Division 3.6 Visualizing agent II:

2,6-dibromo-4-(cMoroimino)cyclohexa-2,5-dienone solution: dissolve 400 mg of 2,6(dibromo-4-(chloroimino)cyclohexa-2,5-dienone in 100 ml of methanol (prepare fresh daily).

Sodium carbonate solution: dissolve 10 g of sodium carbonate in 100 ml of demineralized water.