Froth flotation apparatus and method
Method of preparing acrylic ion-transfer membranes Patent #: 4434249
ApplicationNo. 06/729209 filed on 05/01/1985
US Classes:204/403.06, With semipermeable membrane204/212, Rotary204/277, Gas feeding204/403.1, Enzyme included in apparatus204/403.14, Enzyme included in apparatus204/403.15, Electrode containing free carbon435/287.1, Including measuring or testing435/289.1, Bioreactor435/817ENZYME OR MICROBE ELECTRODE
ExaminersPrimary: Kaplan, G. L.
Attorney, Agent or Firm
International ClassC12M 1/34 (20060101)
AbstractAn electrochemical system for determining the concentration of a bacteria or other enzymatic agents in a liquid sample (14). The system includes mounting means (20) for mounting an electrode assembly (16), and drive means for rotating the electrode assembly. The electrode assembly comprises a shaft (22) having a longitudinal axis and a longitudinally extending interior passage (40), an electrode (24) mounted at the lower end of the shaft, and sparging means (26) extending laterally from the lower end of the shaft. The sparging means is in communication with passage (40) through openings (50). The electrode and sparging means are mounted such that they are immersed in the sample when the shaft is mounted by the mounting means. The electrode assembly further comprises conductor means (44, 46) for electrically connecting the electrode to the electrochemical system. The electrode assembly is rotated during measurement of the concentration of the enzymatic agent. Prior to such measurement, dissolved oxygen may be rapidly removed from the sample by rotating the electrode assembly and introducing an inert gas into the passage, such that the inert gas passes from the rotating sparging means into the sample.