what are the normalisation, internal standard and external
standerd methods in HPLC.
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Answer / gitush
External standard is a standard that you bought. Internal standard is the one that you tested and compared to external standard, found it at the same or higher purity and use as a standard in your laboratory / company. Normalization is a process of getting the right concentrate calculated based on standard.
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Answer / s.goutham
internal standard method method known amount of standard
was added in sample. External stanadard method standard
eas perform seperately not with sampe. area normalaisation
was injected as such
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10 Answers Dr Reddys, Shasun Chemicals,
Organic Chemistry 
