手腕式振荡器(二甲基硅油消泡性能测试专用)

此款手腕式振荡器已改进用于满足现行美国药典（USP）中二甲基硅油消泡性能测试。

技术参数：
        半径距离：13.3±0.4cm
        容器数量：2 x 2
        振荡频率：300Osc/min
        幅度：10^o
        最大负载：10 lbs
        外型尺寸：20 x 19 x 18

      电源：220V 50Hz

      重量：68 lbs

    选配：

附：二甲基硅油(Simethicone)消泡性能美国药典测试方法

Defoaming Activity
Foaming solution: 10 mg/mL of octoxynol 9 in water
Sample solution: 4 mg/mL of Simethicone in tertiary butyl alcohol. Shake vigorously.[Note—Warm slightly, if necessary, to dissolve. ]
Analysis
[Note—For each test, use a clean, unused, 250-mL glass jar. ]
Add, dropwise, 500 µL of the Sample solution to a clean, unused, cylindrical 250-mL glass jar, fitted with a 50-mm cap, containing 100 mL of the Foaming solution. Cap the jar, and clamp it in an upright position on a wrist-action shaker. Using a radius of 13.3±0.4 cm (measured from the center of the shaft to the center of the bottle), shake for 10 s through an arc of 10 at a frequency of 300 Osc/min; 30 strokes/min. Record the time required for the foam to collapse. The time, in s, for foam collapse is determined at the instant the first portion of foam-free liquid surface appears, measured from the end of the shaking period.
Acceptance criteria: The defoaming activity time does not exceed 15 s.