Water soluble chromium and total chromium not only could reach the discharging standard of Chinese National Standard in this technics,but also acid soluble chromium was able to be eliminated under a definite condition.

The determination of magnesium oxide in magnesiumbase desulfurizing agent and in the surface of deactivation magnesium is studied in this paperTwo method are adopted in the procedure It shows that the content of magnesium oxide correctly can be leached by boiling or by oscillating the potassium bichromate solution and determined by AAS.