Kei Zaitsu
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Previous Organizations / Institutes
The organizations / institutes from the scholar's other articles in the past ten years
Research Subjects
Kei Zaitsu has a total of 26 co-authors. Here are the top co-authors by number of shared publications:
Hitoshi Tsuchihashi
Division of Preventive and Social Medicine, Department of Legal Medicine, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki, Osaka 569-8686, Japan
10 shared publicationsMunehiro Katagi
Forensic Science Laboratory, Osaka Prefectural Police Headquarters, 1-3-18, Hommachi, Chuo-ku, Osaka 541-0053, Japan
10 shared publicationsHiroe Kamata
Forensic Science Laboratory, Osaka Prefectural Police Headquarters, 1-3-18, Hommachi, Chuo-ku, Osaka 541-0053, Japan
6 shared publicationsAkihiro Miki
Osaka Prefectural Police HQ
4 shared publications- Akihiro Miki
†Forensic Science Laboratory, Osaka Prefectural Police Headquarters, 1-3-18 Hommachi, Chuo-ku, Osaka 541-0053, Japan
4 shared publications Hiroshi Nishioka
Forensic Science Laboratory, Osaka Prefectural Police Headquarters, 1-3-18, Hommachi, Chuo-ku, Osaka 541-0053, Japan
4 shared publications
Latest Publications
- 1 April 2015
- Published by Elsevier in Forensic Science International
- Vol. 249, 181-188
Metabolism of the designer drug α-pyrrolidinobutiophenone (α-PBP) in humans: Identification and quantification of the phase I metabolites in urine
- 1 April 2015
- Published by Elsevier in Forensic Science International
- Vol. 249, 181-188
Metabolism of the designer drug α-pyrrolidinobutiophenone (α-PBP) in humans: Identification and quantification of the phase I metabolites in urine
- Open Access
- 1 January 2012
- Published by Japanese Association of Forensic Science and Technology in Japanese Journal of Forensic Science and Technology
- Vol. 17 (2)
Erratum：Comprehensive Analytical Methods of the Synthetic Cannabinoids Appearing In the Illicit Drug Market
- 1 January 2012
- Published by Japanese Association of Forensic Science and Technology in Japanese Journal of Forensic Science and Technology
- Vol. 17 (2)
Open AccessErratum：Comprehensive Analytical Methods of the Synthetic Cannabinoids Appearing In the Illicit Drug Market
- 22 April 2011
- Published by Springer Nature in Forensic Toxicology
- Vol. 29 (2) , 73-84
Recently abused β-keto derivatives of 3,4-methylenedioxyphenylalkylamines: a review of their metabolisms and toxicological analysis
- 22 April 2011
- Published by Springer Nature in Forensic Toxicology
- Vol. 29 (2) , 73-84
Recently abused β-keto derivatives of 3,4-methylenedioxyphenylalkylamines: a review of their metabolisms and toxicological analysis
- 1 January 2011
- Published by Japanese Association of Forensic Science and Technology in Japanese Journal of Forensic Science and Technology
- Vol. 16 (1) , 13-27
Establishment of a Drug Screening System by LC/MSn—Applications of a Liquid Chromatography/Mass Spectrometry System based on Retention Indices—
- 1 January 2011
- Published by Japanese Association of Forensic Science and Technology in Japanese Journal of Forensic Science and Technology
- Vol. 16 (1) , 13-27
Establishment of a Drug Screening System by LC/MSn—Applications of a Liquid Chromatography/Mass Spectrometry System based on Retention Indices—
- 16 December 2009
- Published by Springer Nature in Forensic Toxicology
- Vol. 28 (1) , 9-18
Simultaneous analysis of six novel hallucinogenic (tetrahydrobenzodifuranyl)aminoalkanes (FLYs) and (benzodifuranyl)aminoalkanes (DragonFLYs) by GC-MS, LC-MS, and LC-MS-MS
- 16 December 2009
- Published by Springer Nature in Forensic Toxicology
- Vol. 28 (1) , 9-18
Simultaneous analysis of six novel hallucinogenic (tetrahydrobenzodifuranyl)aminoalkanes (FLYs) and (benzodifuranyl)aminoalkanes (DragonFLYs) by GC-MS, LC-MS, and LC-MS-MS
- 1 July 2009
- Published by Elsevier in Forensic Science International
- Vol. 188 (1-3) , 131-139
Determination of the metabolites of the new designer drugs bk-MBDB and bk-MDEA in human urine
- 1 July 2009
- Published by Elsevier in Forensic Science International
- Vol. 188 (1-3) , 131-139
Determination of the metabolites of the new designer drugs bk-MBDB and bk-MDEA in human urine
- 26 September 2008
- Published by Springer Nature in Forensic Toxicology
- Vol. 26 (2) , 45-51
Discrimination and identification of regioisomeric β-keto analogues of 3,4-methylenedioxyamphetamines by gas chromatography-mass spectrometry
- 26 September 2008
- Published by Springer Nature in Forensic Toxicology
- Vol. 26 (2) , 45-51
Discrimination and identification of regioisomeric β-keto analogues of 3,4-methylenedioxyamphetamines by gas chromatography-mass spectrometry
- 1 May 2008
- Published by Elsevier in Forensic Science International
- Vol. 177 (1) , 77-84
Determination of a newly encountered designer drug “p-methoxyethylamphetamine” and its metabolites in human urine and blood
- 1 May 2008
- Published by Elsevier in Forensic Science International
- Vol. 177 (1) , 77-84
Determination of a newly encountered designer drug “p-methoxyethylamphetamine” and its metabolites in human urine and blood
- 1 January 2008
- Published by Elsevier in Forensic Science International
- Vol. 174 (2-3) , 189-196
Long-term stability of various drugs and metabolites in urine, and preventive measures against their decomposition with special attention to filtration sterilization
- 1 January 2008
- Published by Elsevier in Forensic Science International
- Vol. 174 (2-3) , 189-196
Long-term stability of various drugs and metabolites in urine, and preventive measures against their decomposition with special attention to filtration sterilization
- 26 November 2007
- Published by Wiley in Journal of Mass Spectrometry
- Vol. 43 (4) , 528-534
Discrimination and identification of the six aromatic positional isomers of trimethoxyamphetamine (TMA) by gas chromatography‐mass spectrometry (GC‐MS)
A reliable and accurate GC‐MS method was developed that allows both mass spectrometric and chromatographic discrimination of the six aromatic positional isomers of trimethoxyamphetamine (TMA). Regardless of the trifluoroacetyl (TFA) derivatization, chromatographic separation of all the investigated isomers was achieved by using DB‐5ms capillary columns (30 m × 0.32 mm i.d.), with run times less than 15 min. However, the mass spectra of the nonderivatized TMAs, except 2,4,6‐trimethoxyamphetmine (TMA‐6), showed insufficient difference for unambiguous discrimination. On the other hand, the mass spectra of the TFA derivatives of the six isomers exhibited fragments with significant intensity differences, which allowed the unequivocal identification of all the aromatic positional isomers investigated in the present study. This GC‐MS technique in combination with TFA derivatization, therefore, is a powerful method to discriminate these isomers, especially useful to distinguish the currently controlled 3,4,5‐trimethoxyamphetmine (TMA‐1) and 2,4,5‐trimethoxyamphetmine (TMA‐2) from other uncontrolled TMAs. Copyright © 2007 John Wiley & Sons, Ltd.
- 26 November 2007
- Published by Wiley in Journal of Mass Spectrometry
- Vol. 43 (4) , 528-534
Discrimination and identification of the six aromatic positional isomers of trimethoxyamphetamine (TMA) by gas chromatography‐mass spectrometry (GC‐MS)
A reliable and accurate GC‐MS method was developed that allows both mass spectrometric and chromatographic discrimination of the six aromatic positional isomers of trimethoxyamphetamine (TMA). Regardless of the trifluoroacetyl (TFA) derivatization, chromatographic separation of all the investigated isomers was achieved by using DB‐5ms capillary columns (30 m × 0.32 mm i.d.), with run times less than 15 min. However, the mass spectra of the nonderivatized TMAs, except 2,4,6‐trimethoxyamphetmine (TMA‐6), showed insufficient difference for unambiguous discrimination. On the other hand, the mass spectra of the TFA derivatives of the six isomers exhibited fragments with significant intensity differences, which allowed the unequivocal identification of all the aromatic positional isomers investigated in the present study. This GC‐MS technique in combination with TFA derivatization, therefore, is a powerful method to discriminate these isomers, especially useful to distinguish the currently controlled 3,4,5‐trimethoxyamphetmine (TMA‐1) and 2,4,5‐trimethoxyamphetmine (TMA‐2) from other uncontrolled TMAs. Copyright © 2007 John Wiley & Sons, Ltd.