A method of and device for measuring the concentration of thiocarbamide in industrial electrolytes

• Main Authors: GLADYSZ OLIMPIA, ROMANOWICZ PIOTR, SZWANCYBER GRZEGORZ, NOSAL STANISLAW, GARBACZEWSKI JAN, MALACHOWICZ GRZEGORZ, JAGIELLO JAN, LOS PRZEMYSLAW, PLINSKA STANISLAWA, FUGLEWICZ BOGUSLAW, BAS WLODZIMIERZ, ORZECKI STANISLAW, URBANOWICZ ROMAN, PRZYSIEZNY MIROSLAW, WARMUZ MARIAN
• Format: Patent
• Language: English; Polish
• Published: 30.09.2005
• Edition: 7
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

1. The method of measuring thiocarbamide concentration in industrial electrolytes, especially in copper electrolytic refining, by means of cyclical voltametry (CV). It is characterised in that the voltamperometric characteristics of anodal oxidation of thiocarbamide are registered on a gold or platinum ultra-micro-electrode (UME), powered with a direct-current signal with the voltage between 0 and +0.9V, measured with respect to a platinum reference electrode. The voltage value in the indicated range changes in a linear manner at the rate of 0.001 V/s to 1.0 V/s. Then, the maximum value of current intensity of the second oxidation stage for a given voltage change cycle is read and compared to the value of the current intensity of the model characteristic, corresponding to a determined concentration of thiocarbamide in an industrial solution. The model characteristic is prepared experimentally beforehand, by the arrow diagram method and by means of CV. 3. The device for measuring the concentration of thiocarbamide in industrial electrolytes, especially in copper electrolytic refining, is equipped with an indicator electrode and a reference electrode, located inside the Faraday cage. It is characterised in that the gold or platinum ultra-micro-electrode (1) - the indicator electrode - has the diameter of 1-50 μm. The platinum reference electrode (2) has the area of 0.1-0.6 cm2>. Both electrodes (1, 2) are located inside the measurement container (3), surrounded by a water mantle (4). The container (3) is connected through the inlet conduit (6) to the tank (7) of electrolyte (E). The container (3) is also connected to the outlet conduit (8), which allows the [substance] to be introduced into the electrolytic refining system. The electrodes (1, 2) are connected to the potentiometer (11). The controlling input of the latter is connected to the output of the programming device (12), while the measuring output is connected to the registering input of the programming device (12).