Manual Burettes PTFE Stopcock, Figure B, Capacity: 25mL

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Price: $18.45    

Product Feature

• PTFE Stopcock, Figure B
• Type : Borosilicate Glass
• Capacity : 25mL
• Graduated Interval : 0.1mL
• sold in each

Product Description

Manual Burettes PTFE Stopcock, Figure B, Capacity: 25mL

Manual Burettes PTFE Stopcock, Figure B, Capacity: 25mL Review

I was worried that I was getting something inferior because of the low price. The tube shows vertical striations, as if it is made of extruded plastic. Tapping it, it makes the sound of plastic. So I put the top in the flame of my stove, it started to color the flame sodium-yellow, but it didn't melt. Then I tested the graduations. I filled a 100mL volumetric flask using five runs of the burette. I found that the volume measured with the burette is within 1% of the flask's volume. So it seems to be a good product.

By the way, the maximum flow rate is about 0.5mL/second. It is easy to get it down to less than a drop per second.

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