| 摘要 |
PURPOSE:To promote efficiency and to improve accuracy by packing an air permeable reducing catalyzer of titanium or platinum series, etc. in a reducing reaction furnace and passing a sample gas of 700-1,050 deg.C therethrough to reduce phosphor or sulfur to hydride. CONSTITUTION:The sample gas from a reducing reaction furnace 2 is passed through a cooler 4 to remove the moisture, and is circulated to the furnace 2 through dryers 6, 7 by a changing-over cock 5. In this case, gaseous hydrogen is introduced to a circulation passage 3 from a cylinder 9 to maintain the condition unber reducing atmosphere. Next, if phosphor or sulfur in the gaseous sample of 700-1,050 deg.C is changed to uniform hydride, a fixed quantity of the gaseous sample is taken out from the passage 3 and sent to a measuring system 10 such as a flame photometric detector. Whole phosphor or surfur component in the gaseous sample is changed to uniform hydride such as PH3 or H2S, and is fed to a column to separate and detect it. Thereby, the analysis is made efficient and the accuracy can be improved.
|
