Patent ID: 6212253
Filing Date: 2001-04-03
Classification: G01N

Abstract:
Apparatus for the investigation of the reactants involved in a reaction between a gas and a solid by means of X-ray absorption spectroscopy, comprising a measuring chamber (2) witha sample holder (23) for holding a sample (24) of the solid,means for creating an atmosphere of the gas in the measuring chamber at selectable pressure,a window (20) for the entry of X-rays for the irradiation of the sample (24), anda collector arrangement (21, 22) arranged spaced from the sample holder (23) for the collection of electrons released in the measuring chamber (2),wherein the collector arrangement comprises two collector electrodes (21 and 22) which are arranged spaced one following the other lengthwise along the X-ray path between the window (20) and the sample holder (23),and wherein each collector electrode (21, 22) and the sample holder (23) have respective connecting means (31, 32, 33) for the connection of each to a preselected potential and for the separate measurement of the currents (I.sub.1, I.sub.2, I.sub.3) flowing through these connections.