Zobrazeno 1 - 10
of 135
pro vyhledávání: '"Constantinos K. Zacharis"'
Publikováno v:
Advances in Sample Preparation, Vol 12, Iss , Pp 100135- (2024)
The present study describes an “one-step” derivatization and microextraction using a pH-switchable hydrophilicity solvent for the determination of amantadine and memantine in human urine by liquid chromatography and fluorescence detection. The pr
Externí odkaz:
https://doaj.org/article/62031b275a2e40bdb7f270abaf2af2c3
Publikováno v:
Molecules, Vol 29, Iss 17, p 4076 (2024)
In this report, a polytetrahydrofuran-coated polyester fabric phase sorptive extraction (FPSE) for the determination of doxycycline in human urine was described. The sol-gel polytetrahydrofuran sorbent proved to be superior against other sol-gel coat
Externí odkaz:
https://doaj.org/article/1e391f1ab06a46ceb3727a8a262da1e3
Autor:
Alexandros Kavrentzos, Elli Vastardi, Evangelos Karavas, Paraskevas D. Tzanavaras, Constantinos K. Zacharis
Publikováno v:
Pharmaceuticals, Vol 17, Iss 4, p 422 (2024)
Herein, a sensitive and selective gas chromatography-electron capture detector (GC-ECD) method was developed and validated for the quantification of trace levels of five bromo-containing genotoxic impurities in Febuxostat active pharmaceutical ingred
Externí odkaz:
https://doaj.org/article/ee4b5c9228e64a4db145711a4897533a
Publikováno v:
Chemosensors, Vol 11, Iss 12, p 577 (2023)
In the present study we report the development of an advantageous optical sensor for the speciation of Fe(III)/Fe(II). The sensor is based on the selective reaction of Fe(III) with a Desferal (Deferoxamine) reagent at pH = 2, while both Fe(III) and F
Externí odkaz:
https://doaj.org/article/a89e5c2c505b445199efeb75ac6ad76f
Publikováno v:
Molecules, Vol 28, Iss 17, p 6205 (2023)
A high-throughput fluorimetric assay for histidine was developed, using a 96-well plates platform. The analyte reacts selectively with o-phthalaldehyde under mild alkaline conditions to form a stable derivative. Instrumental-free detection was carrie
Externí odkaz:
https://doaj.org/article/1cbcfe7ca8a4446fa1d74b8c4d3fe9b3
Publikováno v:
Molecules, Vol 28, Iss 2, p 888 (2023)
In this communication, we describe the first analytical method for the determination of free histidine in hair care products (shampoos and conditioners). Cation-exchange chromatography combined with postcolumn derivatization and fluorimetric detectio
Externí odkaz:
https://doaj.org/article/1af7e3c437f844c18663153aaccf896b
Autor:
Evmorfia Asimakopoulou, Natalia Manousi, Nikoleta Anaxagorou, Abuzar Kabir, Kenneth G. Furton, Constantinos K. Zacharis
Publikováno v:
Chemosensors, Vol 10, Iss 12, p 537 (2022)
Herein, a fabric phase sorptive extraction-based scheme was reported for the determination of amphotericin B in human urine. The developed method allowed the direct extraction of the analyte from the biological matrix with improved selectivity, repea
Externí odkaz:
https://doaj.org/article/0ddece532e074eeda59e3b586a9f0eca
Autor:
Natalia Manousi, Anastasia Korpeti, Abuzar Kabir, Kenneth G. Furton, Constantinos K. Zacharis
Publikováno v:
Separations, Vol 9, Iss 12, p 433 (2022)
This article discusses the use of a sorbent-based microextraction technique employing a capsule device to isolate amphotericin B (AMB) from human serum before analysis by high performance liquid chromatography (HPLC). AMB is a macrocyclic compound us
Externí odkaz:
https://doaj.org/article/0f6b26cc3c454082b774c2ff2555e113
Autor:
Eleni Tsanaktsidou, Lamprini Kanata, Sofia Almpani, Constantinos K. Zacharis, Catherine K. Markopoulou
Publikováno v:
Separations, Vol 9, Iss 11, p 347 (2022)
In order to meet the analytical requirements of the European Medicines Agency (EMA), a new HPLC-FLD method was successfully developed using dansyl chloride for the derivatization and determination of the genotoxic impurities N-Nitrosodimethylamine (N
Externí odkaz:
https://doaj.org/article/64a2b1880b22428597ed8f99040be936
Autor:
Natalia Manousi, Christina Karavasili, Dimitrios G. Fatouros, Paraskevas D. Tzanavaras, Constantinos K. Zacharis
Publikováno v:
Pharmaceuticals, Vol 15, Iss 6, p 755 (2022)
Herein, a simple and rapid HPLC method for the determination of paracetamol milk-containing biorelevant media is proposed. The separation of the analyte from the milk-containing biorelevant media was accomplished isocratically using a mobile phase co
Externí odkaz:
https://doaj.org/article/3363e3ff2a8946ceb530c83f5c4df0c3