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关于色谱法: 校正因子在0.2-5之间可以使用校正因子的出处:
一. CDE老师;--HPLC法校正因子研究中的几个问题一文中表明:
根据杂质研究相关技术指导原则,为确保杂质测定结果的准确可靠,
一般情况下,校正因子在0.9~1.1时可不予校正,直接采用不加校正因子的自身对照法定量;
超出该范围,如采用主成分自身对照法的定量方式,须用校正因子进行校正,,即“加校正因子的主成分自身对照法”以保证杂质定量的准确性;
---如校正因子在0.2~5.0范围以外时,表明杂质与主成分的UV吸收相差过大,校正因子的作用会受到显著影响,此时应改变检测波长等检测条件,使校正因子位于上述范围内,或使用结构或UV吸收与该杂
质接近的另一标准物质为参照物质(如对照品易于获得、标准已采用对照品外标法定量的另一特定杂质),重新确立校正因子;
如校正因子仍无法调节至适当范围,需考虑采用杂质对照品外标法等适当的杂质方式定量。
二. THE ROLE OF RELATIVE RESPONSE FACTOR IN RELATED SUBSTANCES METHOD DEVELOPMENT BY HIGH PERFORMANCE LIQUID CHROMATOGRAPHY (HPLC)2010
一文中提到:
British Pharmacopoeia (BP)3 states that Response Factors of less than 0.2 or more than 5 are not used.
If the difference between the response of an impurity and that of the substance being examined isoutside these limits, a different method of determination, such as a different detection wavelength () or a
different method of visualization is used.
参考文献British Pharmacopoeia Control of Impurities, A530 Supplementary Chapter I A, (2008).
三. EDQM 的Technical guide for the ELABORATION OF MONOGRAPHS:2015一文中提到
以及Impurity Control in theEuropean Pharmacopoeia r Ulrich RoseEDQM Webinar July 2021
Note: when correction factorsare > 5, the quantification shouldbeperformedusingimpuritiesas externalstandards (Ph. Eur. TechnicalGuide)
It is recommended not to apply correction factors > 5 for specified impurities, but to use external standards in these cases where possible.
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