Journal
TALANTA
Volume 188, Issue -, Pages 332-338Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2018.05.085
Keywords
Polyoxometalates; Peroxidase-like; Fluorometric method; CdTe QDs; H2O2
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Funding
- NSFC [81402719]
- Norman Bethune Program of Jilin University [2015228]
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Polyoxometalates (POMs) have been proven to possess intrinsic peroxidase-like activity. However, by far, most of POMs with intrinsic peroxidase-like activity are stable at acid aqueous. Herein, we firstly utilized Na-10[alpha-SiW9O34] with the peroxidase-like property in basic pH condition to build a CdTe quantum dots (QDs)-based fluorometric method for detection of hydrogen peroxide. In the CdTe QDs stable pH value, Na-10[alpha-SiW9O34] can catalyze the decomposition of H(2)O(2 )into OH radicals that could efficiently quench the fluorescence of CdTe QDs. The limit of detection in this system were 3.8 nmol/L. The RSD of detection were range from 0.88% to 2.78%. And the linear range of H2O2 is from 7.8 x 10(-9) to 2.5 x 10(-7) mol/L. The rate of recovery of sample addition was between 93.99% and 110.02%. The results not only built a simple, sensitive and easy handing assay but also enlarge the POMs' analytic application field.
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