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Determination of zinc, cadmium, lead and copper in pellets and pulp of sugar beet
Author(s) -
Sancho Daniel,
Deban Luis,
Pardo Rafael,
Valladolid David
Publication year - 2005
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2046
Subject(s) - cadmium , chemistry , zinc , pellets , copper , mercury (programming language) , atomic absorption spectroscopy , pulp (tooth) , anodic stripping voltammetry , sugar , hanging mercury drop electrode , metallurgy , voltammetry , materials science , electrode , food science , electrochemistry , medicine , physics , organic chemistry , pathology , quantum mechanics , computer science , composite material , programming language
Pulp is a residual product of the sugar industry resulting from the total extraction of sugar contained in the root of sugar beet and is normally used in the form of pulp or pellets as food in the cattle industry. The objective of this work was the simultaneous determination of zinc, cadmium, lead and copper in pellets and dried pulp. For this we have developed a method of analysis using anodic stripping voltammetry in the differential pulse mode (DPASV) at a hanging mercury drop electrode (HMDE) and compared the results with those obtained by means of electrothermal atomic absorption spectrometry (ETAAS). We conclude that DPASV can be used as an alternative method to ETAAS to determine low concentrations of Zn, Cd, Cu and Pb in such samples, having the advantage of allowing the determination of all four metals simultaneously. From the analysis of real samples it can be concluded that Zn is present in the highest concentration, ranging from 3 to 30 mg kg −1 , while Cd, Pb and Cu concentrations were always lower than 1, 8 and 8 mg kg −1 respectively. Copyright © 2005 Society of Chemical Industry