İlker Ün

Publications

Publications

Peer-reviewed articles, international key comparison (CCQM) reports and conference papers. 48 records.

2026

1 publications

  1. Report
    CCQM-K180: Polar analyte in high protein food matrix

    Polzer, J.; Mülow-Stollin, U.; Tadjine, F. …; Un, I. … 53 authors

    Bureau International des Poids et Mesuresdoi:10.59161/osxe9588

2025

5 publications

  1. Article
    Physico-chemical and spectroscopic characterization of hyaluronic acid hydrogels crosslinked with 1,4-butanediol diglycidyl ether (BDDE)

    Akgun, B. S.; Bostan, M. S.; Un, I.; Sadak, A. E.; Bahadori, F.; Eroglu, M. S.

    International Journal of Biological Macromolecules, 308, 142050doi:10.1016/j.ijbiomac.2025.142050

  2. Article
    A standard SI traceable phantom suitable for qMRI: design, manufacture and characterisation

    Clarkson, C.; Hill, S.; Gezer, T. D. …; Ün, İ. … 16 authors

    Metrologia, 62 (2), 025008doi:10.1088/1681-7575/adbcaf

  3. Report
    CCQM-K159 free amino acids in plasma

    Whyte, E.; Hambidge, T.; Ellison, S. …; Ün, İ. … 34 authors

    Metrologia, 62 (1A), 08004doi:10.1088/0026-1394/62/1a/08004

  4. Report
    Key comparison CCQM-K148.b - polar analyte in solid organic material: mass fraction of oxytetracycline

    Martos, G.; Westwood, S.; Bedu, M. …; Ün, İ. … 115 authors

    Metrologia, 62 (1A), 08012doi:10.1088/0026-1394/62/1a/08012

  5. Report
    Key comparison CCQM-K179 - polar analyte in solid organic material: mass fraction of oxytetracycline hydrochloride salt

    Martos, G.; Westwood, S.; Bedu, M. …; Ün, İ. … 97 authors

    Metrologia, 62 (1A), 08013doi:10.1088/0026-1394/62/1a/08013

2024

1 publications

  1. Proceedings
    Enabling reproducible measurements of Fat Fraction and Iron content using an SI traceable reference phantom

    Cashmore, M.; Clarkson, C.; Tatman, B. …; Un, I. … 40 authors

    Proceedings of the ISMRM & ISMRT Annual Meeting & Exhibition, 4838doi:10.58530/2024/4838

2023

1 publications

  1. Article
    Cyclotriphosphazene and tricarbazole based microporous hyper-crosslinked conjugated polymer for CCUS: Exceptional CO2 selectivity and high capacity CO2, CH4, and H2 capture

    Sadak, A. E.; Cucu, E.; Hamur, B.; Ün, İ.; Altundas, R.

    Journal of CO2 Utilization, 67, 102304doi:10.1016/j.jcou.2022.102304

2022

6 publications

  1. Article
    IMET-MRI – UPDATE ON EUROPEAN PROJECT AIMING AT IMPROVING METROLOGY IN QUANTITATIVE MRI

    Hall, M.; Cashmore, M.; Smith, N. …; Un, I. … 26 authors

    Physica Medica, 104, S40–S41doi:10.1016/s1120-1797(22)02209-8

  2. Article
    Assessing the concentration of conjugated fatty acids within pomegranate seed oil using quantitative nuclear magnetic resonance (qNMR)

    Ün, İ.; Ün, Ş. Ş.; Tanrıkulu, N.; Ünlü, A.; Ok, S.

    Phytochemical Analysis, 33 (3), 452–459doi:10.1002/pca.3101

  3. Report
    Supplementary comparison study - measurement capabilities for the quantification of ethanol in water

    Philipp, R.; Lalere, B.; Gantois, F. …; Ün, I. … 34 authors

    Metrologia, 59 (1A), 08015doi:10.1088/0026-1394/59/1a/08015

  4. Report
    Pilot study on peptide purity - glycated hexapeptide of HbA1c

    Josephs, R. D.; Liu, Q.; Martos, G. …; Ün, I. … 36 authors

    Metrologia, 59 (1A), 08007doi:10.1088/0026-1394/59/1a/08007

  5. Report
    Pilot study on peptide purity - hexapeptide of HbA0

    Josephs, R. D.; Liu, Q.; Martos, G. …; Ün, I. … 36 authors

    Metrologia, 59 (1A), 08014doi:10.1088/0026-1394/59/1a/08014

  6. Article
    External complexation of BODIPYs by CB[7] improves in-cell fluorescence imaging

    Ayhan, M. M.; Özcan, E.; Alkan, F.; Çetin, M.; Ün, İ.; Bardelang, D.; Çoşut, B.

    Materials Advances, 3 (1), 547–553doi:10.1039/d1ma00931a

2021

2 publications

  1. Report
    Mass fraction assignment of Bisphenol-A high purity material

    Westwood, S.; Martos, G.; Josephs, R. …; Ün, I. … 93 authors

    Metrologia, 58 (1A), 08015doi:10.1088/0026-1394/58/1a/08015

  2. Article
    Quantification of tributyltin in seawater using triple isotope dilution gas chromatography–inductively coupled plasma mass spectrometry achieving high accuracy and complying with European Water Framework Directive limits

    Tunç, M.; Ay, Ü.; Can, S. Z.; Bingöl, D.; Ün, İ.

    Journal of Chromatography A, 1637, 461847doi:10.1016/j.chroma.2020.461847

2020

2 publications

  1. Article
    Green synthesis, characterization and catalytic activity evaluation of palladium nanoparticles facilitated by Punica granatum peel extract

    Şahin Ün, Ş.; Ünlü, A.; Ün, İ.; Ok, S.

    Inorganic and Nano-Metal Chemistry, 1–9doi:10.1080/24701556.2020.1832118

  2. Report
    Pilot study on peptide purity—synthetic oxytocin

    Josephs, R. D.; Li, M.; Daireaux, A. …; Ün, I. … 19 authors

    Metrologia, 57 (1A), 08016doi:10.1088/0026-1394/57/1a/08016

2019

5 publications

  1. Article
    Development and validation of a suite of standards for the purity assignment of organic compounds by quantitative NMR spectroscopy

    Westwood, S.; Yamazaki, T.; Huang, T. …; Ün, I. … 10 authors

    Metrologia, 56 (6), 064001doi:10.1088/1681-7575/ab45cb

  2. Article
    The BIPM Mycotoxin Metrology Capacity Building and Knowledge Transfer Program: Accurate Characterization of a Pure Aflatoxin B 1 Material to Avoid Calibration Errors

    Josephs, R. D.; Li, X.; Li, X. …; Un, I. … 12 authors

    Journal of AOAC International, 102 (6), 1740–1748doi:10.5740/jaoacint.19-0144

  3. Report
    Mass fraction assignment of Amino Acids in acidic aqueous solution (CCQM-K78.a)

    Westwood, S.; Josephs, R.; Choteau, T. …; Ün, I. … 45 authors

    Metrologia, 56 (1A), 08010doi:10.1088/0026-1394/56/1a/08010

  4. Report
    Internal Standard Reference Data for qNMR: Dimethyl Terephthalate

    Westwood, S.; Stoppacher, N.; Martos, G.; Garrido, B.; Huang, T.; Saito, T.; Ün, İ.; et al.

    Bureau International des Poids et Mesures (BIPM)

  5. Report
    Purity evaluation guideline: zearalenone

    Westwood, S.; Josephs, R.; Choteau, T.; Li, X.; Garrido, B.; Ün, İ.; Yamazaki, T.; et al.

    Bureau International des Poids et Mesures (BIPM), Rapport BIPM-2019/06

2018

2 publications

  1. Article
    Analysis of olive oil for authentication and shelf life determination

    Ün, İ.; OK, S.

    Journal of Food Science and Technology, 55 (7), 2476–2487doi:10.1007/s13197-018-3165-3

  2. Report
    Mass fraction assignment of folic acid in a high purity material

    Westwood, S.; Josephs, R.; Choteau, T. …; Un, I. … 69 authors

    Metrologia, 55 (1A), 08013doi:10.1088/0026-1394/55/1a/08013

2017

5 publications

  1. Article
    Validation and sensitivity evaluation of the ID-GC-TOF-MS method for determination of PAHs in biogas

    Gokcen, T.; Bilsel, G.; Tarhan, T.; Un, I.; Goren, A. C.; van der Veen, A.

    Journal of Chemical Metrology, 11 (2), 78–85doi:10.25135/jcm.11.17.11.01

  2. Article
    Accurate determination of ethanol in water by qNMR: Validation and uncertainty assessment

    Ün, İ.; Goren, A. C.

    Journal of Chemical Metrology, 11 (1), 9–15doi:10.25135/jcm.2.17.03.035

  3. Report
    CCQM-K104 key comparison (avermectin B 1 a) on the characterization of organic substances for chemical purity

    Dai, X.; Zhang, W.; Li, H. … 23 authors

    Metrologia, 54 (1A), 08019doi:10.1088/0026-1394/54/1a/08019

  4. Report
    Key comparison study on peptide purity—synthetic human C-peptide

    Josephs, R. D.; Li, M.; Song, D. …; Ün, I. … 32 authors

    Metrologia, 54 (1A), 08007doi:10.1088/0026-1394/54/1a/08007

  5. Report
    Pilot study on peptide purity—synthetic human C-peptide

    Josephs, R. D.; Li, M.; Song, D. …; Ün, I. … 22 authors

    Metrologia, 54 (1A), 08011doi:10.1088/0026-1394/54/1a/08011

2016

2 publications

  1. Article
    Comparison of qNMR and HPLC-UV techniques for measurement of Coenzyme Q10 in dietary supplement capsules

    Ün, İ.; Vatansever, B.; Şimşek, A.; Gören, A. C.

    Journal of Chemical Metrology, 10 (1), 1–10

  2. Article
    Development and validation of PICAA method for the determination of the purity of synthetic human C-peptide

    Senal, M. O.; Vatansever, B.; Gören, A. C.; Ün, İ.; Akgöz, M.

    FEBS Journal, 283, 217

2014

2 publications

  1. Report
    Final report on key comparison CCQM-K55.c (L-(+)-Valine): Characterization of organic substances for chemical purity

    Westwood, S.; Josephs, R.; Choteau, T. …; Ün, I. … 83 authors

    Metrologia, 51 (1A), 08010–08010doi:10.1088/0026-1394/51/1a/08010

  2. Article
    Investigation of nucleophilic substitution pathway for the reactions of 1,4-benzodioxan-6-amine with chlorocyclophosphazenes

    İbişoğlu, H.; Beşli, S.; Yuksel, F.; Ün, İ.; Kılıç, A.

    Inorganica Chimica Acta, 409, 216–226doi:10.1016/j.ica.2013.09.030

2013

5 publications

  1. Article
    Phthalonitriles Functionalized for Click Chemistry. Design, Synthesis and Structural Characterization

    Zorlu, Y.; Ün, İ.; Hirel, C.; Dumoulin, F.; Ahsen, V.

    Journal of Chemical Crystallography, 43 (12), 636–645doi:10.1007/s10870-013-0459-1

  2. Article
    Comparative structural analysis of 4,5- and 3,6-dialkylsulfanylphthalonitriles of different bulkiness

    Zorlu, Y.; İşci, Ü.; Ün, İ.; Kumru, U.; Dumoulin, F.; Ahsen, V.

    Structural Chemistry, 24 (4), 1027–1038doi:10.1007/s11224-012-0126-8

  3. Article
    Syntheses, characterizations, thermal and photophysical properties of cyclophosphazenes containing adamantane units

    Ün, İ.; İbişoğlu, H.; Ün, Ş. Ş.; Çoşut, B.; Kılıç, A.

    Inorganica Chimica Acta, 399, 219–226doi:10.1016/j.ica.2013.01.028

  4. Article
    Ansa isomer selectivity in the reactions of cyclotetraphosphazene with octafluorohexane-1,6-diol

    Beşli, S.; Davies, D. B.; İbişoğlu, H.; Ün, İ.; Yuksel, F.; Kılıç, A.

    Polyhedron, 50 (1), 364–373doi:10.1016/j.poly.2012.11.035

  5. Article
    A phthalocyanine-fluorescein conjugate

    ÜN, İ.

    TURKISH JOURNAL OF CHEMISTRYdoi:10.3906/kim-1207-61

2012

2 publications

  1. Article
    Nucleophilic substitution reactions of adamantane derivatives with cyclophosphazenes

    Ün, İ.; İbişoğlu, H.; Kılıç, A.; Ün, Ş. Ş.; Yuksel, F.

    Inorganica Chimica Acta, 387, 226–233doi:10.1016/j.ica.2012.01.021

  2. Report
    Final report on key comparison CCQM-K55.a (estradiol): An international comparison of mass fraction purity assignment of estradiol

    Westwood, S.; Josephs, R.; Daireaux, A. … 35 authors

    Metrologia, 49 (1A), 08009–08009doi:10.1088/0026-1394/49/1a/08009

2011

1 publications

  1. Article
    The investigation of stereogenic properties of cyclotriphosphazene derivatives with two different chiral centres

    Ün, Ş. Ş.; Uslu, A.; Yeşilot, S.; Ün, İ.; Çoşut, B.; Yuksel, F.; Kılıç, A.

    Polyhedron, 30 (9), 1587–1594doi:10.1016/j.poly.2011.03.028

2010

1 publications

  1. Article
    Spiro, ansa-derivatives of cyclotetraphosphazenes with a tetrafluorobutane-1,4-diol

    Beşli, S.; İbişoğlu, H.; Kılıç, A.; Ün, İ.; Yuksel, F.

    Polyhedron, 29 (17), 3220–3228doi:10.1016/j.poly.2010.08.035

2009

4 publications

  1. Article
    The diverse behaviour of the P–Cl bonds in the spiro–cis–ansa spermidine derivative cyclotriphosphazene towards mono-functional nucleophilic reagents

    İbişoğlu, H.; Temur, B.; Ün, İ.

    Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 74 (2), 329–335doi:10.1016/j.saa.2009.06.010

  2. Article
    The reaction of thiophenoxide with amino-substituted chloro-cyclotriphosphazenes

    İbişoğlu, H.; Dal, H.; Hökelek, T.; Kılıç, A.; Ün, İ.; Vardı, S.

    Polyhedron, 28 (14), 2863–2870doi:10.1016/j.poly.2009.06.033

  3. Article
    Octasolketal-substituted phthalocyanines: synthesis and systematic study of metal effect and substitution pattern on 13C NMR

    Zorlu, Y.; Un, I.; Dumoulin, F.

    Journal of Porphyrins and Phthalocyanines, 13 (06), 760–768doi:10.1142/s1088424609000887

  4. Article
    Formation of novel spiro, spiroansa and dispiroansa derivatives of cyclotetraphosphazene from the reactions of polyfunctional amines with octachlorocyclotetraphosphazatetraene

    İbişoğlu, H.; Çiftçi, G. Y.; Kiliç, A.; Tanriverdi, E.; Ün, İ.; Dal, H.; Hökelek, T.

    Journal of Chemical Sciences, 121 (2), 125–135doi:10.1007/s12039-009-0014-y

2006

1 publications

  1. Article
    Structural investigations of phosphorus–nitrogen compounds. 7. Relationships between physical properties, electron densities, reaction mechanisms and hydrogen-bonding motifs of N3P3Cl(6 − n)(NHBu t ) n derivatives

    Bartlett, S. W.; Coles, S. J.; Davies, D. B.; Hursthouse, M. B.; İbişogˇlu, H.; Kiliç, A.; Shaw, R. A.; Ün, İ.

    Acta Crystallographica Section B Structural Science, 62 (2), 321–329doi:10.1107/s0108768106000851