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[目的]pH值是农药检测中的一项重要理化性能指标。讨论了农药pH值测定时蒸馏水的pH值、仪器、温度等因素对测定值的影响。[结果]不同pH值的蒸馏水对农药pH值测定是主要的影响因素,而不同的仪器、温度等对农药pH值测定则基本没影响。[结论]提出了农药pH值测定时对蒸馏水的要求和测定时的注意事项。
[Objective] The pH value is an important physicochemical property index in pesticide testing. The influence of pH value, instrument, temperature and other factors on the determination of pesticide pH value was discussed. [Result] Distilled water with different pH value was the main influencing factor to the determination of pesticide pH value. However, different instruments and temperature did not affect the pH value of pesticide. [Conclusion] The requirements of distilled water and determination of pesticide pH value were put forward.