Glassware calibration

What is referance guideline for glass ware calibration?

Class A volumetric glassware which comes with its own ASTM certification should
be all you have ever used.

But still is it require verification for the A class glassware??

Class A glassware has a certificate of calibration hance it is not required.

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Thanks.

No need to again for a grdae and b grade calibration to be performed as per perri

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What is b grade calibration?

With out cerified glasswere known as B grade

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I would like to point out that the standards and control results (SOP) verify you have used suitable glassware.

Performance Verification is required,

Reference:
Pharmaceutical Guidelines
SOP for calibration of Glassware
and
Test method # 〈31〉 VOLUMETRIC APPARATUS- USP 35