Method for rapidly and qualitatively testing content of hexavalent chromium in ferrite magnetic powder

The invention discloses a rapid qualitative test method for the content of hexavalent chromium in ferrite magnetic powder, which comprises the following steps: boiling by using an alkaline Cr < 6 + > extracting agent and balancing water amount (volume), so that Cr < 6 + > in a sample can be fully and rapidly leached; the sample is compared with a Cr < 6 + > standard liquid tube with known concentration through a colorimetric method, and the Cr < 6 + > content of the sample is qualitatively determined; the samples with different Cr < 6 + > contents can be qualitatively analyzed by taking the Cr < 6 + > standard solutions with different weights or different volumes or preparing the Cr < 6 + > standard solutions with different concentrations through multiple conversion. The detection time is 20-30 min, professional equipment (a spectrophotometer and the like) does not need to be used, and the method has the advantages of being low in detection cost, short in detection time, high in sensitivity and the like, is s