Thermometric titration of copper and zinc in copper-based alloys with triethylenetetramine.

Electrometric titration of copper and zinc in biologic material.

C OLORIMETRIC ANALYSIS has been employed extensively in determination of copper and zinc in human serum and other biologic materials. Greenleaf (1) and Callan and Henderson (2) determined copper colorimetrically using dithizone and diethyldithiocarbamate, respectivelv. Zinc was determined colorinietricallv by Fischer and Leopoldi (4) and by Wolf (5), using dithizone. These procedures were evalu...

Electrochemical and Spectroscopic Study of Benzotriazole Films Formed on Copper, Copper-zinc Alloys and Zinc in Chloride Solution

The formation of protective layers on copper, zinc and copper-zinc (Cu-10Zn and Cu-40Zn) alloys at open circuit potential in aerated, near neutral 0.5 M NaCl solution containing benzotriazole (BTA) was studied using potentiodynamic measurements, electrochemical impedance spectroscopy (EIS) and X-ray photoelectron spectroscopy (XPS). The addition of benzotriazole affects the dissolution of the m...

Serum zinc and copper levels in children with febrile convulsion

Febrile convulsions (FC) are the most common neurologic disorder in children 6-60 months of age. Zinc (Zn) and copper (Cu) play role as cofactors in more than 300 enzymatic activities significantly. The aim of this study was to evaluate the relationship serum levels of Zn and Cu with seizure occurrence in febrile children. In this case-control study, 270 children with 6 month to 6 years were ev...

Soldering and brazing of copper and copper alloys

Serum levels of Copper, Zinc and Copper/Zinc Ratio in Patients with Ovarian Cancer

Objective: To investigate the serum concentrations of copper (Cu), zinc (Zn) and copper/zinc ratio (Cu/Zn) in patients with ovarian cancer and benign ovarian lesions. Methodology: The study included 50 patients, with ovarian cancer (malignant group) and 50 patients with benign ovarian lesions (benign group). After overnight fasting, blood samples were collected. The concentrations of Cu and Zn ...