Add time:07/30/2019         Source:sciencedirect.com

We have developed a simple, colorimetric IRON TELLURIDE (cas 12023-03-9) (FeTe) nanorods (NRs) based system for the detection of mercury, mainly based on the cation exchange reaction between FeTe NRs and Hg2+. FeTe NRs (length, 105 ± 21 nm) react with Hg2+ to form HgTe NRs (length, 112 ± 26 nm) and consequently release Fe2+ ions that catalyzes the oxidation between a peroxidase substrate 2,2′-azino-bis(3-ethylbenzo-thiazoline-6-sulfonic acid) diammonium salt (ABTS) and H2O2. The concentration of Fe2+ and thereby Hg2+ can be determined by measuring the absorbance of the ABTS oxidized product at 418 nm. This approach allows the detection of Hg2+, with a limit of detection of 1.31 nM at a signal-to-noise ratio 3 and a linear range 5–100 nM (R2 = 0.99). The low-cost, simple, sensitive, and reproducible assay has been validated for the detection of Hg2+ in a blood sample (SRM 955c), with the result being in good agreement with that provided by National Institute of Standards and Technology.

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