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为研究H_2O_2对酸雨形成的影响,我们发展了分光光度法测定雨水中痕量H_2O_2的新方法。该法基于Ti(Ⅳ)-5-Br-PADAP-H_2O_2三元显色体系的形成,摩尔吸光系数为7.3×10~4L.mol~(-1).cm~(-1),0.2—10μMH_2O_2范围内服从比尔定律。该方法灵敏、简便、重现性好。测定雨水获得了满意的结果。
To study the effect of H 2 O 2 on the formation of acid rain, we developed a new spectrophotometric method for the determination of trace H 2 O 2 in rainwater. The method was based on the ternary chromogenic system of Ti (Ⅳ) -5-Br-PADAP-H 2 O 2 with a molar absorption coefficient of 7.3 × 10 4 L · mol -1 (cm -1) and 0.2-10 μM H 2 O 2 Be obey Bill’s law within the scope. The method is sensitive, simple and reproducible. Determination of rainfall obtained satisfactory results.