Determination of traces of copper and zinc in honeys by the solid phase extraction pre-concentration followed by the flame atomic absorption spectrometry detection

Abstract

A simple and fast solid phase extraction procedure was developed to pre-concentrate traces of Cu and Zn prior to their determination in honey samples by flame atomic absorption spectrometry. The sample preparation included dissolution of honey samples and the passage (at 20 ml/min) of resulting 10 % m/v solutions (100 ml) through Dowex 50W × 8-400 resin beds in order to quantitatively retain Cu and Zn and separate them from the glucose and fructose matrix. Enriched Cu and Zn traces were recovered with 5.0 ml of a 3.0 mol/l HCl solution and quantified by flame atomic absorption spectrometry. The procedure proposed was used to analyze sixty nine commercially available and freshly ripened honey samples coming from the Lower Silesia region (Poland). It enabled to measure Cu and Zn within the range of 0.01–1.42 and 0.03–15.38 μg/g, respectively, with precision better than 4 %. Accuracy, assessed on the basis of the recovery test and the comparison of results with those obtained using wet digestion and inductively coupled plasma optical emission spectrometry, was ranged from −4 % to +6 %. Detection limits of Cu and Zn achieved with this method were 5 and 7 ng/g, respectively.

Effect of honey supplementation with bee products on quality parameters and mineral composition

“…Honeys with beebread were characterized by more than five times higher magnesium content than the natural multiflower honeys. The microelement contents determined in the multiflower honeys (Table 3) were at the levels similar to these reported in the literature (Chakir et al 2011, Pohl and Sergiel 2010, Stecka et al, 2014. Slightly higher iron and zinc contents in multiflower honeys were found by Perna et al, (2011).…”

Determination of Heavy Metals and Trace Element Levels in Honey Samples From Different Regions of Iraq and Compared with Other Kind

“…42 Poland (25) <0.073 <0.005 <0.015-0.389 (26) (29) 0.00-0.642 (36) 0.015-0.315 0.019-0.058 Iran (37) 0.04 (39) 115.17-332. 33 - (45) 16.6-57.9 0.09-0.34 Spanish (46) 5.3 38 0.62 India (37) 9.99 0.0008 Helianthus annuus L. and Salix sp (38) ---------------3246-5421.9 65.1-5421.…”

Antimicrobial Activity of Brazilian Stingless Bee Products

“…As próprias abelhas podem transportar contaminantes do ambiente para colmeia e alterar a qualidade dos seus produtos, sendo estes utilizados como indicadores de contaminação (PORRINI et al, 2003;STECKA et al, 2014). Deste modo, a avaliação da concentração de metais no corpo da abelha e em seus produtos tem sido objeto de muitos estudos a fim de monitorar a qualidade ambiental de determinada região, além de servir de alerta para a população e poder público (SADEGHI et al, 2013;STEEN et al, 2016;ZARIĆ et al, 2016).…”