The invention discloses a DGT-based method for synchronously measuring eight kinds of oxidized anions. The oxidized anions include P (V), As (V), Cr (VI), Mo (VI), Sb (V), Se (VI), V (V) and W (VI). The method includes: on the basis of thin film
diffusion gradient principles, adopting a
zirconium dioxide
polyacrylamide gel thin film (Zr-
oxide film) as a fixing film, and assembling the fixing film, a
diffusion film and an
osmosis film into a DGT device; adopting a mild
mixed solution 0.2M NaOH-0.5M H2O2 to further elute the anions accumulated on the fixing film for 3-5h; measuring accumulation amounts of the oxidized anions in the fixing film; calculating according to Fick first
diffusion laws to obtain concentration of the oxidized ions. The Zr-
oxide film is used for synchronously measuring the oxidized anions and has the characteristics of high DGT capacity and high
interference resistance, and type of DGT measuring and number of synchronous measuring are increased; by adopting an extraction method, interference on
phosphor measuring caused by too high H2O2 concentration of existing eluents,
elution efficiency can be improved remarkably,
elution time can be shortened,
detection limit of DGT measuring of anions can be lowered, and analysis efficiency and accuracy are improved greatly.