Hajime Miyaguchi

A method for screening for various sedative-hypnotics in serum by liquid chromatography/single quadrupole mass spectrometry.

Urinary excretion profiles of two major triazolam metabolites, alpha-hydroxytriazolam and 4-hydroxytriazolam.

Identification of impurities and the statistical classification of methamphetamine using headspace solid phase microextraction and gas chromatography-mass spectrometry.

Analysis of hallucinogenic constituents in Amanita mushrooms circulated in Japan.

Forensic application of chiral separation of amphetamine-type stimulants to impurity analysis of seized methamphetamine by capillary electrophoresis.

Microchip-based liquid-liquid extraction for gas-chromatography analysis of amphetamine-type stimulants in urine.

Contribution of thermal desorption and liquid-liquid extraction for identification and profiling of impurities in methamphetamine by gas chromatography-mass spectrometry.

Determination of muscimol and ibotenic acid in Amanita mushrooms by high-performance liquid chromatography and liquid chromatography-tandem mass spectrometry.

Comparison and classification of methamphetamine seized in Japan and Thailand using gas chromatography with liquid-liquid extraction and solid-phase microextraction.

Development of a micropulverized extraction method for rapid toxicological analysis of methamphetamine in hair.

Interactions between 3,4-methylenedioxymethamphetamine, methamphetamine, ketamine, and caffeine in human intestinal Caco-2 cells and in oral administration to rats.

Uptake of 3,4-methylenedioxymethamphetamine and its related compounds by a proton-coupled transport system in Caco-2 cells.

Development of an on-site screening system for amphetamine-type stimulant tablets with a portable attenuated total reflection Fourier transform infrared spectrometer.

A fatal case of suspected anaphylaxis with cefoperazone and sulbactam: LC-MS analysis.

Analysis of amphetamine-type stimulants and their metabolites in plasma, urine and bile by liquid chromatography with a strong cation-exchange column-tandem mass spectrometry.

Determination of salvinorin A and salvinorin B in Salvia divinorum-related products circulated in Japan.

Evaluation method for linking methamphetamine seizures using stable carbon and nitrogen isotopic compositions: a complementary study with impurity profiling.

Rapid analysis of methamphetamine in hair by micropulverized extraction and microchip-based competitive ELISA.

Rapid identification and quantification of methamphetamine and amphetamine in hair by gas chromatography/mass spectrometry coupled with micropulverized extraction, aqueous acetylation and microextraction by packed sorbent.

Thermal desorption counter-flow introduction atmospheric pressure chemical ionization for direct mass spectrometry of ecstasy tablets.

Determination of 4-hydroxy-3-methoxymethamphetamine as a metabolite of methamphetamine in rats and human liver microsomes using gas chromatography-mass spectrometry and liquid chromatography-tandem mass spectrometry.

Degradation of N-hydroxy-3,4-methylenedioxymethamphetamine in aqueous solution and its prevention.

Homogeneity and stability of a candidate certified reference material for the determination of methamphetamine and amphetamine in hair.

Determination of amphetamine-type stimulants, cocaine and ketamine in human hair by liquid chromatography/linear ion trap-Orbitrap hybrid mass spectrometry.

Urinary excretion profiles of N-hydroxy-3,4-methylenedioxymethamphetamine in rats.

Synthesis and identification of urinary metabolites of 4-iodo-2,5-dimethoxyphenethylamine.

Distribution measurement of amphetamine-type stimulants in organs using micropulverized extraction and liquid chromatography/tandem mass spectrometry to complement drug distribution using mass spectrometry imaging.

Rapid, simple, and highly sensitive analysis of drugs in biological samples using thin-layer chromatography coupled with matrix-assisted laser desorption/ionization mass spectrometry.

Interaction of 3,4-methylenedioxymethamphetamine and methamphetamine during metabolism by in vitro human metabolic enzymes and in rats.

Degradation pathways of 4-methylmethcathinone in alkaline solution and stability of methcathinone analogs in various pH solutions.

Distribution measurements of 3,4-methylenedioxymethamphetamine and its metabolites in organs by matrix-assisted laser desorption/ionization imaging mass spectrometry using an automatic matrix spraying system with an air brush and a turntable.

Chemical profiling of seized methamphetamine putatively synthesized from phenylacetic acid derivatives.

Identification and differentiation of methcathinone analogs by gas chromatography-mass spectrometry.

Time-course measurements of caffeine and its metabolites extracted from fingertips after coffee intake: a preliminary study for the detection of drugs from fingerprints.

Applicability of chemically modified capillaries in chiral capillary electrophoresis for methamphetamine profiling.

Determination of zolpidem in human hair by micropulverized extraction based on the evaluation of relative extraction efficiency of seven psychoactive drugs from an incurred human hair specimen.

Utilization of matrix-assisted laser desorption/ionization imaging mass spectrometry to search for cannabis in herb mixtures.

The use of a sulfonated capillary on chiral capillary electrophoresis/mass spectrometry of amphetamine-type stimulants for methamphetamine impurity profiling.

Effectiveness of saliva and fingerprints as alternative specimens to urine and blood in forensic drug testing.

Genotyping of Toxic Pufferfish Based on Specific PCR-RFLP Products As Determined by Liquid Chromatography/Quadrupole-Orbitrap Hybrid Mass Spectrometry.

Micro-pulverized extraction pretreatment for highly sensitive analysis of 11-nor-9-carboxy-Δ(9)-tetrahydrocannabinol in hair by liquid chromatography/tandem mass spectrometry.

Highly sensitive quantification of unconjugated 11-nor-9-carboxy-Δ(9)-tetrahydrocannabinol in a cannabis user's hair using micropulverized extraction.

Time-course measurements of drug concentrations in hair and toenails after single administrations of pharmaceutical products.

Approaching over 10 000-fold sensitivity increase in chiral capillary electrophoresis: Cation-selective exhaustive injection and sweeping cyclodextrin-modified micellar electrokinetic chromatography.

Next-generation sequencing analysis of off-ladder alleles due to migration shift caused by sequence variation at D12S391 locus.