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catwithdog

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koalaone: ½ð±Ò+1 2012-11-13 07:54:07
My experience as your reference:
1.        ÆøÏà²â²ÐÁôÈܼÁµÄ»ØÊÕÂÊ: 80%-120%.
2.        Ô­ÁϲÐÁôÈܼÁµÄ·½·¨Ñ§ÑéÖ¤£¬µ«²âµÃµÄ»ØÊÕÂʱȽϸß: since you are working on Ô­ÁϲÐÁôÈܼÁ, you cannot add your  reference standard to placebo to measure your recovery. You only can use  Ô­ÁÏ +  80%, 100%, 120% working standard solution (100% working standard solution is ICH limit level) to calculate recovery%. To troubleshooting »ØÊÕÂʱȽϸß
1)        When you measure your sample(Ô­ÁÏ), you may measure your sample n=3 or 5 to get mean value.
2)        Prepare sample in a fast or correct way (ÎÒ100mg¶¨Èݵ½1ml, this is not normal way to do, the volume is too low that will be difficult to manage sample evaporation) to avoid sample evaporation.
3)        Sample + matrix interaction may cause this issue too. You can try different solvent (matrix) to dissolve your sample.
4)        If still cannot get right recovery%, you may try internal standard or external standard method.
11Â¥2012-11-13 03:48:41
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koalaone

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ÒýÓûØÌû:
9Â¥: Originally posted by asz_yy at 2012-11-12 15:52:47
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