Common%20Laboratory%20Glassware%20and%20Volumetric%20Glassware

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Common Laboratory Glassware and Volumetric
Glassware
Prepared By Michigan Department of Environmental
Quality Operator Training and Certification Unit
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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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GLASSWARE
Graduated Cylinder
Used for Routine Volume Measurements of 25 mL or
Greater
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GLASSWARE
Wide Tip Use When Solids in Sample
Used for Routine Volume Measurements of 25 mL or
Less
Graduated Pipet
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GLASSWARE
Wide Tip Use When Solids in Sample
NOT VOLUMETRIC
Graduated Pipet
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Volumetric Glassware
Required for High Accuracy and Precision
Required When Preparing or Using Standard
Solutions
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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
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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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Ten Graduations
Increase

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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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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 To Calibration
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Some Will Remain In Tip
Allow To Drain
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 - dont 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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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 Glassware
Accuracy and Precision
Standard Solutions
Volumetric Flask
Buret
Volumetric Transfer Pipet
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Common Laboratory Glassware and Volumetric
Glassware
Prepared By Michigan Department of Environmental
Quality Operator Training and Certification Unit