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、�/span>

技术参数：

半径距离９�/span>13.3��0.4cm

容器数量９�/span>2x2

振荡频率９�/span>300Osc/min

幅度�?0^o

**负载�?0 lbs

外型尺寸９�/span>20 x 19 x 18

电源�?20V 50Hz

重量�?8 lbs

选配９�/span>

附：二甲基硅�?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 ?L 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.