nitro-2,1,3-benzoxadiazole and N-acetyl-L-cysteineTOYO'OKA, Toshimasa; MANTANI, Tomomi; KATO, Masaru et al.Analytical sciences. 2003, Vol 19, Num 3, pp 341-346, issn 0910-6340, 6 p.Article

Simultaneous determination of morphine and its glucuronides in rat hair and rat plasma by reversed-phase liquid chromatography with electrospray ionization mass spectrometryTOYO'OKA, Toshimasa; YANO, Mayuko; KATO, Masaru et al.Analyst (London. 1877. Print). 2001, Vol 126, Num 8, pp 1339-1345, issn 0003-2654Article

Advances in determination of vitamin D related compounds in biological samples using liquid chromatography-mass spectrometry: A reviewHIGASHI, Tatsuya; SHIMADA, Kazutake; TOYO'OKA, Toshimasa et al.Journal of chromatography. B. 2010, Vol 878, Num 20, pp 1654-1661, issn 1570-0232, 8 p.Conference Paper

Silica sol-gel monolithic materials and their use in a variety of applicationsKATO, Masaru; SAKAI-KATO, Kumiko; TOYO'OKA, Toshimasa et al.Journal of separation science. 2005, Vol 28, Num 15, pp 1893-1908, issn 1615-9306, 16 p.Article

Creation of an on-chip enzyme reactor by encapsulating trypsin in sol-gel on a plastic microchipSAKAL-KATO, Kumiko; KATO, Masaru; TOYO'OKA, Toshimasa et al.Analytical chemistry (Washington, DC). 2003, Vol 75, Num 3, pp 388-393, issn 0003-2700, 6 p.Article

Syntheses and characterizations of 4-(3,17 β-dihydroxyestra-1,3,5(10)-trien-6α- and 6β-yl)amino-7-nitro-2,1,3-benzoxadiazoles as fluorescent probesOE, Tomoyuki; IKUTA, Miki; TOYO'OKA, Toshimasa et al.Analytical sciences. 2002, Vol 18, Num 2, pp 161-165, issn 0910-6340Article

Investigation of structure and enantioselectivity of BSA-encapsulated sol-gel columns prepared for capillary electrochromatographySAKAI-KATO, Kumiko; KATO, Masaru; NAKAKUKI, Haruna et al.Journal of pharmaceutical and biomedical analysis. 2003, Vol 31, Num 2, pp 299-309, issn 0731-7085, 11 p.Article

Quantitative evaluation of protein conformation in pharmaceuticals using cross-linking reactions coupled with LC―MS/MS analysisYAMAGUCHI, Hideto; HIRAKURA, Yutaka; SHIRAI, Hiroki et al.Journal of pharmaceutical and biomedical analysis. 2011, Vol 55, Num 3, pp 574-582, issn 0731-7085, 9 p.Article

Solid-state compatibility studies using a high-throughput and automated forced degradation systemWAKASAWA, Tatsuyoshi; SANO, Kyoko; HIRAKURA, Yutaka et al.International journal of pharmaceutics. 2008, Vol 355, Num 1-2, pp 164-173, issn 0378-5173, 10 p.Article

Ternary isocratic mobile phase optimization utilizing resolution Design Space based on retention time and peak width modelingKAWABE, Takefumi; TOMITSUKA, Toshiaki; KAJIRO, Toshi et al.Journal of chromatography. 2013, Vol 1273, pp 95-104, issn 0021-9673, 10 p.Article

Detection limit of measurement of pharmaceuticals labeled with short-lived isotopes in HPLC with flow-through γ-counterKITAJIMA, Akihito; MINAMIZAWA, Takao; TOYO'OKA, Toshimasa et al.Journal of pharmaceutical and biomedical analysis. 2008, Vol 46, Num 1, pp 177-180, issn 0731-7085, 4 p.Article

Synthesis and evaluation of new fluorescent derivatization reagents for resolution of chiral amines by RP-HPLCJUN ZHE MIN; TOYO'OKA, Toshimasa; FUKUSHIMA, Takeshi et al.Analytica chimica acta. 2004, Vol 515, Num 2, pp 243-253, issn 0003-2670, 11 p.Article

Development of a silica-based double-network hydrogel for high-throughput screening of encapsulated enzymesKATO, Masaru; SHODA, Naomi; YAMAMOTO, Tatsuhiro et al.Analyst (London. 1877. Print). 2009, Vol 134, Num 3, pp 577-581, issn 0003-2654, 5 p.Article

Rapid, sensitive and simultaneous determination of fluorescence-labeled polyamines in human hair by high-pressure liquid chromatography coupled with electrospray-ionization time-of-flight mass spectrometrySUGIURA, Koichi; JUN ZHE MIN; TOYO'OKA, Toshimasa et al.Journal of chromatography. 2008, Vol 1205, Num 1-2, pp 94-102, issn 0021-9673, 9 p.Article

Metabolic profiling of rat hair and screening biomarkers using ultra performance liquid chromatography with electrospray ionization time-of-flight mass spectrometryINAGAKI, Shinsuke; NODA, Takumi; JUN ZHE MIN et al.Journal of chromatography. 2007, Vol 1176, Num 1-2, pp 94-99, issn 0021-9673, 6 p.Article

Monolithic bioreactor immobilizing trypsin for high-throughput analysisKATO, Masaru; INUZUKA, Kenji; SAKAI-KATO, Kumiko et al.Analytical chemistry (Washington, DC). 2005, Vol 77, Num 6, pp 1813-1818, issn 0003-2700, 6 p.Article