کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6392097 | 1330436 | 2014 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Use of boron-doped diamond electrode pre-treated cathodically for the determination of trace metals in honey by differential pulse voltammetry Use of boron-doped diamond electrode pre-treated cathodically for the determination of trace metals in honey by differential pulse voltammetry](/preview/png/6392097.png)
- Trace metals in honey has been used as environmental indicator.
- Determination of trace metals in honey using boron-doped diamond electrode.
- The honey samples were also analyzed by Hg-GC electrode and GF AAS.
- This work was carried out on 10 honey samples obtained from local markets in Brazil.
- The use of chemometrics tools allowed predicting models for the metals analysis.
In this work, a methodology for the determination of Cu(II), Pb(II), Cd(II) and Zn(II) in honey by differential pulse anodic stripping voltammetry (DPASV) on a nano crystalline boron-doped diamond electrode (BDD) is proposed. A 33 Box-Behnken Design, 32 Factorial Design and Principal Components Analysis (PCA) were performed to optimise the electrochemical conditions. According to the response surfaces obtained, it was stipulated for Zn analysis a pH of 4, Ed of â1.50 V and td of 240 s. For simultaneous analysis of Cu, Pb and Cd a pH of 1, Ed of â0.95 V and td of 240 s was used. Detection limits of 0.37, 0.40, 1.28 and 0.16 μg Lâ1 were found for Cu, Pb, Cd and Zn, respectively. The analyte concentration ranged between 0.242 and 1.38 mg Lâ1 for Cu, 0.129 and 0.918 mg Lâ1 for Pb and 0.819 and 2.492 mg Lâ1 for Zn, while no significant concentrations were found during Cd analyses. The honey samples were also analysed by Hg-coated glassy carbon electrode and graphite furnace atomic absorption spectrometry (GF AAS) through non-parametric ANOVA and no evidence of significant differences among the results was observed within a 95% confidence interval.
Journal: Food Control - Volume 36, Issue 1, February 2014, Pages 42-48