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此款手腕式振蕩器已改進用于滿足現(xiàn)行美國藥典（USP）中二甲基硅油消泡性能測試。

技術參數(shù)：

半徑距離：13.3±0.4cm

容器數(shù)量：2 x 2

振蕩頻率：300Osc/min

幅度：10^o

**負載：10 lbs

外型尺寸：20 x 19 x 18

電源：220V 50Hz

重量：68 lbs

選配：

附：二甲基硅油(Simethicone)消泡性能美國藥典測試方法

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.