Appeal No. 95-0339
Application 07/881,941
stream remain in non-gaseous form, an attenuated total
reflectance plate which has an electromagnetic radiation inlet
and outlet and which has an exterior surface, on which the non-
gaseous contaminants deposit, located in the measurement zone,
a means for introducing into the inlet electromagnetic radiation
which remains within the plate but interacts with the contami-
nants present on the plate to produce altered electromagnetic
radiation which exits the plate through the outlet, and means
for detecting the altered electromagnetic radiation at the outlet
to provide real-time detection of the contaminants in the super-
critical fluid.
The method includes the steps of removing a sample stream
from a processing vessel which contains a supercritical fluid,
introducing the sample stream into a contaminant measurement
zone, maintaining the pressure in the measurement zone at or
below that required to convert the sample stream into a gas
wherein contaminants in the sample stream remain in non-gaseous
form, and using an attenuated total reflectance plate to detect
the presence of the non-gaseous contaminants deposited on the
exterior surface of the plate, thereby providing real-time
detection of the contaminants present in the supercritical fluid.
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