Yazar "Sürme Y." seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • Küçük Resim Yok
    Öğe
    Solid-phase extraction and spectrophotometric determination of Allura Red (E129) in foodstuff, soft drink, syrup and energy drink samples: a comparison study
    (Blackwell Publishing Ltd, 2016) Bişgin A.T.; Sürme Y.; Uçan M.; Narin İ.
    Amberlite XAD-7 and XAD-8 resins were used as adsorbents for preconcentration and determination of Allura Red (AR) food dye in aqueous medium. The effects of pH, sample volume, sample and eluent flow rates on the extraction of AR were optimised. The determination of dye was performed at 506.0 nm using spectrophotometry. Interference effects of matrix ions and some dyes were also investigated under optimised conditions. The methods permitted low detection limits which were 1.2 and 0.6 µg L-1 for XAD-7 and XAD-8, respectively. Adsorption behaviours were investigated by adsorption isotherms and zero charge pH experiments. Validations of the method were performed by determination of AR contents in some foodstuffs. AR contents of liquid samples were found between 58 and 440 µg mL-1. AR concentrations of solid samples were between 416 and 432 µg g-1. The XAD-7 and XAD-8 resins presented a fast and reliable potential to determine AR dye in real samples. © 2016 Institute of Food Science and Technology
  • Küçük Resim Yok
    Öğe
    Studies on the heavy metal removal efficiency and antibacterial activity of 2-(diphenylphosphino)aminopyridine
    (Macedonian Journal of Chemistry and Chemical Engineering, 2018) Sariöz Ö.; Malgaç B.; Sürme Y.; Ilk S.; Karaarslan M.
    The solvent extraction of metal picrates such as Ni2+, Cu2+, Co2+, Pb2+ and Cd2+ from the aqueous to the organic phase was studied using 2-(diphenylphosphino)aminopyridine (Ph2PNHpy). The effects of parameters including the pH of the aqueous phase and the ligand solution volume were investigated to de-termine the extraction ability of the ligand for metal ions. The results showed that the extraction percent-ages of metal ions were high at low pH values. The antibacterial activity of the aminophosphine was also screened against Escherichia coli (E. coli) ATCC 25922, Staphylococcus aureus (S. aureus) ATCC 25923, Pseudomonas syringae pv. tomato (P. syringae) DC300, Salmonella enterica serotype Typhmuri-um (S. typhmurium) SL 1344 and Streptococcus mutans (S. mutans) ATCC 25175. From the studies of antibacterial activity, it was observed that the ligand exhibited a potent inhibitory effect against all Gram-negative and Gram-positive bacteria with a diameter of inhibition zone ranging from 3.86 to 18.10 mm. The aminophosphine ligand (Ph2PNHpy) should be considered as a suitable bio-active molecule for anti-microbial material design and next-generation, non-toxic drug fabrication. The Ph2PNHpy obtained may have the potential for use as an antimicrobial additive for bioengineering applications. © 2018 özlem Sariöz, Burcu Malgaç, Yavuz Sürme, Sedef Ilk, Muhsin Karaarslan.