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Why pyrene is also use for calibration if detector
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Bcoz. It gives higher absorbance band ,lambda max 373 nm .rather than caffeine. That's why
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How can we confirm the HPLC column is end-capped or not? Is it possible to identify by physical appearance?
In partical size by malven,which parameter is generlly change for development of dry and wet method.
why we use 0.1% acetone in gradient calibration of HPLC?
3 Answers Cipla, Dr Reddys, FDC,
Why a1% value is used for some product ? What is the criteria for selection a1% value ?
what is diffrence between shelf life and expiry date?
Why are use silicon oil mr?
when we talk about change in entropy we consider total entropy means of surround +entropy of system but when we talk about change in Gibss free energy we consider entropy of system.explain with reason.
What are the tests used in Hplc?Name any two.
what is the difference between polarimeter lamp and ir lamp
tell me about aliphatic acid estimation by hplc which columns can we use
what is the conductivity of hplc grade water?
Why are using in Hi,zero air, Ni gass are used GC
5 Answers Aurobindo, ELBS, Vimta Labs,
Organic Chemistry 
