scholarly journals Analysis of Cadmium and Lead in honey: direct-determination by Graphite Furnace Atomic Absorption Spectrometry

ACTA IMEKO ◽  
2016 ◽  
Vol 5 (1) ◽  
pp. 10 ◽  
Author(s):  
Andrea Colabucci ◽  
Anna Chiara Turco ◽  
Maria Ciprotti ◽  
Marco Di Gregorio ◽  
Angela Sorbo ◽  
...  
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Graphite Furnace ◽  
Low Cost ◽  
Direct Determination ◽  
Absorption Spectrometry ◽  
Time Saving ◽  
Microwave Sample Preparation ◽  
Network Analyses ◽  
Graphite Furnace Atomic Absorption

<p>One of the emerging issues regarding the analysis of inorganic contaminants in food is the determination of Cadmium (Cd) and Lead (Pb) in honey. In fact, this kind of analysis is foreseen in most of the National Residue Control Plans (NRCPs) that European Union Member States (EU MSs) have to perform according to Directive 96/23.</p><p>With the aim to provide technical support to the EU National Reference Laboratories (NRLs), an easy-to-use method on direct determination (DD) of Cd and Pb in honey by graphite furnace atomic absorption spectrometry (GF-AAS) after dissolution in an aqueous mixture of 2.5 % HNO<sub>3</sub> (v/v) and 12.5 % H<sub>2</sub>O<sub>2</sub> (v/v) was in-house validated and distributed to the NRLs network. Analyses were carried out on a batch prepared for the feasibility study of the EURL-CEFAO 19<sup>th</sup> PT on honey. The validation levels (20 and 100 µg/kg for Cd and Pb, respectively) were chosen similar to those that would have been proposed for the PT.</p><p>The method proved its efficacy in terms of analytical performance; it appears to be low cost and time saving compared to a microwave sample preparation. In addition, it also decreases the environmental impact, being the amount of acid and reagents considerably reduced.  </p>

scholarly journals Determination of Lead in Croatian Wines by Graphite Furnace Atomic Absorption Spectrometry

2011 ◽  
Vol 62 (1) ◽  
pp. 25-31 ◽  
Author(s):  
Blanka Tariba ◽  
Alica Pizent ◽  
Zorana Kljaković-Gašpić
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Graphite Furnace ◽  
Accurate Determination ◽  
Direct Determination ◽  
Absorption Spectrometry ◽  
White Wine ◽  
Matrix Modifier ◽  
Graphite Furnace Atomic Absorption

Determination of Lead in Croatian Wines by Graphite Furnace Atomic Absorption SpectrometryA method has been developed for direct determination of lead in wine by graphite furnace atomic absorption spectrometry (GFAAS) with Zeeman-effect background correction. The thermal behaviour of Pb during pyrolysis and atomisation stages was investigated without matrix modifier and in the presence of Pd(NO3)2, Pd(NO3)2+ Mg(NO3)2× 6H2O, and NH4H2PO4+ Mg(NO3)2× 6H2O as matrix modifiers. A simple 1:1 dilution of wine samples with Pd(NO3)2as a matrix modifier proved optimal for accurate determination of Pb in wine. Mean recoveries were 106 % for red and 114 % for white wine, and the detection limit was 3 μg L-1. Within-run precision of measurements for red and white wine was 2.1 % and 1.8 %, respectively. The proposed method was applied for analysis of 23 Croatian wines. Median Pb concentrations were 33 μg L-1, range (16 to 49) μg L-1in commercially available wines and 46 μg L-1, range (14 to 559) μg L-1in home-made wines. There were no statistically significant differences (P<0.05) in Pb concentration between commercial and home-made wines or between red and white wines.

Sign in / Sign up

Export Citation Format

Share Document