Titanium dioxide nanoparticles-based colorimetric sensors for determination of hydrogen peroxide and triacetone triperoxide (TATP).

Author(s) Gökdere, B.; Üzer, A.; Durmazel, S.; Erçağ, E.; Apak, R.
Journal Talanta
Date Published 2019 Sep 01

Due to its relatively simple preparation and readily available precursors, determination of triacetone triperoxide (TATP) by portable devices has become important. In this work, two different titanium dioxide nanoparticles (TiONPs)-based colorimetric sensors based on complex formation on the solid surface were developed for determination of HO and TATP. The first sensor, (3-aminopropyl)triethoxysilane (APTES) modified-TiONPs-based paper sensor (APTES@TiONPs), exploits peroxo-titanate binary complex formation between APTES@TiONPs and HO on chromatographic paper. The second sensor, 4-(2-pyridylazo)-resorcinol-modified-TiONPs-based solid sensor (PAR@TiONPs), relies on the formation of a ternary complex between Ti(IV), PAR and HO. The developed sensors were also applied to TATP determination after acidic hydrolysis of samples to HO. The limits of detection (LODs) of APTES@TiONPs-based paper sensor were 3.14 × 10 and 5.13 × 10 mol L for HO and TATP, respectively, whereas the LODs of PAR@TiONPs solid sensor were 6.06 × 10 and 3.54 × 10 mol L for HO and TATP, respectively. Possible interferences of common soil ions, passenger belongings used as camouflage materials during public transport (e.g., detergent, sweetener, acetylsalicylic acid and paracetamol-caffeine based analgesic drugs) and of other explosives were examined. The developed methods were statistically validated using t- and F- tests against the titanyl sulfate (TiOSO) colorimetric literature method.

DOI 10.1016/j.talanta.2019.04.071
ISSN 1873-3573
Citation Talanta. 2019;202:402410.

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