The STUDIA UNIVERSITATIS BABE┼×-BOLYAI issue article summary

The summary of the selected article appears at the bottom of the page. In order to get back to the contents of the issue this article belongs to you have to access the link from the title. In order to see all the articles of the archive which have as author/co-author one of the authors mentioned below, you have to access the link from the author's name.

 
       
         
    STUDIA CHEMIA - Issue no. 3 / 2015  
         
  Article:   DETERMINATION OF COPPER IN ORANGE JUICE BY VOLTAMMETRIC TECHNIQUE: A COMPARATIVE STUDY OF SAMPLE PREPARATION METHODS.

Authors:  .
 
       
         
  Abstract:   In the present work, carbon paste electrodes (CPE) modified with conducting polymers (1,8-diaminonaphthalene, 1,8-DAN) combined with rotating disk electrode (RDE) was applied to determine copper in orange juice samples. Copper (II) was preconcentrated at open circuit potential on the modified electrode. Then, the preconcentrated metals were oxidized by scanning the potential of the electrode from -0.4 to 0 V using differential pulse anodic stripping voltammetry (DPASV). Samples were analyzed with and without previous treatment. The current peak was high in orange juice sample digested with wet ashing and dry ashing procedures compared to those in sample without pretreatment. The wet ashing procedure was chosen for the digestion of orange samples because it required shorter time. The results obtained were validated by inductively coupled plasma atomic emission spectroscopy (ICP-AES).

Keywords: carbon paste electrode, 1,8-diaminonaphtalene, differential pulse anodic stripping voltammetry, rotating disk electrode, orange juice
 
         
     
         
         
      Back to previous page