Determination of trace metal ions in common salt by stripping voltammetry.
Sensitive voltammetric methods using cathodic and anodic differential pulse stripping techniques were applied for determination of trace ions cadmium(II), cobalt(II), copper(II), lead(II), manganese(II), nickel(II), and zinc(II), which are usually found in different grades of common salt as contaminants. The optimal conditions, i.e., deposition time, preconcentration potential, supporting electrolyte, and ionic strength, were investigated for each metal ion. Concentration of the metal ion was determined by the standard addition method. Metal content varied according to the quality of the table salt.
Ali
A M
AM
Assiut University, Faculty of Science, Chemistry Department, Egypt.
D002104:Cadmium / Q000032:analysis; D003035:Cobalt / Q000032:analysis; D003300:Copper / Q000032:analysis; D005506:Food Contamination; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents; D007854:Lead / Q000032:analysis; D008345:Manganese / Q000032:analysis; D008670:Metals / Q000032:analysis*; D009532:Nickel / Q000032:analysis; D011048:Polarography / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012965:Sodium Chloride / Q000032:analysis*; D015032:Zinc / Q000032:analysis
D007202:Indicators and Reagents; D008670:Metals; D002104:Cadmium; D007854:Lead; D003035:Cobalt; D008345:Manganese; D012965:Sodium Chloride; D003300:Copper; D009532:Nickel; D015032:Zinc