Surface active agent plays a part in increasing sensitivity. Under the determination, adding 2mL gum arabic of 0.5%, the linear equation is c = -1.074 + 3.557A.

• 表面活性剂具有增敏作用 ,在测定条件下 ,加入 0 5%25的阿拉伯树胶 2mL ,其线形回归方程为c =- 1 0 74 +3 5 5 7A(mg/L)。