Abstract: An electronic water treatment apparatus includes an electronic impulse generator and control box attached to a power source. An impulse chamber includes a cylindrical anode rod inside a tubular cathode and is connected to the impulse generator and control box with a low-voltage cable which is no more than about six feet long. The impulse generator and control box supply about 16 v DC power and 120-180 milliamps to the impulse chamber at between 2300 and 5200 Hertz. The discharge frequency within the impulse chamber automatically varies with the conductivity of the aqueous solution within the impulse chamber. The impulse generator and control box supply power with a waveform that includes about a two microsecond break between each positive and negative pulse to prevent corrosion of the electrodes and create the aragonite form of calcium carbonate instead of the calcite form.

Abstract: The chloride concentration in an acid copper plating bath is determined from the chloride oxidation current measured under controlled hydrodynamic conditions at a noble metal electrode using specific voltammetric parameters. The measurement is made directly on the undiluted plating bath so that the chloride measurement is fast and no waste stream is generated.