Search Results - "Gürkan, Ramazan"

A New Enrichment Method for Quantification of 5-Hydroxymethylfurfural by Indirect Flame Atomic Absorption Spectrometry in Honey and Jam Samples by Gürkan, Ramazan

“…Because of increasing amounts of 5-hydroxymethylfurfural (5-HMF) in processed foods and the complexity of the matrix, monitoring of trace 5-HMF requires…”
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Preparation and application of alcohol based deep eutectic solvents for extraction of curcumin in food samples prior to its spectrophotometric determination by Altunay, Nail, Elik, Adil, Gürkan, Ramazan

“…•Eight different alcohol based DES was prepared.•The study provided good Linearity and low detection limit.•The extraction for a sample takes about…”
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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 by Altunay, Nail, Elik, Adil, Gürkan, Ramazan

“…•Innovative and practical microextraction method was proposed for preconcentration of As(III) and Sb(III).•DESs were for the first time used for simultaneous…”
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Monitoring of some trace metals in honeys by flame atomic absorption spectrometry after ultrasound assisted-dispersive liquid liquid microextraction using natural deep eutectic solvent by Altunay, Nail, Elik, Adil, Gürkan, Ramazan

“…In the present study, a simple, low-cost and green ultrasound assisted- dispersive liquid liquid microextraction (UA-DLLME) procedure was developed for…”
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A new cloud point extraction procedure for determination of inorganic antimony species in beverages and biological samples by flame atomic absorption spectrometry by Altunay, Nail, Gürkan, Ramazan

“…[Display omitted] •A new CPE/FAAS method was developed for detection of inorganic Sb species.•The method is based on selective ion-pairing complexation of…”
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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 by Altunay, Nail, Yıldırım, Emre, Gürkan, Ramazan

“…•The variables affecting microextraction efficiency were extensively evaluated and optimized.•CTAB was used as ion pair to convert anionic metal complexes to…”
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Preconcentration and determination of vanadium and molybdenum in milk, vegetables and foodstuffs by ultrasonic-thermostatic-assisted cloud point extraction coupled to flame atomic absorption spectrometry by Gürkan, Ramazan, Korkmaz, Sema, Altunay, Nail

“…A new ultrasonic-thermostatic-assisted cloud point extraction procedure (UTA-CPE) was developed for preconcentration at the trace levels of vanadium (V) and…”
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Separation/preconcentration of ultra-trace levels of inorganic Sb and Se from different sample matrices by charge transfer sensitized ion-pairing using ultrasonic-assisted cloud point extraction prior to their speciation and determination by hydride generation AAS by Altunay, Nail, Gürkan, Ramazan

“…In the existing study, a new, simple and low cost process for separation/preconcentration of ultra-trace level of inorganic Sb and Se from natural waters,…”
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Development of a new analytical method for Pb preconcentration and its further determination in water and foodstuffs using relatively low-sensitivity flame atomic absorption spectrometry by Gürkan, Ramazan

“…The present study describes chelation of Pb(II) with ascorbic acid and formation of a charge-transfer sensitive ion-pair in the presence of Rhodamine 6G at pH…”
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Vortex assisted-ionic liquid based dispersive liquid liquid microextraction of low levels of nickel and cobalt in chocolate-based samples and their determination by FAAS by Altunay, Nail, Elik, Adil, Gürkan, Ramazan

“…In the study, a simple and green vortex assisted-ionic liquid based dispersive liquid liquid microextraction (VA-IL-DLLM) combined with flame atomic absorption…”
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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 by Altunay, Nail, Gürkan, Ramazan

“…In the study, a simple, fast, easy to use, cost-effective and green analytical method was developed for the selective extraction and determination of…”
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A novel, green and safe ultrasound-assisted emulsification liquid phase microextraction based on alcohol-based deep eutectic solvent for determination of patulin in fruit juices by spectrophotometry by Altunay, Nail, Elik, Adil, Gürkan, Ramazan

“…[Display omitted] •DES based UA-ELPME was applied to extract patulin from fruit juices for the first time.•The variables affecting extraction efficiency was…”
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Quantification of 5-hydroxymethylfurfural in honey samples and acidic beverages using spectrophotometry coupled with ultrasonic-assisted cloud point extraction by Gürkan, Ramazan, Altunay, Nail

“…•A simple method is proposed to quantify trace 5-HMF in honey and beverages.•The method is based on the complexation of 5-HMF with p-NPH at pH 4.0.•It is an…”
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Indirect determination of the flavor enhancer maltol in foods and beverages through flame atomic absorption spectrometry after ultrasound assisted-cloud point extraction by Altunay, Nail, Gürkan, Ramazan, Orhan, Ulaş

“…•A mixed micellar enhanced extraction method was developed prior to indirect analysis.•The method is based on reduction of Cu(II) with maltol in presence of…”
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Development of a simple, sensitive and inexpensive ion-pairing cloud point extraction approach for the determination of trace inorganic arsenic species in spring water, beverage and rice samples by UV–Vis spectrophotometry by Gürkan, Ramazan, Kır, Ufuk, Altunay, Nail

“…The experimental steps of the CPE procedure for detection of As(III), As(V) and total As in water, rice and beverage samples. [Display omitted] •The CPE was…”
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Determination of total Sn in some canned beverages by FAAS after separation and preconcentration by Gürkan, Ramazan, Altunay, Nail

“…Experimental steps of the proposed CPE procedure for detection of total Sn in canned beverages. •A new method CPE/FAAS was for detection of total Sn in canned…”
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Combination of Ultrasound-Assisted Cloud-Point Extraction with Spectrophotometry for Extraction, Preconcentration, and Determination of Low Levels of Free Formaldehyde from Cosmetic Products by Temel, Nuket Kartal, Gürkan, Ramazan

“…In the present study, a new preconcentration method was developed to quantify the free formaldehyde (FA) in hair cosmetics by combining ultrasound-assisted…”
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Natural deep eutectic solvent-based ultrasound-assisted-microextraction for extraction, pre-concentration and analysis of methylmercury and total mercury in fish and environmental waters by spectrophotometry by Altunay, Nail, Elik, Adil, Gürkan, Ramazan

“…In this study, a simple, pH-controlled, and natural deep eutectic solvent-based microextraction (NADES-ME) procedure is proposed before the spectrophotometric…”
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Vortex assisted-ionic liquid dispersive liquid-liquid microextraction and spectrophotometric determination of quercetin in tea, honey, fruit juice and wine samples after optimization based on response surface methodology by Altunay, Nail, Bingöl, Deniz, Elik, Adil, Gürkan, Ramazan

“…The aim of our study is to develop a new vortex assisted-ionic liquid dispersive liquid-liquid microextraction (VA-IL-DLLM) method for preconcentration and…”
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A preconcentration method for indirect determination of acrylamide from chips, crackers and cereal-based baby foods using flame atomic absorption spectrometry by Altunay, Nail, Gürkan, Ramazan, Orhan, Ulaş

“…Acrylamide is a toxic species for human health, and is a Maillard reaction product which forms spontaneously in heat treatment process of foods. Therefore, a…”
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