Electrode modified with 1,3-bis (4-butyl-1H-1,2,3-triazol-1-yl)propan-2-ol for electrochemical determination of Cu(II) ions in cabbage cultivated with Bordeaux syrup

Abstract

The modified electrode with 1,3-bis(4-butyl-1H-1,2,3triazol-1-yl)propan-2-ol ligand (CPE/BT) was applied to determinate Cu(II) ions in cabbage cultivated with the use of Bordeaux syrup. The parameters optimization resulted in better analytical signals in B-R buffer solution at pH 5.00, potential of-0.4 V for 900 s on preconcentration, scan rate of 10 mV s-1 and amount of modifier of 5%. Under the electroanalytical method obtained linear behavior in the range of 1.00 x 10-8 to 1.30 x 10-7 mol L-1 , with a correlation coefficient of 0.994. The limit of detection (LOD) and the limit of quantification (LOQ) for determination of copper were with 1.67 x 10-9 mol L-1 and 5.05 x 10-9 mol L-1 , respectively. The electrode was successfully applied in the determination of Cu 2+ on cabbage ("couve") cultivated with Bordeaux syrup and the quantity of copper found was 8.05 µg kg-1 , which is within the standards stipulated by ANVISA.