Alkaloids , if present in the solution of sample , will react with Dragendorff 's reagent and produce an orange or orange red precipitate .
Dragendorff 's reagent is a color reagent to detect alkaloids in a test sample .
Alkaloids , if present in the solution of sample , will react with Dragendorff 's color reagent and produce an orange or orange red precipitate .
Dragendorff 's reagent is a color reagent to detect alkaloids in a test sample .