title: Colorimetric determination of 1-(4'-nitrophenyl)-2-aminopropane-1,3-diol with 2,4,6-trinitrobenzenesulfonic acid in the presence of chloramphenicol.
abstract: A colorimetric method based on the interaction between the chloramphenicol degradation product 1-(4'-nitrophenyl)-2-aminopropane-1,3-diol and the 2,4,6-trinitrobenzenesulfonic acid reagent was developed. Analytical solutions were reacted with the reagent at pH 9.1 for 20 min at room temperature, and the resulting color was measured at 340 nm. A linear relationship between absorbance and concentration occurred within the 5--25-micrograms/ml range under the conditions studied. Replicate analyses were in good agreement. An average recovery of 99.4 +/- 0.4% was obtained for the synthetic mixtures.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D002701:Chloramphenicol / Q000031:analogs & derivatives; D003124:Colorimetry; D004340:Drug Contamination; D006863:Hydrogen-Ion Concentration; D008722:Methods; D009578:Nitrobenzenes; D011409:Propylene Glycols / Q000032:analysis*; D013997:Time Factors; D014302:Trinitrobenzenesulfonic Acid
chemical_list: D009578:Nitrobenzenes; D011409:Propylene Glycols; C024061:1-(4'-nitrophenyl)-2-aminopropane-1,3-diol; D002701:Chloramphenicol; D014302:Trinitrobenzenesulfonic Acid