The chlorpromazine ELISA is used for the quantitative analysis of several promazines (chlorpromazine, acepromazine , and propionyl promazine) in cattle urine, milk, liver and kidney. 

The kit uses a polyclonal rabbit antibody which shows the following cross-reactivities: chlorpromazine (100%), propionyl promazine (130%), acepromazine (110%), promazine (50%), chlorprothixene (20%), fluphenazine (<0.01%) and xylazine (<0.01%).