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  1. Article ; Online: Bioaccessibility of Cu, Mn, Fe, and Zn in Fruit and Vegetables by the In Vitro UBM and Statistical Evaluation of the Results.

    Tokalıoğlu, Şerife

    Biological trace element research

    2022  Volume 201, Issue 3, Page(s) 1538–1546

    Abstract: The total, gastric, and gastro-intestinal Cu, Mn, Fe, and Zn concentrations in eight fruit and vegetable samples were investigated. The unified bioaccessibility method (UBM) developed by BARGE (Bioaccessibility Research Group of Europe) was performed for ...

    Abstract The total, gastric, and gastro-intestinal Cu, Mn, Fe, and Zn concentrations in eight fruit and vegetable samples were investigated. The unified bioaccessibility method (UBM) developed by BARGE (Bioaccessibility Research Group of Europe) was performed for in vitro bioaccessibility experiments. Total and bioaccessible concentrations of Cu, Mn, Fe, and Zn were determined by ICP-OES and ICP-MS, respectively. The accuracy of the methods was verified using BGS 102 for the BARGE UBM and SRM 1573a for total analysis. The mean BF (%) order for Cu, Mn, Fe, and Zn was Mn (101) > Zn (88) > Fe (60) > Cu (30) in gastric phase and Mn (78) > Zn (69) > Fe (46) > Cu (29) in gastro-intestinal phase. The results show that Mn and Zn in all the samples have the greatest bioaccessible values, while the values for Cu are much lower. The relationships among total, gastric, and gastro-intestinal element concentrations were investigated using statistical analysis such as correlation analysis, principal component analysis (PCA), and cluster analysis (CA). Total and bioaccessible Cu, Mn, and Zn concentrations were significantly correlated with each other.
    MeSH term(s) Europe ; Fruit ; Gastrointestinal Tract ; Vegetables ; Zinc ; Metals, Heavy/analysis
    Chemical Substances Zinc (J41CSQ7QDS) ; Metals, Heavy
    Language English
    Publishing date 2022-05-04
    Publishing country United States
    Document type Journal Article
    ZDB-ID 445336-0
    ISSN 1559-0720 ; 0163-4984
    ISSN (online) 1559-0720
    ISSN 0163-4984
    DOI 10.1007/s12011-022-03253-z
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  2. Article ; Online: Bioaccessibility of Cu, Mn, Fe, and Zn in Fruit and Vegetables by the In Vitro UBM and Statistical Evaluation of the Results

    Tokalıoğlu, Şerife

    Biol Trace Elem Res. 2023 Mar., v. 201, no. 3 p.1538-1546

    2023  

    Abstract: The total, gastric, and gastro-intestinal Cu, Mn, Fe, and Zn concentrations in eight fruit and vegetable samples were investigated. The unified bioaccessibility method (UBM) developed by BARGE (Bioaccessibility Research Group of Europe) was performed for ...

    Abstract The total, gastric, and gastro-intestinal Cu, Mn, Fe, and Zn concentrations in eight fruit and vegetable samples were investigated. The unified bioaccessibility method (UBM) developed by BARGE (Bioaccessibility Research Group of Europe) was performed for in vitro bioaccessibility experiments. Total and bioaccessible concentrations of Cu, Mn, Fe, and Zn were determined by ICP-OES and ICP-MS, respectively. The accuracy of the methods was verified using BGS 102 for the BARGE UBM and SRM 1573a for total analysis. The mean BF (%) order for Cu, Mn, Fe, and Zn was Mn (101) > Zn (88) > Fe (60) > Cu (30) in gastric phase and Mn (78) > Zn (69) > Fe (46) > Cu (29) in gastro-intestinal phase. The results show that Mn and Zn in all the samples have the greatest bioaccessible values, while the values for Cu are much lower. The relationships among total, gastric, and gastro-intestinal element concentrations were investigated using statistical analysis such as correlation analysis, principal component analysis (PCA), and cluster analysis (CA). Total and bioaccessible Cu, Mn, and Zn concentrations were significantly correlated with each other.
    Keywords bioavailability ; cluster analysis ; fruits ; principal component analysis ; vegetables ; Europe
    Language English
    Dates of publication 2023-03
    Size p. 1538-1546.
    Publishing place Springer US
    Document type Article ; Online
    ZDB-ID 445336-0
    ISSN 1559-0720 ; 0163-4984
    ISSN (online) 1559-0720
    ISSN 0163-4984
    DOI 10.1007/s12011-022-03253-z
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  3. Article ; Online: A zirconium metal-organic framework functionalized with a S/N containing carboxylic acid (MOF-808(Zr)-Tz) as an efficient sorbent for the ultrafast and selective dispersive solid phase micro extraction of chromium, silver, and rhodium in water samples.

    Tokalıoğlu, Şerife / Moghaddam, Seyed Taeed Hosseini / Demir, Selçuk

    Talanta

    2024  Volume 274, Page(s) 126094

    Abstract: Metal-organic frameworks (MOFs) are good adsorbents for targeted chemicals with their adjustable properties. Herein, we prepared a zirconium based MOF (MOF-808(Zr)) and functionalized it employing 2-mercapto-4-methyl-5-thiazolacetic acid (MOF-808(Zr)-Tz). ...

    Abstract Metal-organic frameworks (MOFs) are good adsorbents for targeted chemicals with their adjustable properties. Herein, we prepared a zirconium based MOF (MOF-808(Zr)) and functionalized it employing 2-mercapto-4-methyl-5-thiazolacetic acid (MOF-808(Zr)-Tz). The prepared MOFs were characterized by XRD, FTIR, SEM-EDX, TGA, N
    Language English
    Publishing date 2024-04-16
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1500969-5
    ISSN 1873-3573 ; 0039-9140
    ISSN (online) 1873-3573
    ISSN 0039-9140
    DOI 10.1016/j.talanta.2024.126094
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  4. Article ; Online: Selective and fast magnetic dispersive solid phase micro-extraction of copper and lead in water and vegetables after synthesis of magnetic mesoporous carbon.

    Tokalıoğlu, Şerife / Shahir, Shukria / Yılmaz, Yakup / Patat, Şaban

    Talanta

    2023  Volume 266, Issue Pt 1, Page(s) 125002

    Abstract: Magnetic mesoporous carbon ( ... ...

    Abstract Magnetic mesoporous carbon (Fe
    Language English
    Publishing date 2023-07-29
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1500969-5
    ISSN 1873-3573 ; 0039-9140
    ISSN (online) 1873-3573
    ISSN 0039-9140
    DOI 10.1016/j.talanta.2023.125002
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  5. Article ; Online: Environmentally friendly nanoflower Al

    Tokalıoğlu, Şerife / Demirişler, Melike Selenay / Şahan, Halil / Patat, Şaban

    Analytical methods : advancing methods and applications

    2023  Volume 15, Issue 43, Page(s) 5846–5854

    Abstract: A fast and simple dispersive solid-phase microextraction method (d-SPμE) was described for the determination of copper and lead in food, water, and sediments using FAAS. Firstly, nanoflower ... ...

    Abstract A fast and simple dispersive solid-phase microextraction method (d-SPμE) was described for the determination of copper and lead in food, water, and sediments using FAAS. Firstly, nanoflower Al
    Language English
    Publishing date 2023-11-09
    Publishing country England
    Document type Journal Article
    ZDB-ID 2515210-5
    ISSN 1759-9679 ; 1759-9660
    ISSN (online) 1759-9679
    ISSN 1759-9660
    DOI 10.1039/d3ay01579c
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  6. Article ; Online: Dispersive Solid-phase Microextraction of Lead in Waters and Edible Lettuce and Dill Extracts in the Unified Bioaccessibility Method (UBM) Saliva Solution.

    Tokalıoğlu, Şerife / Shahir, Shukria / Akgül, Ebru Tekneci / Şenkal, Bahire Filiz

    Biological trace element research

    2023  

    Abstract: A new thiosemicarbazide-modified, sulfonamide-based poly (styrene) adsorbent (T-CSPS) was prepared starting from the reaction of chlorosulfonated polystyrene and thiosemicarbazide. It was characterized by SEM-EDX, FT-IR, and zeta potential. The T-CSPS ... ...

    Abstract A new thiosemicarbazide-modified, sulfonamide-based poly (styrene) adsorbent (T-CSPS) was prepared starting from the reaction of chlorosulfonated polystyrene and thiosemicarbazide. It was characterized by SEM-EDX, FT-IR, and zeta potential. The T-CSPS was used as an adsorbent for the first time for the dispersive solid-phase microextraction (d-SPµE) and preconcentration of Pb(II) ions from waters and dill and lettuce extracts in the unified bioaccessibility method (UBM) saliva. Lead was then determined using the FAAS. In the first step of optimization, the solution pH was changed from 2 to 8, and pH 4 with a recovery value of 103% ± 5 was selected. Two milliliters of 2 mol L
    Language English
    Publishing date 2023-12-20
    Publishing country United States
    Document type Journal Article
    ZDB-ID 445336-0
    ISSN 1559-0720 ; 0163-4984
    ISSN (online) 1559-0720
    ISSN 0163-4984
    DOI 10.1007/s12011-023-04001-7
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  7. Article ; Online: Speciation of chromium in water samples and lettuce extracts in the unified bioaccessibility method (UBM) saliva solution by vortex assisted-dispersive solid phase microextraction

    Tokalıoğlu, Şerife / Shahir, Shukria / Şenkal, Bahire Filiz / Akgül, Ebru Tekneci

    Journal of Food Composition and Analysis. 2023 May, v. 118 p.105210-

    2023  

    Abstract: In this study, a new sulfonamide based polymeric adsorbent (5ATT-CSPS) was prepared with reaction between 5-Amino-1,3,4-thiadiazole-2-thiol and chlorosulfonated polystyrene resin and characterized by FT-IR, FESEM-EDX, XPS, zeta potential. It was used for ...

    Abstract In this study, a new sulfonamide based polymeric adsorbent (5ATT-CSPS) was prepared with reaction between 5-Amino-1,3,4-thiadiazole-2-thiol and chlorosulfonated polystyrene resin and characterized by FT-IR, FESEM-EDX, XPS, zeta potential. It was used for the first time as an adsorbent for speciation of chromium in various water samples and lettuce extracts in UBM saliva by dispersive solid phase micro extraction (d-SPµE). The total chromium concentration was determined by F AAS. The parameters affecting the recovery of Cr(III) such as pH, contact times, elution conditions, sample volume, co-existing ions and adsorption capacity were optimized. The adsorbent demonstrated a good performance for adsorption of Cr(III) (R%≥95). It was quantitatively adsorbed in the range of pH 2.0-4.0 whereas Cr(VI) was not adsorbed in the pH range of 2.0-8.0. Therefore Cr(VI) concentration was calculated indirectly. The elution was achieved by 5 mL of 2 mol L⁻¹ HNO₃. Adsorption and elution contact times of the adsorbent were 3 min and 2 min, respectively. The preconcentration factor of the method was found to be 8. Considering optimal conditions, limit of detection was found to be 2.9 µg L⁻¹, and precision of the method (as RSD%) was found to be ≤ 4.3%. The adsorption capacity of the 5ATT-CSPS for Cr(III) was 25 mg g⁻¹. The accuracy of this method was verified by analyzing TMDA-70 certified reference material and by recovery studies in spiked water samples and lettuce extracts in the unified bioaccessibility method (UBM) saliva.
    Keywords adsorbents ; adsorption ; bioavailability ; chromium ; detection limit ; food composition ; lettuce ; pH ; polystyrenes ; saliva ; solid phase microextraction ; zeta potential ; 5ATT-CSPS ; Chromium speciation ; D-SPµE ; Water ; Lettuce extracts in saliva ; Food analysis
    Language English
    Dates of publication 2023-05
    Publishing place Elsevier Inc.
    Document type Article ; Online
    ZDB-ID 743572-1
    ISSN 0889-1575 ; 1096-0481
    ISSN 0889-1575 ; 1096-0481
    DOI 10.1016/j.jfca.2023.105210
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    Z 4776: Show issues

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  8. Article: Determination of trace elements in commonly consumed medicinal herbs by ICP-MS and multivariate analysis.

    Tokalıoğlu, Şerife

    Food chemistry

    2012  Volume 134, Issue 4, Page(s) 2504–2508

    Abstract: The concentrations of Cr, Mn, Fe, Co, Ni, Cu, Zn, Rb, Sr and Pb elements in thirty medicinal herb samples widely consumed in Kayseri, Turkey were determined by using inductively coupled plasma mass spectrometry (ICP-MS). The samples were digested with ... ...

    Abstract The concentrations of Cr, Mn, Fe, Co, Ni, Cu, Zn, Rb, Sr and Pb elements in thirty medicinal herb samples widely consumed in Kayseri, Turkey were determined by using inductively coupled plasma mass spectrometry (ICP-MS). The samples were digested with concentrated nitric acid and hydrogen peroxide in a microwave system. The decreasing sequence of the mean metal levels in medicinal herbs is as follows: Fe>Sr>Mn>Zn>Rb>Cu>Ni>Cr>Co>Pb. Correlation analysis, principal component analysis and cluster analysis were applied to the data matrix to evaluate analytical results. It was found that four principal components account for 80.6% of the total variance in the data. In order to verify the accuracy of the method, GBW07605 Tea Certified Reference Material was analysed.
    MeSH term(s) Mass Spectrometry/methods ; Plants, Medicinal/chemistry ; Principal Component Analysis ; Trace Elements/analysis
    Chemical Substances Trace Elements
    Language English
    Publishing date 2012-10-15
    Publishing country England
    Document type Evaluation Studies ; Journal Article
    ZDB-ID 243123-3
    ISSN 1873-7072 ; 0308-8146
    ISSN (online) 1873-7072
    ISSN 0308-8146
    DOI 10.1016/j.foodchem.2012.04.093
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  9. Article: Stability of Arsenic Species During Bioaccessibility Assessment Using the In Vitro UBM and HPLC-ICP-MS Detection

    Tokalıoğlu, Şerife / Clough, Robert / Foulkes, Mike / Worsfold, Paul

    Biological trace element research. 2020 Nov., v. 198, no. 1

    2020  

    Abstract: The stability of four major arsenic (As) species during application of the BARGE (Bioaccessibility Research Group of Europe) unified bioaccessibility method (UBM) has been assessed. The concentrations of As species in the UBM gastric and gastro- ... ...

    Abstract The stability of four major arsenic (As) species during application of the BARGE (Bioaccessibility Research Group of Europe) unified bioaccessibility method (UBM) has been assessed. The concentrations of As species in the UBM gastric and gastro-intestinal (gastric + intestinal) phases were determined using HPLC-ICP-MS whilst the total As content in the samples was determined using ICP-MS alone. The arsenic species studied were arsenite As(III), arsenate As(V), dimethylarsinic acid (DMA) and monomethylarsonic acid (MMA). These species were separated in 10 min using an anion exchange column (Hamilton PRP-X100) with a mobile phase containing 20 mmol L⁻¹ NH₄H₂PO₄/1% methanol (pH 6.0). The recoveries of arsenic species spiked into the gastric and gastro-intestinal fluids were in the range 90–108%. No interconversion between As species was observed as a result of applying the BARGE UBM, which is a particularly important finding for the reliability of As(III) measurements. The accuracy of the BARGE UBM for in vitro extractable As(V) was verified using British Geological Survey (BGS) guidance material 102 (an ironstone soil). For a commercial rice sample, the bioaccessibility sequence of As was DMA > As(III) > As(V) for the gastric phase and As(III) > DMA > As(V) for the gastro-intestinal phase.
    Keywords anion exchange ; arsenates ; arsenic ; arsenites ; bioavailability ; cacodylic acid ; intestines ; methanol ; pH ; research ; rice ; soil ; surveys ; Europe
    Language English
    Dates of publication 2020-11
    Size p. 332-338.
    Publishing place Springer US
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 445336-0
    ISSN 1559-0720 ; 0163-4984
    ISSN (online) 1559-0720
    ISSN 0163-4984
    DOI 10.1007/s12011-020-02066-2
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  10. Article ; Online: Stability of Arsenic Species During Bioaccessibility Assessment Using the In Vitro UBM and HPLC-ICP-MS Detection.

    Tokalıoğlu, Şerife / Clough, Robert / Foulkes, Mike / Worsfold, Paul

    Biological trace element research

    2020  Volume 198, Issue 1, Page(s) 332–338

    Abstract: The stability of four major arsenic (As) species during application of the BARGE (Bioaccessibility Research Group of Europe) unified bioaccessibility method (UBM) has been assessed. The concentrations of As species in the UBM gastric and gastro- ... ...

    Abstract The stability of four major arsenic (As) species during application of the BARGE (Bioaccessibility Research Group of Europe) unified bioaccessibility method (UBM) has been assessed. The concentrations of As species in the UBM gastric and gastro-intestinal (gastric + intestinal) phases were determined using HPLC-ICP-MS whilst the total As content in the samples was determined using ICP-MS alone. The arsenic species studied were arsenite As(III), arsenate As(V), dimethylarsinic acid (DMA) and monomethylarsonic acid (MMA). These species were separated in 10 min using an anion exchange column (Hamilton PRP-X100) with a mobile phase containing 20 mmol L
    MeSH term(s) Arsenic/analysis ; Arsenicals ; Chromatography, High Pressure Liquid ; Europe ; Mass Spectrometry ; Reproducibility of Results
    Chemical Substances Arsenicals ; Arsenic (N712M78A8G)
    Language English
    Publishing date 2020-02-19
    Publishing country United States
    Document type Journal Article
    ZDB-ID 445336-0
    ISSN 1559-0720 ; 0163-4984
    ISSN (online) 1559-0720
    ISSN 0163-4984
    DOI 10.1007/s12011-020-02066-2
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