Graduated cylinders pharmaceutical

Graduated Cylinder Here the term Style refers to the physical structure of the opened end. Pharmaceutical Cylinder Here the term Style refers to the calibrations. 

From ASTM specifications E 1094-86 (Standard Specification for Pharmaceutical Glass Graduates) and E 1272-89 (Standard Specification for Graduated Cylinders). 

Pharmaceutical graduated cylinders, which can be identified by their non-vertical walls,f have poor accuracy. Their accuracy varies at any given inside wall diameter, even on the same flask. For instance, at regions where the inside diameter is between 21 and 25 mm, the accuracy is 0.4mL. However, at regions where the inside diameter is between 46 and 50 mm, the accuracy is 1.8 mL. 

The measuring cylinders that are used in pharmaceutical preparation processes have to comply to international standards for graduated measuring cylinders (ISO norm 4788) [23]. A measuring cylinder is calibrated either to contain or to deliver (marked TC (to contain) (or IN ) or... 

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