Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Wolfgang Liehmann

Norbert Eisenreich

Gunther Hambitzer

Hans-Peter Kugler

Bernhard Beurer

A method is proposed for the contiuous determination of gaseous oxidation products from industrial process, drinking and/or waste water, particularly for determining the TOC value, at least the organically bound carbon contained in a test solution to be investigated being oxidatively transformed and the gaseous oxidation products are supplied to a measuring unit, where at least the organically bound carbon is detected, the test solution being continuously pumped into a microreactor, where it is heated to a predetermined temperature and the organic compounds in the test solution are continuously oxidatively transformed under a temperature and pressure increased in a defined manner. An apparatus for the continuous determination of gaseous oxidation products from industrial process, drinking and waste water, particularly for determining the TOC value, having an oxidation unit and a following measuring unit has a terminally open heatable microreactor as the oxidation unit, upstream of which is provided a high pressure pump for the continuous supply of the test solution.

Method and apparatus for the continuous determination of gaseous

A method is disclosed for measuring the rate and/or extent of movement of oscillatory element positioned on an oscillating system by passing a reference beam towards a reference detector over a reference edge. The reference edge is fixed relative to the element. The measurement beam is directed towards the measurement detector over a measurement edge of a surface adapted to move together with the element relative to the reference edge. The movement of the measurement edge cuts the measurement beam as it moves into the path of the measurement beam. The rate and/or extent of movement of the element relative to the reference edge is determined by comparing the illumination received by each of the detectors. Apparatus is also disclosed for measuring the rate and/or extent of movement of an oscillatory element positioned on an oscillating system including a measurement edge adapted to move together with the element. A reference edge is maintained stationary relative to the measurement edge. A device is provided for generating measurement and reference beams directed towards each of the measurement and reference edges whereby at least the measurement beam is cut by the measurement edge upon movement of the measurement edge relative to the reference edge. Detectors are provided which are adapted to measure the amount of illumination cut by the measurement and reference edges and to generate a corresponding signal.

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Walzbachtal, Germany

Wolfgang Liehmann