Izvorni znanstveni članak
https://doi.org/10.5599/jese.651
Determination of lead(II) and cadmium(II) in water lily stems using a bismuth film electrode
Monthira Somkid
; Analytical Chemistry Division, Department of Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90112, Thailand
Pipat Chooto
orcid.org/0000-0001-8872-7535
; Analytical Chemistry Division, Department of Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90112, Thailand
Sažetak
Mesoporous silica nanoparticles and chitosan were combined with ex-situ bismuth film modified glassy carbon electrode (NanoSiO2–CTS/BiFE) for simultaneous determination of Pb(II) and Cd(II) in HCl/KCl pH 2.2. Differential pulse anodic stripping voltammetry (DPASV) measurements, based on formation of ion-associates between chlorocomplexes and protonated amino groups (–NH3+) of chitosan at the electrode surface, were explored. Under optimum conditions, the linear correlation coefficient was 0.998 for both Pb(II) and Cd(II) after 240 s of deposition time. The limits of detection (LOD) and quantification (LOQ) were 1.0 mg/L and 3.3 mg/L for Pb(II) and 0.5 mg/L and 1.6 mg/L for Cd(II), respectively. The method exhibited satisfactory reproducibility and the results comparable to ICP-OES. Also, DPASV at NanoSiO2–CTS/BiFE was applied successfully in determining Pb(II) and Cd(II) in water lily stems in Thale Noi.
Ključne riječi
Anodic stripping voltammetry; mesoporous silica nanoparticles; chitosan
Hrčak ID:
219923
URI
Datum izdavanja:
6.5.2019.
Posjeta: 1.361 *