Gold-copper film deposition on glassy-carbon electrode in determination of HgII trace by differential pulse anodic stripping voltammetry
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1.
Nhi Phương NT, Diễn PT, Long HT. Gold-copper film deposition on glassy-carbon electrode in determination of HgII trace by differential pulse anodic stripping voltammetry. hueuni-jns [Internet]. 2019Jul.23 [cited 2024Nov.14];128(1C):87-93. Available from: http://222.255.146.83/index.php/hujos-ns/article/view/5324

Abstract

A gold-copper film on the glassy-carbon electrode can be used to determine the trace amount of HgII by differential pulse anodic stripping voltammetry. The gold-copper film was in-situ deposited onto the glassy-carbon electrode surface in an aqueous solution containing HgII, HClO4 5 × 10-3 M, AuIII 0.2 mg/L, and CuII 0.05 mg/L at –1100 mV. In comparison with the gold film/glassy carbon electrode, this electrode has better repeatability while using a smaller amount of gold for film-forming. The HgII detection limit is 0.09 mg/L at a deposition time of 250 s. The repeatability of Ip is very good (n = 20) even at a very low concentration of HgII (5 mg/L, RSD = 2.6%).

https://doi.org/10.26459/hueuni-jns.v128i1C.5324
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