This is the generic class for:
A. Processes which involve a chemical reaction for determiningqualitatively or quantitatively the presence of a chemical element,compound or complex in a composition or a chemical compound, oran element or radical in a compound.
B. Process for analysis which involve an in vitro antigen-antibody,immunological or protein binding interaction other than those involvinga living antigen, or enzyme label.
C. Processes of analysis or study of the chemical propertiesof a sample; the physiological effect of a sample; or chemical determinationof a physical property of a sample.
D. Compositions and their mere methods of use of thermoparticulatingcompositions.
E. Chemical test standards for A, B, and C.
F. Analytical compositions for A, B or C subject to the caveatlin Lines With Other Classes, Other Search Notes, "A.Class 252 Compositions Search," below.
G. Combinations of tests or measurements with methods ofregulating a chemical reaction not otherwise provided for in a chemicalsynthesis class or otherwise.
(1)Note. For an elaboration of the distinction between subclasses1-146 and subclasses 147-181 which provide for methods of examiningthe results of a significant chemical interaction see Lines WithOther Classes, "Classification Guidelines For This Class," below.