The spectrophotometric FIA procedures based on classical diphenylcarbazide method for the determination of Cr(VI) and total Cr or Cr(III) were developed by testing KIO₄ as a new oxidation agent. The detection limits for Cr(VI) and Cr(III) were 0.02 and 0.19 mg.l^-1, respectively. Frequency of determinations is 48 and 32 samples in hour, respectively.