Problem in the estimation of drugs in biologic tissue recovery of phenol red from the GI tract.
D000818:Animals; D003124:Colorimetry; D004396:Coloring Agents / Q000032:analysis*; D007422:Intestines / Q000032:analysis*; D008297:Male; D010636:Phenols / Q000032:analysis; D051381:Rats; D013053:Spectrophotometry; D013270:Stomach / Q000032:analysis*
D004396:Coloring Agents; D010636:Phenols