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Standard solutions
Place 0.30 g of methanol and 0.50 g of tert-butanol into 100 mL volumetric flask,
dissolve in IS, add IS up to the mark and mix. 5 mL of this solution transfer into 25 mL
volumetric flask, dilute with IS up to the mark and mix (standard solution). Place 0.5 mL of
standard solution and 4.5 mL water in headspace vial, seal immediately using a crimp cap
(WS solution). Concentration of methanol and tert-butanol in WS solution was 3000 ppm and
5000 ppm with respect to sample respectively.
Prepare Standard solution in duplicate (standard solution No. 1 and No. 2). From
standard solution No. 1 prepare one WS solution and from standard solution No. 2 prepare
three-six WS solutions for system suitability test.
Sample solutions
Weight 0.100 g of Bortezomib 3.5 mg powder for solution for injection into headspace
vial, dissolve in 0.5 mL of IS solution and 4.5 mL of water, seal immediately using a crimp
cap. Prepare two replicate sample solutions (sample solution No.1 and No.2).
溶液配制 内标溶液(IS):取2.5ml丁醇转移至1000ml容量瓶中,用DMF溶解然后稀释至刻度。 空白溶液:取0.5ml DMF和4.5ml水至顶空进样瓶中,使用瓶盖快速密封。 对照溶液:取0.5ml内标溶液(IS)和4.5ml水至顶空进样瓶中,使用瓶盖快速密封。 标准溶液:取0.30g甲醇和0.50g叔丁醇转移至100ml容量瓶内,用IS溶液溶解然后稀释至刻度并混合均匀。将0.5mL标准溶液和4.5mL水放入顶空小瓶中,立即使用压曲盖(WS溶液)密封。 WS溶液:取0.5ml标准溶液和4.5ml水转移至顶空进样瓶中,使用瓶盖快速密封。在WS溶液中,甲醇和叔丁醇相对于样品的浓度分别为3000ppm和5000ppm。 配制2份标准溶液,即标准溶液1和标准溶液2。用标准溶液1配制一份WS溶液,标准溶液2配制3-6WS溶液用于系统适用性试验。 样品溶液:称量0.100g供试品,将供试品加入顶空进样瓶中,用0.5ml IS溶液和4.5ml水溶解,使用瓶盖快速密封。制备两份样品溶液,即样品溶液1和样品溶液2.
英文原文和翻译之后的,这里的3000ppm和5000ppm是怎么算出来?相对于样品是什么意思?不明白谁能解释一下,谢谢各位!
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