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:10o 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 ActivityFoaming solution: 10 mg/mL of octoxynol 9 in waterSample solution: 4 mg/mL of Simethicone in tertiary butyl alcohol. Shake vigorously.[Note&mdash Warm slightly, if necessary, to dissolve. ]Analysis[Note&mdash For each test, use a clean, unused, 250-mL glass jar. ]Add, dropwise, 500 µ 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.
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