Why the same type of columns showing different RT for a single
product?

Answer Posted / satheesh kumar

In HPLC same type of columns means say C18,there are lot of
brands C18 columns available in market namely
inertsil,Symmetry,X-Terra,phenomenex gemini,Zorbax etc.,

Each columns are not similar in packing and carbon
load.column chemistries will vary with one another.

Hence RT shift observed in same types of columns.

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