Atomic absorption spectrophotometric determination of 4-hydroxy-3-nitrobenzenearsonic acid (roxarsone) in premixes.
Roxarsone (4-hydroxy-3-nitrobenzenearsonic acid) is extracted from the premix with aqueous 1% ammonium carbonate. The extract is filtered, diluted, and analyzed by atomic absorption spectrophotometry, using an air-acetylene flame and an arsenic electrodeless discharge lamp. The instrument response of the sample is compared to that of a standard solution of arsenic trioxide. Recoveries range from 99.7. to 100.4% and coefficients of variation range from 0.35 to 0.63%.
D000821:Animal Feed / Q000032:analysis*; D001152:Arsenicals / Q000032:analysis*; D005503:Food Additives / Q000032:analysis*; D008722:Methods; D012406:Roxarsone / Q000032:analysis*; D013054:Spectrophotometry, Atomic
D001152:Arsenicals; D005503:Food Additives; D012406:Roxarsone