| 摘要 |
The invention provides an attenuated total reflection ATR probe 10, comprising an elongate body 15 with a head 100 at one end, which probe is adapted for use with hot sample fluids and has particular benefits when utilising infra-red radiation in the mid-infra-red region ("MIR") of the spectrum; generally accepted as extending over the wavelength range from 3-10žm. The ATR probe 10 comprises hollow waveguides 60, 70 disposed in a region of the body exposed to relatively high temperatures, and solid fibres 20, 30 disposed in a region of the body exposed to relatively low temperatures. The waveguides and the fibres are arranged to sequentially convey infra-red radiation to and/or from the probe head. The hollow waveguide preferably comprises a light pipe. Also provided is a diamond ATR head (200, Fig. 3) constructed and configured to be utilised at high temperatures, and which enhances the chemical resistance of the ATR probe as a whole to potentially corrosive materials comprised in the sample fluids. |
