Ryoko Arai

Kawasaki, 2109501, Japan

Last Updated: 09/26/2026

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Found 12 publications

Rapid determination of heavy metals and arsenic in herbal medicines using energy-dispersive X-ray fluorescence spectrometry.

Rapid determination of heavy metals and arsenic in herbal medicines using energy-dispersive X-ray fluorescence spectrometry.

Journal: Journal of natural medicines

Published: July 24, 2025

Relationship between the root processing method and quality of herbal medicine of Rauvolfia serpentina cultivated in Japan.

Relationship between the root processing method and quality of herbal medicine of Rauvolfia serpentina cultivated in Japan.

Journal: Fitoterapia

Published: March 07, 2024

Quantitative Determination Method of Aconitum Monoester Alkaloids Using Relative Molar Sensitivity (RMS) for the Assay in the Japanese Pharmacopoeia

Quantitative Determination Method of Aconitum Monoester Alkaloids Using Relative Molar Sensitivity (RMS) for the Assay in the Japanese Pharmacopoeia

Journal: Yakugaku zasshi : Journal of the Pharmaceutical Society of Japan

Published: August 09, 2023

HPLC analysis of ammonium glycyrrhizate listed in the European, United States, and Japanese Pharmacopoeias under reported and modified conditions: revision of the peak assignment for 18α-glycyrrhizin in the European and United States Pharmacopoeias.

HPLC analysis of ammonium glycyrrhizate listed in the European, United States, and Japanese Pharmacopoeias under reported and modified conditions: revision of the peak assignment for 18α-glycyrrhizin in the European and United States Pharmacopoeias.

Journal: Journal of natural medicines

Published: July 07, 2022

The long-term effect of biologics in patients with ulcerative colitis emerging from a large Japanese cohort.

The long-term effect of biologics in patients with ulcerative colitis emerging from a large Japanese cohort.

Journal: Scientific reports

Published: January 16, 2022

UHPLC/MS and NMR-Based Metabolomic Analysis of Dried Water Extract of Citrus-Type Crude Drugs.

UHPLC/MS and NMR-Based Metabolomic Analysis of Dried Water Extract of Citrus-Type Crude Drugs.

Journal: Chemical & pharmaceutical bulletin

Published: May 24, 2021

Miroestrol Quantification in Pueraria mirifica Crude Drugs and Products by Single-Reference UPLC/PDA/MS Using Relative Molar Sensitivities to Kwakhurin.

Miroestrol Quantification in Pueraria mirifica Crude Drugs and Products by Single-Reference UPLC/PDA/MS Using Relative Molar Sensitivities to Kwakhurin.

Journal: Chemical & pharmaceutical bulletin

Published: April 01, 2021

A simple and rapid method to simultaneously analyze ciclesonide and its impurities in a ciclesonide metered-dose inhaler using on-line supercritical fluid extraction/supercritical fluid chromatography/quadrupole time-of-flight mass spectrometry.

A simple and rapid method to simultaneously analyze ciclesonide and its impurities in a ciclesonide metered-dose inhaler using on-line supercritical fluid extraction/supercritical fluid chromatography/quadrupole time-of-flight mass spectrometry.

Journal: Journal of pharmaceutical and biomedical analysis

Published: March 25, 2021

Temporary hypertension and white coat hypertension in the first trimester as risk factors for preeclampsia.

Temporary hypertension and white coat hypertension in the first trimester as risk factors for preeclampsia.

Journal: Hypertension research : official journal of the Japanese Society of Hypertension

Published: May 01, 2019

Analysis of an Impurity, N-Nitrosodimethylamine, in Valsartan Drug Substances and Associated Products Using GC-MS.

Analysis of an Impurity, N-Nitrosodimethylamine, in Valsartan Drug Substances and Associated Products Using GC-MS.

Journal: Biological & pharmaceutical bulletin

Published: February 07, 2019

Rapid and efficient high-performance liquid chromatography analysis of N-nitrosodimethylamine impurity in valsartan drug substance and its products.

Rapid and efficient high-performance liquid chromatography analysis of N-nitrosodimethylamine impurity in valsartan drug substance and its products.

Journal: Scientific reports

Published: January 04, 2019

Effect of co-solutes and process variables on crystallinity and the crystal form of freeze-dried myo-inositol.

Effect of co-solutes and process variables on crystallinity and the crystal form of freeze-dried myo-inositol.

Journal: International journal of pharmaceutics

Published: March 14, 2016

Showing 1-12 of 12

Last Updated: 09/26/2026