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Common Laboratory Glassware
and Volumetric Glassware
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GLASSWARE Graduated Cylinder Griffin Beaker Erlenmeyer Flask
Graduated Pipet
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GLASSWARE Approximate Graduations Griffin Beaker
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GLASSWARE Approximate Graduations Erlenmeyer Flask
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Used for Routine Volume Measurements
GLASSWARE Graduated Cylinder Used for Routine Volume Measurements of 25 mL or Greater
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Use When Solids in Sample Used for Routine Volume Measurements
GLASSWARE Wide Tip Use When Solids in Sample Used for Routine Volume Measurements of 25 mL or Less Graduated Pipet
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Use When Solids in Sample
GLASSWARE Wide Tip Use When Solids in Sample NOT VOLUMETRIC Graduated Pipet
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Accuracy and Precision Required When Preparing or Using
Volumetric Glassware Required for High Accuracy and Precision Required When Preparing or Using Standard Solutions
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Volumetric Transfer Pipet
Volumetric Glassware Accuracy and Precision Standard Solutions Volumetric Flask Buret Volumetric Transfer Pipet
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VOLUMETRIC GLASSWARE Must Be Used Properly
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BURET
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BURET To Deliver Calibration Temperature
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Rinse With Titrant Completely Coat Inside Surface
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Beads of Liquid Not Clean
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Rinse Three Times Fill to Above Top Graduation
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Discharge All Air Bubbles
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Drain Until Top of Liquid Is In Graduations
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Curved Surface of Liquid MENISCUS
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MENISCUS READER
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Proper Reading X O X
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Bottom of Meniscus to Top of Graduation
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Increase Ten Graduations }
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24.16 9.64
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Proper Grip Record Initial Reading Add Indicator
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Mix Well Near Endpoint
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Split Drops Transfer To Flask Rinse Into Reaction
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Final Reading – Initial Reading = Volume Delivered
At Endpoint Record Final Reading Read Final Reading – Initial Reading = Volume Delivered
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Properly Dispose Excess Properly Clean Air Dry
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Proper Storage
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Volumetric Transfer Pipets
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Volumetric Transfer Pipets
One Calibration To Deliver Calibration Temperature
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Fill By Vacuum
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Fill By Vacuum Rinse Pipet Bulb
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Must Drain Evenly Not Clean
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Wipe Tip Touch Container To Remove Drop Fill Above Calibration Drain
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Allow To Drain Some Will Remain In Tip Touch Tip To Flask
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Exception ETCHED Ring NOT Painted FOR BLOW-OUT
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Air Dry Properly Clean
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Using Volumetric Pipets
1. Rinse with solution to be pipeted (Observe for even draining) 2. Fill to above graduation 3. Wipe off outside of pipet 4. Drain to graduation ( bottom of meniscus to top of graduation) 5. Touch tip to waste vessel 6. Transfer by gravity (vertical - don’t force) 7. Touch tip to inside of receiving flask (clean pipet)
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Volumetric Flasks
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To Contain TC NOT Intended To Deliver
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With Accurately Known Concentration
To Prepare Solutions With Accurately Known Concentration
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Fill Drop-wise To Calibration Fill Half And Mix Fill To Below Graduation
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Invert Rapidly
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Properly Clean Transfer To Reagent Bottle Air Dry
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Volumetric Transfer Pipet
Volumetric Glassware Accuracy and Precision Standard Solutions Volumetric Flask Buret Volumetric Transfer Pipet
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