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Chee‐Leong Kee

Observed names: C.-L. Kee, Chee Leong Kee, Chee-Leong Kee, Kee, Chee-Leong
Observed institution: Health Sciences Authority
ORCID: 0000-0003-2648-7382
Observed ORCID: 0000-0003-2648-7382
OpenAlex ID: A5021799244
Screening of synthetic PDE-5 inhibitors and their analogues as adulterants: Analytical techniques and challenges
2013 · Dhavalkumar Narendrabhai Patel, Lin Li, et al. · Journal of Pharmaceutical and Biomedical Analysis · 161
A review of synthetic phosphodiesterase type 5 inhibitors (PDE-5i) found as adulterants in dietary supplements
2017 · Chee-Leong Kee, Xiaowei Ge, et al. · Journal of Pharmaceutical and Biomedical Analysis · 82
Rapid determination of sildenafil and its analogues in dietary supplements using gas chromatography–triple quadrupole mass spectrometry
2016 · S.U. Mokhtar, S.-T. Chin, et al. · Journal of Pharmaceutical and Biomedical Analysis · 49
Analysis of 40 weight loss compounds adulterated in health supplements by liquid chromatography quadrupole linear ion trap mass spectrometry
2015 · Yun Zeng, Yimin Xu, et al. · Drug Testing and Analysis · 47
Isolation and characterization of propoxyphenyl linked sildenafil and thiosildenafil analogues in health supplements
2012 · Chee-Leong Kee, Xiaowei Ge, et al. · Journal of Pharmaceutical and Biomedical Analysis · 24
Isolation and structural elucidation of flibanserin as an adulterant in a health supplement used for female sexual performance enhancement
2011 · Min-Yong Low, Lin Li, et al. · Journal of Pharmaceutical and Biomedical Analysis · 20
Application of Orbitrap-mass spectrometry to differentiate isomeric sildenafil- and thiosildenafil-like analogues used for the adulteration of dietary supplements
2015 · Chee-Leong Kee, Xiaowei Ge, et al. · Food Additives & Contaminants Part A · 19
Structural elucidation of a new sildenafil analogue using high‐resolution Orbitrap mass spectrometry
2013 · Chee‐Leong Kee, Xiaowei Ge, et al. · Rapid Communications in Mass Spectrometry · 18
Analytical methods for the detection and characterization of unapproved phosphodiesterase type 5 inhibitors (PDE-5i) used in adulteration of dietary supplements- a review
2023 · Chee-Leong Kee, Xiaowei Ge, et al. · Food Additives & Contaminants Part A · 15
Analysis of 32 toxic natural substances in herbal products by liquid chromatography quadrupole linear ion trap mass spectrometry
2015 · Yun Zeng, Yi-Ling Quek, et al. · Journal of Pharmaceutical and Biomedical Analysis · 12
Structural elucidation of propoxyphenyl isobutyl aildenafil, adulterant in a health supplement using high-resolution Orbitrap mass spectrometry
2014 · Chee-Leong Kee, Hwee-Ling Koh, et al. · Journal of Pharmaceutical and Biomedical Analysis · 12
Isolation and characterization of a tadalafil analogue, N -cyclopentyl nortadalafil in health supplement
2015 · Yimin Xu, Chee-Leong Kee, et al. · Journal of Pharmaceutical and Biomedical Analysis · 10
Isolation and characterization of a novel dithio-carbodenafil analogue from a health supplement
2017 · Chee-Leong Kee, Min-Yong Low, et al. · Journal of Pharmaceutical and Biomedical Analysis · 8
Analysis of 40 weight loss compounds adulterated in health supplements by liquid chromatography quadrupole linear ion trap mass spectrometry
2016 · Yun Zeng, Yimin Xu, et al. · Drug Testing and Analysis · 8
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Determination of N-nitroso folic acid in folic acid and multivitamin supplements by LC-MS/MS
2023 · Yun Zeng, Jessie Teo, et al. · Food Additives & Contaminants Part A · 7
Elucidation of the absolute configuration of a tadalafil analogue found as adulterant in a health supplement by mass spectrometry, chiroptical methods and NMR spectroscopy
2019 · Chee-Leong Kee, Lee-Cheng Chin, et al. · Journal of Pharmaceutical and Biomedical Analysis · 7
Analysis of N ‐nitrosodimethylamine in metformin hydrochloride products by high‐resolution accurate mass gas chromatography mass spectrometry
2022 · Chee‐Leong Kee, Yun Zeng, et al. · Rapid Communications in Mass Spectrometry · 6
Isolation and characterization of N-phenyl propoxyphenyl carbodenafil from an illegal coffee powder product
2021 · Chee-Leong Kee, Min-Yong Low, et al. · Journal of Pharmaceutical and Biomedical Analysis · 6
Isolation and characterization of N-hydroxyethyl dithio-desethyl carbodenafil from a health supplement
2020 · Chee-Leong Kee, Xiaowei Ge, et al. · Journal of Pharmaceutical and Biomedical Analysis · 5
Identification of Sildenafil Designer Analogues Found in Dietary Supplements
2016 · X. Ge, C.-L. Kee, et al. · Comprehensive analytical chemistry · 4
Analysis of ethylene glycol (EG) and diethylene glycol (DEG) in oral liquid products using gas chromatography in tandem with Orbitrap spectrometer (GC-Orbitrap)
2025 · Chee Leong Kee, Jing Quan Lim, et al. · Journal of Pharmaceutical and Biomedical Analysis · 2
Analysis of Amine Drugs Dissolved in Methanol by High‐Resolution Accurate Mass Gas Chromatography Mass Spectrometry, GC‐Orbitrap
2025 · Chee‐Leong Kee, Xiaowei Ge, et al. · Journal of Mass Spectrometry · 1
Analytical methods for the detection and characterization of unapproved phosphodiesterase type 5 inhibitors (PDE-5i) used in adulteration of dietary supplements- a review
2023 · Kee, Chee-Leong, Ge, Xiaowei, et al. · Figshare
Author response for "Analysis of N ‐nitrosodimethylamine in metformin hydrochloride products by high‐resolution accurate mass gas chromatography mass spectrometer"
2022 · Chee‐Leong Kee, Yun Zeng, et al. · Publons reviews and discussion
Works count: 24
Citation count: 523
H-index: 11
I10-index: 12
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