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Application of silicalite-modified electrode for the development of sucrose biosensor with improved characteristics.

Pyeshkova VM, Dudchenko OY, Soldatkin OO, Kasap BO, Lagarde F, Kurç BA, Dzyadevych SV - Nanoscale Res Lett (2015)

Bottom Line: Polyethylenimine/glutaraldehyde/silicalite-modified biosensors showed higher sensitivity compared with others type of biosensors.The obtained results had good correlation with results obtained by HPLC.Thus, polyethylenimine/glutaraldehyde/silicalite-modified biosensors have shown perspective characteristics for the development of effective conductometric enzyme biosensors.

View Article: PubMed Central - PubMed

Affiliation: Laboratory of Biomolecular Electronics, Institute of Molecular Biology and Genetics, National Academy of Sciences of Ukraine, 150 Zabolotnogo Str., 03680 Kyiv, Ukraine ; Institute of High Technologies, Taras Shevchenko National University of Kyiv, 64 Volodymyrska Street, 01601 Kyiv, Ukraine.

ABSTRACT
The application of silicalite for improvement of working characteristics of conductometric enzyme biosensors for determination of sucrose was studied in this research. Biosensors based on different types of silicalite-modified electrodes were studied and compared according to their analytical characteristics. Polyethylenimine/glutaraldehyde/silicalite-modified biosensors showed higher sensitivity compared with others type of biosensors. Moreover, the polyethylenimine/glutaraldehyde/silicalite sucrose biosensors were characterized by high selectivity and signal reproducibility (relative standard deviation (RSD) = 2.78% for glucose measurements and RSD = 3.2% for sucrose measurements). Proposed biosensors were used for determination of sucrose in different samples of beverages. The obtained results had good correlation with results obtained by HPLC. Thus, polyethylenimine/glutaraldehyde/silicalite-modified biosensors have shown perspective characteristics for the development of effective conductometric enzyme biosensors.

No MeSH data available.


Scanning electron microscope image of silicalite.
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Fig2: Scanning electron microscope image of silicalite.

Mentions: Silicalite was synthesized in the Middle East Technical University (Ankara, Turkey). The optimized molar composition of the solution used for synthesis of silicalite-1 is 1TPAOH:4TEOS:350H2O. Tetraethylorthosilicate (TEOS, 95%) was used as the silica source. Tetrapropylammonium hydroxide (TPAOH, 25%) was used as a template. By hydrolyzing tetraethoxysilane (TEOS) with tetrapropylammonium hydroxide (TPAOH) solution, a clear homogeneous solution was obtained at room temperature for 6 h under stirring. Afterwards, the resulting solution was placed in oven for 18 h at 125°C. Then to remove the unreacted material, the crystallized solid particles were centrifuged at 13,000 rpm, washed with deionized water, and dried at 80°C. The SEM (scanning electron microscope) image of synthesized silicalite depicted in Figure 2 shows that the prepared silicalite particles have size about 400 to 500 nm. X-ray diffraction (XRD) spectrum of silicalite is shown in Figure 3.Figure 2


Application of silicalite-modified electrode for the development of sucrose biosensor with improved characteristics.

Pyeshkova VM, Dudchenko OY, Soldatkin OO, Kasap BO, Lagarde F, Kurç BA, Dzyadevych SV - Nanoscale Res Lett (2015)

Scanning electron microscope image of silicalite.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4388068&req=5

Fig2: Scanning electron microscope image of silicalite.
Mentions: Silicalite was synthesized in the Middle East Technical University (Ankara, Turkey). The optimized molar composition of the solution used for synthesis of silicalite-1 is 1TPAOH:4TEOS:350H2O. Tetraethylorthosilicate (TEOS, 95%) was used as the silica source. Tetrapropylammonium hydroxide (TPAOH, 25%) was used as a template. By hydrolyzing tetraethoxysilane (TEOS) with tetrapropylammonium hydroxide (TPAOH) solution, a clear homogeneous solution was obtained at room temperature for 6 h under stirring. Afterwards, the resulting solution was placed in oven for 18 h at 125°C. Then to remove the unreacted material, the crystallized solid particles were centrifuged at 13,000 rpm, washed with deionized water, and dried at 80°C. The SEM (scanning electron microscope) image of synthesized silicalite depicted in Figure 2 shows that the prepared silicalite particles have size about 400 to 500 nm. X-ray diffraction (XRD) spectrum of silicalite is shown in Figure 3.Figure 2

Bottom Line: Polyethylenimine/glutaraldehyde/silicalite-modified biosensors showed higher sensitivity compared with others type of biosensors.The obtained results had good correlation with results obtained by HPLC.Thus, polyethylenimine/glutaraldehyde/silicalite-modified biosensors have shown perspective characteristics for the development of effective conductometric enzyme biosensors.

View Article: PubMed Central - PubMed

Affiliation: Laboratory of Biomolecular Electronics, Institute of Molecular Biology and Genetics, National Academy of Sciences of Ukraine, 150 Zabolotnogo Str., 03680 Kyiv, Ukraine ; Institute of High Technologies, Taras Shevchenko National University of Kyiv, 64 Volodymyrska Street, 01601 Kyiv, Ukraine.

ABSTRACT
The application of silicalite for improvement of working characteristics of conductometric enzyme biosensors for determination of sucrose was studied in this research. Biosensors based on different types of silicalite-modified electrodes were studied and compared according to their analytical characteristics. Polyethylenimine/glutaraldehyde/silicalite-modified biosensors showed higher sensitivity compared with others type of biosensors. Moreover, the polyethylenimine/glutaraldehyde/silicalite sucrose biosensors were characterized by high selectivity and signal reproducibility (relative standard deviation (RSD) = 2.78% for glucose measurements and RSD = 3.2% for sucrose measurements). Proposed biosensors were used for determination of sucrose in different samples of beverages. The obtained results had good correlation with results obtained by HPLC. Thus, polyethylenimine/glutaraldehyde/silicalite-modified biosensors have shown perspective characteristics for the development of effective conductometric enzyme biosensors.

No MeSH data available.