Page 1 of 1
what is purity expectation for primary reference standard
Posted: Wed Apr 01, 2015 2:54 pm
by jiangds06
what is the specification for the primary reference standards for analytical study?
Re: what is purity expectation for primary reference standar
Posted: Thu Apr 02, 2015 6:26 am
by Alfred88
For USP RS, the purity is 100%, unless stated differently, such as 99% (or purity factor 0.99).
Check the latest USP catalog for the relevant info for current/valid lots and purity.
Re: what is purity expectation for primary reference standar
Posted: Mon Apr 06, 2015 12:14 pm
by jiangds06
how it could be possible 100%?
For USP RS, the purity is 100%, unless stated differently, such as 99% (or purity factor 0.99).
Check the latest USP catalog for the relevant info for current/valid lots and purity.
Re: what is purity expectation for primary reference standar
Posted: Mon Apr 06, 2015 2:48 pm
by Fernando
Hi jiangds06
I think that the number its really not very important (for sure there are primary stds of 95,0 % or less) but the most important thing is the certificate of analysis that accompany that PS (for example USP)
Best luck
Fernando