Browsing by Author "Gurkan, Ramazan"
Now showing items 1-20 of 28
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Application of simple, fast and eco-friendly ultrasound-assisted-cloud point extraction for pre-concentration of zinc, nickel and cobalt from foods and vegetables prior to their flame atomic absorption spectrometric determinations
Altunay, Nail; Elik, Adil; Bulutlu, Cuneyt; Gurkan, Ramazan (TAYLOR & FRANCIS LTD, 2018)In this study, a simple, fast and eco-friendly ultrasound-assisted-cloud point extraction method for extraction and pre-concentration of zinc, nickel and cobalt from vegetables and foods prior to their determination by ... -
Application of ultrasonic-assisted cloud point extraction/flame atomic absorption spectrometry (UA-CPE/FAAS) for preconcentration and determination of low levels of antimony in some beverage samples
Gurkan, Ramazan; Eser, Merve (SPRINGER, 2016)Due to be able to migrate or leach from food packaging materials into the foods and/or beverages, development of a new, sensitive and selective analytical methods for low levels of antimony as a food contaminant is of great ... -
Extraction and preconcentration of trace Al and Cr from vegetable samples by vortex-assisted ionic liquid-based dispersive liquid-liquid microextraction prior to atomic absorption spectrometric determination
Altunay, Nail; Yildirim, Emre; Gurkan, Ramazan (ELSEVIER SCI LTD, 2018)In the study, a simple, and efficient microextraction approach, which is termed as vortex-assisted ionic liquid-based dispersive liquid-liquid microextraction (VA-IL-DLLME), was developed for flame atomic absorption ... -
Extraction and reliable determination of acrylamide from thermally processed foods using ionic liquid-based ultrasound-assisted selective microextraction combined with spectrophotometry
Altunay, Nail; Elik, Adil; Gurkan, Ramazan (TAYLOR & FRANCIS LTD, 2018)Acrylamide (AAm) is a carcinogenic chemical that can form in thermally processed foods by the Maillard reaction of glucose with asparagine. AAm can easily be formed especially in frequently consumed chips and cereal-based ... -
Indirect determination of the flavor enhancer maltol in foods and beverages through flame atomic absorption spectrometry after ultrasound assisted-cloud point extraction
Altunay, Nail; Gurkan, Ramazan; Orhan, Ulas (ELSEVIER SCI LTD, 2017)A simple ultrasound assisted-cloud point extraction (UA-CPE) method was developed and combined with flame atomic absorption spectrometry (FAAS) for pre-concentration and indirect determination of the flavor enhancer maltol ... -
Innovative and practical deep eutectic solvent based vortex assisted microextraction procedure for separation and preconcentration of low levels of arsenic and antimony from sample matrix prior to analysis by hydride generation-atomic absorption spectrometry
Altunay, Nail; Elik, Adil; Gurkan, Ramazan (ELSEVIER SCI LTD, 2019)Considering the negative impacts on human health and the environment, determinations of arsenic (As) and antimony (Sb), is of unquestionable importance. The present study describes the development of innovative and practical ... -
Ion pair vortex assisted-ionic liquid based dispersive liquid-liquid microextraction for selective separation and preconcentration of 4-methylimidazole from caramel colour drinks and foodstuffs prior to its spectrophotometric determination
Altunay, Nail; Gurkan, Ramazan (ELSEVIER SCIENCE BV, 2019)In the study, a simple, fast, easy to use, cost-effective and green analytical method was developed for the selective extraction and determination of 4-methylimidazole (4-MeI) from caramel colored drinks and foods by using ... -
Ionic liquid based ion-pairing microextraction combined with spectrophotometry for preconcentration and quantitation of melamine in milk and milk-based products
Altunay, Nail; Demir, Ozge; Gurkan, Ramazan (ELSEVIER SCIENCE BV, 2017)A simple, rapid and economical ultrasound-assisted microextraction (UA-ME) procedure was developed for extraction and determination of trace amounts of melamine in milk products, followed at 310 nm by UV-Visible ... -
A micellar improved method for trace levels selenium quantification in food samples, alcoholic and nonalcoholic beverages through CPE/FAAS
Ulusoy, Halil Ibrahim; Yilmaz, Oznur; Gurkan, Ramazan (ELSEVIER SCI LTD, 2013)A useful preconcentration and determination method was proposed for trace selenium in food samples. The procedure is based on complex formation of Pyronine B with Se(IV) ions in the presence of sodium dodecyl sulphate (SDS) ... -
Microextraction and preconcentration of Mn and Cd from vegetables, grains and nuts prior to their determination by flame atomic absorption spectrometry using room temperature ionic liquid
Elik, Adil; Altunay, Nail; Gurkan, Ramazan (ELSEVIER SCIENCE BV, 2017)In this paper, a new and eco-friendly vortex-assisted dispersive liquid-liquid microextraction (VA-DLLME) procedure based on application of the room temperature ionic liquid (RTIL) 1-butyl-3-methylimidazolium chloride, ... -
Monitoring of some trace metals in honeys by flame atomic absorption spectrometry after ultrasound assisted-dispersive liquid liquid microextraction using natural deep eutectic solvent
Altunay, Nail; Elik, Adil; Gurkan, Ramazan (ELSEVIER SCIENCE BV, 2019)In the present study, a simple, low-cost and green ultrasound assisted- dispersive liquid liquid microextraction (UA-DLLME) procedure was developed for monitoring of trace copper (Cu), cadmium (Cd) and lead (Pb) in honey ... -
A new atomic absorption-based method development for indirect determination of histamine in fish samples, dairy products, and alcoholic beverages by flame AAS
Altunay, Nail; Gurkan, Ramazan; Tetik, Mehmet (ROYAL SOC CHEMISTRY, 2016)A new and sensitive analytical method for the indirect determination of histamine in fish samples, dairy products, and alcoholic beverages by flame atomic absorption spectrometry (FAAS) was developed. The method was based ... -
A new method of UA_CPE coupled with spectrophotometry for the faster and cost-effective detection of proline in fruit juice, honey, and wine
Dagdeviren, Semahat; Altunay, Nail; Sayman, Yasin; Gurkan, Ramazan (ELSEVIER SCI LTD, 2018)The study developed a new method for proline detection in honey, wine and fruit juice using ultrasound assisted-cloud point extraction (UA-CPE) and spectrophotometry. Initially, a quaternary complex was built, containing ... -
A New Ultrasonic Thermostatic-Assisted Cloud Point Extraction/Spectrophotometric Method for the Preconcentration and Determination of Bisphenol A in Food, Milk, and Water Samples in Contact with Plastic Products
Yildirim, Emre; Gurkan, Ramazan; Altunay, Nail (SPRINGER, 2017)Bisphenol A (BPA) contamination in foods and beverages usually occurs as a result of migration from the packages that contain it. In this context, a simple, easy-to-use, and efficient method was developed for the ... -
A new ultrasonic-assisted cloud-point-extraction procedure for pre-concentration and determination of ultra-trace levels of copper in selected beverages and foods by flame atomic absorption spectrometry
Altunay, Nail; Gurkan, Ramazan; Orhan, Ulas (TAYLOR & FRANCIS LTD, 2015)A new ultrasonic-assisted cloud-point-extraction (UA-CPE) method was developed for the pre-concentration of Cu(II) in selected beverage and food samples prior to flame atomic absorption spectrometric (FAAS) analysis. For ... -
A New Ultrasound Assisted-Cloud Point Extraction Method for the Determination of Trace Levels of Tin and Antimony in Food and Beverages by Flame Atomic Absorption Spectrometry
Altunay, Nail; Gurkan, Ramazan; Yildirim, Emre (SPRINGER, 2016)In the current study, a new ultrasonic-assisted cloud-point extraction (UA-CPE) method for the preconcentration and determination of antimony and tin in the selected food and beverages was developed by flame atomic absorption ... -
Photocatalytic TiO2-catalyzed degradation of bromophenol blue-mediated Mo(VI)-peroxo complexes inthe presence of SDS
Temel, Nuket Kartal; Gurkan, Ramazan; Ayan, Firat (DESALINATION PUBL, 2016)In the present study, the photocatalytic TiO2-catalyzed degradation of bromophenol blue (BPB)-mediated Mo(VI)-peroxo complexes in the presence of sodium dodecyl sulfate (SDS) under UV irradiation was investigated. The ... -
Preconcentration of sulfite from food and beverage matrices by ultrasonic assisted-cloud point extraction prior to its indirect determination by flame atomic absorption spectrometry
Altunay, Nail; Gurkan, Ramazan (ROYAL SOC CHEMISTRY, 2016)The additives used in foods and beverages may be harmful to human health. Thus, there is an increasing demand for analytical methods that allow the reliable identification and quantification of high-risk substances. In ... -
A simple and efficient approach for preconcentration of some heavy metals in cosmetic products before their determinations by flame atomic absorption spectrometry
Altunay, Nail; Gurkan, Ramazan (SCIENTIFIC TECHNICAL RESEARCH COUNCIL TURKEY-TUBITAK, 2016)In the current study, a simple and efficient analytical method for preconcentration and determination of Cd(II), Pb(II), and Sn(II) in some cosmetic samples, using ultrasonic assisted-cloud point extraction and flame atomic ... -
A simple and efficient ultrasonic-assisted extraction procedure combined with UV-Vis spectrophotometry for the pre-concentration and determination of folic acid (vitamin B-9) in various sample matrices
Gurkan, Ramazan; Altunay, Nail (TAYLOR & FRANCIS LTD, 2016)A simple and efficient ultrasonic-assisted extraction (UAE) procedure has been proposed for the pre-concentration of (2S)-2-[(4-{[(2-amino-4-hydroxypteridin-yl)methyl]amino}phenyl)formamido]pentanedioic acid (folic acid) ...