Browsing by Author "Ulusoy, Songul"
Now showing items 1-6 of 6
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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. ... -
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 ... -
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 ... -
Simultaneous Determination of Vitamins B1 and B2 in Food Samples by Modified Cloud Point Extraction Method and HPLC-DAD
Ulusoy, Songul; Akcay, Mehmet (SPRINGER, 2018)A preconcentration and determination method was developed for vitamins B1 (thiamin) and B2 (riboflavin) at trace amounts based on cloud point extraction (CPE) and HPLC analysis. As a new approach in this method, Ag(I) ion ... -
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 ...