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各位老师,最近我们在做一个缓释片的含量测定,在样品溶液配制的时候发现,溶液中有块状物没有溶解开,这种情况大家都是如何处理的?我们研磨了很长时间,所以不会是研磨的问题,应该是缓释材料的问题,我们缓释片的骨架材料是HPMC。另外我们在USP39质量标准里找到含量测定方法是这样的:
Sample stock solution: Finely powder NLT 10 Tablets. Transfer powder, equivalent to the average Tablet weight, to a homogenization vessel, and add 500 mL of a 10% acetonitrile solution. Alternately, homogenize and allow to soak until the sample is fully homogen- ized. [NOTE—A suggested homogenization sequence is as follows. Homogenize the sample using five pulses, each of 5 s, at about 20,000 rpm, and allow to soak for
Sample solution: Pass a portion of the Sample stock solution through a suitable filter of 0.45-μm pore size,discarding the first 3 mL of filtrate. Transfer 25 mL of the filtrate to a 200-mL volumetric flask, and dilute with water to volume.
请问大家:这里提到的homogenization vessel是什么样的设备,大家有没有推荐的?
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