(under the class definition) Processes wherein trace amounts of unspecified materials in steam or inert gases are chemically determined.
(1) Note. This subclass is intended to provide for processes which chemically determine the gross amount of undesired substances present in a sample without regard to the chemical identity of the undesired substance. If the undesired substance is named, classification is not proper herein but should be with the test for the named material.
SEE OR SEARCH CLASS
73, Measuring and Testing,
19.01, for the detection of a hydrocarbon gas in seawater; subclass 23.2 for a prospecting method for hydrocarbons subclasses 61.43+ for detection of oil or hydrocarbons in water and subclasses 152.01+ for bore hole and drilling study.
