Temperature-programmed desorbed gas analyzing apparatus
First Claim
1. A temperature-programmed desorbed gas analyzing apparatus comprising:
- a sample chamber in which a sample is disposed;
a heating unit for heating the sample disposed in the sample chamber;
a measuring chamber in which gas desorbed from the sample by heating is introduced;
a pressure-reducing unit for reducing the pressure in the measuring chamber;
a mass spectrometer having a gas detector disposed in the measuring chamber;
an intermediate pressure-reduced chamber provided between the sample chamber and the measuring chamber;
a first orifice through which the intermediate pressure-reduced chamber and the sample chamber intercommunicate with each other;
a second orifice through which the intermediate pressure-reduced chamber and the measuring chamber intercommunicate with each other, desorbed gas occurring in the sample chamber being introduced through the first orifice, the intermediate pressure-reduced chamber and the second orifice into the measuring chamber; and
a pressure adjusting unit for controlling the pressure of the intermediate pressure-reduced chamber so that the pressure of the measuring chamber is fixed.
1 Assignment
0 Petitions
Accused Products
Abstract
A temperature-programmed desorbed gas analyzing apparatus including a sample chamber 1 in which a sample S is disposed, an infrared heating furnace 2 for heating the sample S disposed in the sample chamber 1, a measuring chamber 3 in which gas desorbed from the sample S by heating is introduced, a turbo molecular pump 4 for reducing the pressure in the measuring chamber 3, a mass spectrometer 5 having a gas detection portion 5a disposed in the measuring chamber 3, an intermediate pressure-reduced chamber 6 provided between the sample chamber 1 and the measuring chamber 3, a first orifice 7 which the intermediate pressure-reduced chamber 6 and the sample chamber 1 intercommunicate with each other, and a second orifice 8 through which the intermediate pressure-reduced chamber 6 and the measuring chamber 3 intercommunicate with each other, and the desorbed gas occurring in the sample chamber 1 is introduced through the first orifice 7, the intermediate pressure-reduced chamber 6 and the second orifice 8 into the measuring chamber 3. The pressure in the intermediate pressure-reduced chamber 6 or the measuring chamber 3 is controlled by pressure adjusting unit so as to be fixed.
-
Citations
4 Claims
-
1. A temperature-programmed desorbed gas analyzing apparatus comprising:
-
a sample chamber in which a sample is disposed;
a heating unit for heating the sample disposed in the sample chamber;a measuring chamber in which gas desorbed from the sample by heating is introduced;
a pressure-reducing unit for reducing the pressure in the measuring chamber;a mass spectrometer having a gas detector disposed in the measuring chamber;
an intermediate pressure-reduced chamber provided between the sample chamber and the measuring chamber;a first orifice through which the intermediate pressure-reduced chamber and the sample chamber intercommunicate with each other; a second orifice through which the intermediate pressure-reduced chamber and the measuring chamber intercommunicate with each other, desorbed gas occurring in the sample chamber being introduced through the first orifice, the intermediate pressure-reduced chamber and the second orifice into the measuring chamber; and a pressure adjusting unit for controlling the pressure of the intermediate pressure-reduced chamber so that the pressure of the measuring chamber is fixed. - View Dependent Claims (2, 3, 4)
-
Specification