The most favorable operating conditions decided through the orthogonal experiment are as follows. Pour 0 6 mL of perchloric acid(3%),1 30 mL of acetylation reagent into the test solution and keep it for 15 min,then add 4 mL of pyridine solution.

• 并通过正交实验确定了最佳测定条件 :在试液中加质量分数为 3%25的高氯酸 0 6mL ,乙酰化试剂 1 30mL ,酰化15min ,加吡啶水溶液 4mL。