Doubts regarding IS variation, ISR failure & SEL/SPE Acceptance criteria [Regulatives / Guidelines]

posted by Rams69  – Madruai, Tamilnadu, India, 2021-05-12 08:57 (1020 d 09:36 ago) – Posting: # 22340
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Dear All,


I have few doubts regarding the following,

1) Why we are fixing IS variation range ±50% from the average IS response of accepted CCs &
QCs. (while using a dutrated IS why we not keeping ±15% or ±20% or some other range).
2) If in one project ISR failure observed frequently/continuesly means what will go to next
actions and please give some exaples with clarification for the reasons for those
3) As per new guideline in Selectivity and Specificity for analyte interference in blank
samples were comparing with the speific lot LLOQ response (Which lot used for BLK & LLOQ
Preparation) but why the ISTD response of the balnk samples were comparing with the
average response of accepted CCs & QCs why not comparing with respective LLOQ ISTD
response.Please clarify.

Thank You,

Information is Wealth,
Thangairulappan S

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