专利名称：DETECTING GAS CONSTITENT发明人：K. LIECHNITZ申请号：AU4224978申请日：19781206公开号：AU519019B2公开日：19811105
摘要：A device for measuring gases and aerosols with a detector tube, comprises, aduct or test tube for the passage of a test gas therethrough which includes a forelayer inthe duct through which the test gas is passed, and which has a substance which will reactwith the test gas to form a new gas substance. The gas-permeable forelayer
advantageously acts as a filter for the aerosol and comprises a substrate, such as a silicagel or a glass fiber, which is impregnated with a material, such as zinc dust and arsenictrioxide which is saturated with water. The aerosol which contains a sulfuric acid in the gaswill react after deposit in the forelayer with the zinc forming a nascent hydrogen whichreduces the arsenic trioxide immediately to arsenic hydride. The test tube also containsan indicating layer with a material which is known for producing an indication of the newlyformed gaseous substance.
申请人：DRAGERWERK AKTIENGESELLSCHAFT
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