Browsing by Author "Onal, Armagan"
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A Review of Current Methods for the Determination of Acrylamide in Food Products
Tekkeli, Serife Evrim Kepekci; Onal, Cem; Onal, Armagan (2012-02-01)Acrylamide (AA) is a potentially carcinogenic substance which is formed during heating of food products containing carbohydrates and asparagine. It was first detected in food products in 2002. Since that time, several ... -
A review of the liquid chromatographic methods for the determination of biogenic amines in foods
Onal, Armagan; Tekkeli, Serife Evrim Kepekci; Onal, Cem (2013-05-01)Biogenic amines (BAs) are biologically active molecules which have aliphatic (putrescine, cadaverine, spermine, spermidine), aromatic (tyramine, phenylethylamine) or heterocyclic (histamine, tryptamine) structures. They ... -
ANALYTICAL METHODS FOR THE DETERMINATION OF POLYBROMINATED DIPHENYL ETHERS IN HUMAN MILK
ASRAM SAĞIROĞLU, ALİ; Onal, Armagan; DİNCEL, DEMET; Onal, Cem; TEKKELİ, ŞERİFE EVRİM (2020-03-01)Polybrominated diphenyl ethers (PBDEs), which are used as flame retardants, are widely used additives so many different kind of materials that are consumed by public. Current researches reveal a significant increase in the ... -
Determination of atorvastatin in human plasma by magnetic solid-phase extraction combined with HPLC and application to a pharmacokinetic study
Onal, Armagan; Tekkeli, Serife Evrim Kepekci; Durmus, ZEHRA (2016-01-01)A simple and sensitive analytical procedure by solid-phase extraction method combined with high-performance liquid chromatography and using of graphene-magnetite nanomaterials as sorbent has been developed for the determination ... -
Development and Validation of Spectrophotometric Methods for the Determination of Rasagiline in Pharmaceutical Preparations
Onal, Armagan; Bahadori, FATEMEH; Tekkeli, Serife Evrim Kepekci (2013-01-01)This study presents three simple, rapid, and accurate spectrophotometric methods for the determination of Rasagiline (RSG) in pharmaceutical preparations. The determination procedures depend on the reaction of RSG with ... -
LIQUID CHROMATOGRAPHIC ANALYSIS OF CAROTENOIDS IN FOODS
Onal, Cem; DİNCEL, DEMET; Sagirli, Olcay; Tekkeli, Serife Evrim Kepekci; Onal, Armagan (2019-06-01)Current scientific studies indicate that carotenoids (CRTDs) are beneficial for maintaining health and lowering the risk of different pathologies. Considering the increasing role of carotenoids in healthcare, determination ... -
MAGNETIC SOLID PHASE EXTRACTION FOR A NEW HPLC METHOD FOR THE DETERMINATION OF GEMIFLOXACIN IN HUMAN PLASMA AND BREAST MILK
Tekkeli, SerIfe Evrim Kepekci; Durmus, ZEHRA; Onal, Armagan; Kiziltas, Mustafa Volkan (2017-06-01)A simple analytical procedure, magnetic solid phase extraction combination to HPLC, has been developed for the analysis of gemifloxacin in human plasma and breast milk. Before chromatographic separation, magnetic solid ... -
Spectrofluorimetric determination of tobramycin in human serum and pharmaceutical preparations by derivatization with fluorescamine
Onal, Armagan; Tekkeli, Serife Evrim Kepekci; Sagirli, Olcay (2014-02-01) -
Spectrofluorimetric Methods for the Determination of Gemifloxacin in Tablets and Spiked Plasma Samples
Tekkeli, Serife Evrim Kepekci; Onal, Armagan (2011-05-01)Two new, sensitive and selective spectrofluorimetric methods have been developed for the determination of gemifloxacin (GFX) in tablets and spiked plasma samples. Gemifloxacin, as a primary amine compound, reacts with ... -
Two-dimensional liquid chromatographic analysis of ramelteon in human serum
Sagirli, Olcay; TEKKELİ, ŞERİFE EVRİM; Toker, Sidika Erturk; Onal, Armagan (2019-12-01)In this study, a selective and sensitive new 2D-LC method was developed for the determination of ramelteon in human serum. Separations were performed using the following systems: the first dimension consisted of a C18 (50 ...
