Browsing by Author "Ulusoy, Halil Ibrahim"
Now showing items 1-20 of 21
-
Determination of Trace Inorganic Mercury Species in Water Samples by Cloud Point Extraction and UV-Vis Spectrophotometry
Ulusoy, Halil Ibrahim (AOAC INT, 2014)A new micelle-mediated extraction method was developed for preconcentration of ultratrace Hg(II) ions prior to spectrophotometric determination. 2-(2'-Thiazolylazo)-p-cresol (TAC) and Ponpe 7.5 were used as the chelating ... -
Determination of trace uranyl ions in aquatic medium by a useful and simple method
Ulusoy, Halil Ibrahim (SPRINGER, 2014)Determination of trace uranyl ions was performed by using mixed micellar system and spectrophotometric determination. The method is based on cloud point extraction of uranyl ions after formation of an ion-association complex ... -
Development of a New Methodology for Determination of Vitamin B9 at Trace Levels by Ultrasonic-Assisted Cloud Point Extraction Prior to HPLC
Ulusoy, Halil Ibrahim; Acidereli, Hilal; Ulusoy, Songul; Erdogan, Selim (SPRINGER, 2017)A new analytic methodology based on ultrasonic-assisted cloud point extraction coupled with high-performance liquid chromatography (UA-CPE-HPLC) was developed and successfully applied to determine vitamin B9 in food samples. ... -
EFFECTIVE MERCURY REMOVAL USING A NEW DEVELOPED POLYMER CONTAINING 2-(2 ' THIAZOLYLAZO) P-CRESOL
Simsek, Selcuk; Ulusoy, Halil Ibrahim (GH ASACHI TECHNICAL UNIV IASI, 2016)A new material containing 2-(2' thiazolylazo) p-cresol (TAC) grafted poly acrylamide (PAA) was prepared and its adsorption ability was studied for the removal of inorganic mercury from aqueous media. Adsorption of Mercury ... -
FPSE-HPLC-DAD method for the quantification of anticancer drugs in human whole blood, plasma, and urine
Locatelli, Marcello; Tinari, Nicola; Grassadonia, Antonino; Tartaglia, Angela; Macerola, Daniela; Piccolantonio, Silvia; Sperandio, Elena; D'Ovidio, Cristian; Carradori, Simone; Ulusoy, Halil Ibrahim; Furton, Kenneth G.; Kabir, Abuzar (ELSEVIER SCIENCE BV, 2018)The present work describes a fast, sensitive and selective procedure for the analyses of aromatase inhibitors including anastrozole, letrozole and exemestane used in the treatment of metastatic breast cancer by high ... -
Magnetic solid phase extraction of trace paracetamol and caffeine in synthetic urine and wastewater samples by a using core shell hybrid material consisting of graphene oxide/multiwalled carbon nanotube/Fe3O4/SiO2
Ulusoy, Halil Ibrahim; Yilmaz, Erkan; Soylak, Mustafa (ELSEVIER SCIENCE BV, 2019)A new hybrid material was synthesized including magnetic graphene oxide/multiwalled carbon nanotube core shell (GO/MWCNT/Fe3O4/SiO2) and used as magnetic solid phase extraction adsorbent for separation and pre concentration ... -
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) ... -
A new approach to the determination of folic acid at trace levels: using a Fe(III)-folic acid complex to amplify analytical signal
Ulusoy, Songul; Acidereli, Hilal; Erdogan, Selim; Ulusoy, Halil Ibrahim (ROYAL SOC CHEMISTRY, 2016)A fast, efficient, cost-effective, and environmental-friendly analytical methodology was developed for preconcentration and determination of trace folic acid in food samples prior to high performance liquid chromatography ... -
A new magnetic nanodiamond/graphene oxide hybrid (Fe3O4@ND@GO) material for pre-concentration and sensitive determination of sildenafil in alleged herbal aphrodisiacs by HPLC-DAD system
Yilmaz, Erkan; Ulusoy, Halil Ibrahim; Demir, Ozge; Soylak, Mustafa (ELSEVIER SCIENCE BV, 2018)A sensitive analytical methodology was investigated to concentrate and determine of sildenafil citrate (SLC) present at trace level in herbal supplementary products. The proposed method is based on simple and sensitive ... -
Nitrosation and analysis of amino acid derivatives by isocratic HPLC
Ulusoy, Songul; Ulusoy, Halil Ibrahim; Pleissner, Daniel; Eriksen, Niels Thomas (ROYAL SOC CHEMISTRY, 2016)The objective of this study was to characterize the nitrosation of the classical amino acids by N2O3. Nitrosation of amino acids results in the formation of mainly alpha-hydroxy-acids that are suitable for isocratic HPLC ... -
PRECONCENTRATION AND DETERMINATION OF SAFRANINE T IN ENVIRONMENTAL WATER SAMPLES
Ulusoy, Songul; Ulusoy, Halil Ibrahim (GH ASACHI TECHNICAL UNIV IASI, 2018)A micelle-mediated preconcentration method has been developed for determination of Safranine T at trace amounts, which is widely used in textile industry. It can be evaluated as one of the dangereous chemicalsdue to its ... -
Recent Trends in Microextraction Techniques Employed in Analytical and Bioanalytical Sample Preparation
Kabir, Abuzar; Locatelli, Marcello; Ulusoy, Halil Ibrahim (MDPI, 2017)Sample preparation has been recognized as a major step in the chemical analysis workflow. As such, substantial efforts have been made in recent years to simplify the overall sample preparation process. Major focusses of ... -
Removal of uranyl ions in aquatic mediums by using a new material: Gallocyanine grafted hydrogel
Ulusoy, Halil Ibrahim; Simsek, Selcuk (ELSEVIER SCIENCE BV, 2013)A new material containing gallocyanine (GC) grafted polyacyril amide (PAA) was synthesized and its adsorption ability was examined for the removal of uranyl ions from aqueous media. The new developed adsorbent was characterized ... -
Simple and useful method for determination of inorganic selenium species in real samples based on UV-VIS spectroscopy in a micellar medium
Ulusoy, Halil Ibrahim (ROYAL SOC CHEMISTRY, 2015)A preconcentration and determination methodology utilizing the cloud point phenomenon was developed for the determination of inorganic selenium species using UV-VIS spectrophotometry. The cloud point extraction method was ... -
Simultaneous application of cloud point and solid-phase extraction for determination of Fe(III) and Cu(II) ions by using SnO2 nanopowder in micellar medium
Nekouei, Shahram; Nekouei, Farzin; Ulusoy, Halil Ibrahim; Noorizadeh, Hossein (DESALINATION PUBL, 2016)A new approach was developed for sensitive determination of Fe(III) and Cu(II) ions using SnO2 nanopowder in the micellar medium on the contrary conventional cloud point extraction studies. The presented method contains a ... -
Simultaneous pre-concentration of Pb and Sn in food samples and determination by atomic absorption spectrometry
Ulusoy, Halil Ibrahim; Aksoy, Ummugulsum; Akcay, Mehmet (SPRINGER, 2013)A cloud point extraction (CPE) method has been developed for the pre-concentration and simultaneous determination of lead [Pb(II)] and tin [Sn(II)] using Acridine Orange as complexing reagent and mediated by nonionic ... -
Surfactant-sensitized spectrophotometric determination of Hg(II) in water samples using 2-(2-thiazolylazo)-p-cresol as ligand and cetylpyridinium chloride as cationic surfactant
Gurkan, Ramazan; Cepken, Tugba; Ulusoy, Halil Ibrahim (SCIENTIFIC TECHNICAL RESEARCH COUNCIL TURKEY-TUBITAK, 2012)A new, reliable, surfactant-sensitized method is described for the spectrophotometric determination of total and dissolved inorganic mercury at trace levels. The method is based on the ternary complex formation of Hg(II) ... -
Synthesis and characterization of a composite polymeric material including chelating agent for adsorption of uranyl ions
Simsek, Selcuk; Senol, Zeynep Mine; Ulusoy, Halil Ibrahim (ELSEVIER SCIENCE BV, 2017)In this study, a versatile polymeric material was synthesized by grafting Calcon Carboxylic Acid (CCA), which is known as a chelating agent for some metal ions, to polyacrylamide (PAA) structure. Thus, the adsorptive ... -
Synthesis of a Useful and Economic Polymeric Material for Effective Removal of Bisphenol A
Simsek, Selcuk; Ulusoy, Halil Ibrahim (SPRINGER/PLENUM PUBLISHERS, 2018)A composite material containing polyacryl amide (PAA) and lignin (L) was developed and characterized for effective Bisphenol A (BPA) removal. Fundamentals of the proposed approach is based on adsorption of BPA molecules ... -
Trace analysis of quercetin in tea samples by HPLC-DAD system by means of a new nanocomposite including magnetic core-shell
Ulusoy, Songul; Yilmaz, Erkan; Erbas, Zeliha; Ulusoy, Halil Ibrahim; Soylak, Mustafa (TAYLOR & FRANCIS INC, not define)A new magnetic core-shell multiwalled carbon nanotube@nanodiamond nanocomposite was synthesized, characterized and used as magnetic solid-phase extraction material. The usability of material was checked on the separation ...