Determination of nickel and cobalt in refined beet sugar by adsorptive cathodic stripping voltammetry without sample pretreatment – documents

Daniel Sancho, Luis Deba?n *, Isabel Campos, Rafael Pardo, Marisol Vega

Departamento de Qu??mica Anal??tica, Facultad de Ciencias, Universidad de Valladolid, 47005 Valladolid, Spain

Received 7 January 2000; received in revised form and accepted 16 March 2000

Nickel and cobalt have been analysed in refined beet sugar at the mg kgy1 level by adsorptive cathodic stripping voltammetry in

the di?erential-pulse mode (DPCSV) at the hanging mercury drop electrode (HMDE) as their dimethylglyoxime complexes,

M(DMG)2. Sugar cane vs sugar beet Measurements were directly carried out on untreated sugar solutions. Cane sugar meaning The performance of the procedure was compared

with electrothermal atomic absorption spectrometry (ETAAS) applied to digested sugar samples, and showed in general better

accuracy. Sugarcane or sugar cane The procedure was applied to the determination of these toxic elements in refined beet sugar samples, and concentrations

below 50 mg kgy1 nickel and 10 mg kgy1 cobalt were found, which are much lower than the toxic levels of these elements.

Is cane sugar better # 2000

Keywords: Food quality; Sugar; Saccharose; Nickel; Cobalt; Graphite-furnace atomic absorption spectrometry; Adsorptive stripping voltammetry

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0308-8146/00/$ – see front matter # 2000 Elsevier Science Ltd. How to plant sugar cane minecraft All rights reserved.

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