Abstract：
:This work describes for first time the use of biochar as electrode modifier in combination with differential pulse adsorptive stripping voltammetric (DPAdSV) techniques for preconcentration and determination of copper (II) ions in spirit drinks samples (Cachaça, Vodka, Gin and Tequila). Using the best set of the experimental conditions a linear response for copper ions in the concentration range of 1.5 × 10(-6) to 3.1 × 10(-5) mol L(-1) with a Limit of Detection (LOD) of 4.0 × 10(-7) mol L(-1). The repeatability of the proposed sensor using the same electrode surface was measured as 3.6% and 6.6% using different electrodes. The effect of foreign species on the voltammetric response was also evaluated. Determination of copper ions content in different samples of spirit drinks samples was also realized adopting inductively coupled plasma optical emission spectroscopy (ICP-OES) and the results achieved are in agreement at a 95% of confidence level.
journal_name
Food Chemjournal_title
Food chemistryauthors
Oliveira PR,Lamy-Mendes AC,Rezende EI,Mangrich AS,Marcolino LH Jr,Bergamini MFdoi
10.1016/j.foodchem.2014.09.023subject
Has Abstractpub_date
2015-03-15 00:00:00pages
426-31eissn
0308-8146issn
1873-7072pii
S0308-8146(14)01390-9journal_volume
171pub_type
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