Herbal Medicines: Application of a Sequential Voltammetric Procedure to the Determination of Mercury, Copper, Lead, Cadmium and Zinc at Trace Level
Küçük Resim Yok
Tarih
2018
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
BENTHAM SCIENCE PUBL LTD
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Background: The work describes the voltammetric determination of mercury(II), copper(II), lead(II), cadmium(II), zinc(II) by square wave anodic stripping voltammetry (SWASV) in herbal medicines. Methods: The voltammetric measurements were carried out using a conventional three electrode cell and two working electrodes, a gold electrode (GE) and a stationary hanging mercury drop electrode (HMDE). The analytical procedure was verified on the standard reference materials Spinach Leaves NIST-SRM 1570a, Tomato Leaves NIST-SRM 1573a and Apple Leaves NIST-SRM 1515. For all the elements, precision as repeatability, expressed as relative standard deviation (s(r)) was of the order of 4-6 %, while authenticity, expressed as relative error (e) was generally of the order of 5-8 %. Once set up on the standard reference materials, the analytical procedure was applied to commercial herbal medicine samples, and a critical comparison with spectroscopic measurements was done to evaluate the analytical performance. Results and Conclusion: Results are also processed by Principal Components Analysis (PCA), which provides very easy-to-read graphic outputs evidencing the influence of herbs prewashing on the content of risky elements. The correlation matrix is also obtained, allowing to study correlation between elements or methods.
Açıklama
Anahtar Kelimeler
Herbal medicines, toxic metals, voltammetry, interferences, spectroscopy, PCA
Kaynak
LETTERS IN DRUG DESIGN & DISCOVERY
WoS Q Değeri
Q4
Scopus Q Değeri
Q3
Cilt
15
Sayı
3
