Burettes
Burettes
Used to dispense and measure a variable amount of a chemical solution in analytical chemistry at the same time, burettes feature a long, graduated glass tube with a stopcock on its lower end for liquid measurement. The stopcock valve is used to control the flow of liquid from the burette in either a steady stream or drop-by-drop. Unlike a pipette, the sample quantity delivered by a burette is changeable. For gas measuring burettes, the stopcock is located at the top of the burette’s glass tube. Digital burettes that deliver exactly measured samples, increasing accuracy and precision, are also available.
Titrations are performed to determine the concentration of a specific substance by adding another substance that interacts with the first to neutralize it or to form another compound. Liquid is slowly dispensed from a burette into a flask or beaker that holds a known amount of the test substance. The burette has a solid glass or PTFE stopcock or other fitting to regulate the flow of the liquid.
The “unknown” substance is mixed constantly (via magnetic stirrer/stir bar or similar method) to ensure that the reaction is complete. Often, the end-point of the reaction is a specific change in the acidity or pH of the liquid; a chemical indicator may be used to produce a color change when the reaction is complete.
Burettes may be designed for single or multiple uses; replacement stopcocks, glassware, and other parts are available for most reusable versions.
Other burette features include:
- Material: Glass or plastic
- Size: Usually from 10 mL to 50 mL capacities
- Graduations: Choice of precision (0.01 or 0.1 mL)
- Certification: Class A or Class B, serialized and non-serialized
- Construction: Single-use or with replacement parts
- Types: Standard or self-filling/automatic
- Burets with PTFE-plug stopcocks
- Break-resistant, self-zeroing automatic burets
- Reservoir fill burets
Filtered Search Results
Eisco™ Glass Burette with PTFE Key Stopcock
Science Education
A science education product.
A science education product.
Glass Burettes with PTFE Key Stopcock are designed with a single straight bore and features easy to read, printed graduations. Class-A and Class-B versions available.
Includes | PTFE Stopcock |
---|---|
Type | Straight Bore Buret |
Warranty | 1 year limited manufacturer |
For Use With (Equipment) | Clamps, lab stand |
Color | Clear |
Stopcock Material | PTFE |
Material | Borosilicate Glass (3.3) |
For Use With (Application) | Titration |
Autoclavable | Autoclavable |
United Scientific™ Automatic Burette, Glass, Class A, Individually Certified
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Science Education
A science education product.
Small and/or diverse supplier based on Federal laws and SBA requirements.
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A science education product.
This Class A Automatic Self-zeroing Glass Burette is mounted on a glass bottle. Individually certified.
Includes | PTFE Needle valve stopcock, intermediate stopcock, and rubber bellows |
---|---|
Stopcock | Needle Valve |
Warranty | 1 Year |
Color | Clear |
Stopcock Material | PTFE |
Class | Class A |
Material | Glass |
For Use With (Application) | Used for accurate dispensing of a liquid, most commonly for titrations |
Closure Type | Jointed |
Autoclavable | Autoclavable |
Eisco™ Class A Glass Schellbach Burette with PTFE Stopcock
Science Education
A science education product.
A science education product.
Eisco™ Class A Glass Schellbach Burette with PTFE Stopcock has a white backing and blue graduations to allow for easy reading and the highest accuracy in measuring clear liquids.
Stopcock | Straight |
---|---|
Type | Schellbach Buret |
Stopcock Material | PTFE |
Class | Class A |
Scale | Blue |
Material | Borosilicate Glass |
Certifications/Compliance | DIN 12700,ISO 385 |
For Use With (Application) | Dispensing Liquid |
Eisco™ Acrylic Burette with PTFE Key Stopcock, Class B
Science Education
A science education product.
A science education product.
Transparent acrylic burette features easy to read graduations and leakproof PTFE plunger stopcock.
Stopcock | Key |
---|---|
Color | Clear |
Stopcock Material | PTFE |
Class | Class B |
Scale | Blue print scale |
Material | Acrylic |
For Use With (Application) | Titration, Dispensing |
Autoclavable | Not Autoclavable |
Graduations | 0.10 mL |
Supertek Scientific Acrylic Burets
Science Education
A science education product.
A science education product.
Transparent buret with leakproof stopcock fitted with self lubricating PTFE plug.
Type | Buret |
---|---|
Material | Acrylic |
Eisco™ Class A Glass Burettes with Glass Key Stopcock
Science Education
A science education product.
A science education product.
Eisco™ Class A Glass Burettes with Glass Key Stopcock designed with blue graduations and a straight single bore.
Type | Straight Bore Buret |
---|---|
Stopcock Material | Glass |
Class | Class A |
For Use With (Application) | Dispensing Liquid |
Eisco™ Class A Glass Automatic Schellbach Zero Burettes with Intermediate Stopcock, Reservoir and Bellow
Science Education
A science education product.
A science education product.
High-quality Class-A automatic zero burettes made from borosilicate 3.3 glass. Designed with Schellbach burette, an intermediate PTFE stopcock and rubber bellow, calibrated for delivery. Includes glass reservior.
Stopcock | Yes |
---|---|
Color | Clear |
Plug Material | PTFE |
Material | Borosilicate Glass (3.3) |
For Use With (Application) | Dispensing liquid |
Closure Material | PTFE |
Includes | Burette, reservoir, bellow, joint clip |
Type | Automatic Self-zeroing Schellbach Buret |
For Use With (Equipment) | Labware |
Stopcock Material | PTFE |
Class | Class A |
Certifications/Compliance | DIN ISO 385 |
Closure Type | Intermediate Stopcock |
Autoclavable | Yes |
United Scientific™ Class A Burette with PTFE Stopcock, Batch Certified
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Small and/or diverse supplier based on Federal laws and SBA requirements.
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Science Education
A science education product.
Small and/or diverse supplier based on Federal laws and SBA requirements.
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A science education product.
Burettes offering an affordable alternative for laboratory use.
Includes | Stopcock |
---|---|
Stopcock | Straight Bore |
Type | Buret |
Warranty | 12 Months |
Color | Clear |
Plug Material | PTFE |
Stopcock Material | PTFE |
Class | Class A |
Material | Borosilicate Glass (3.3) |
Certifications/Compliance | ASTM E287 Batch Certified |
Autoclavable | Autoclavable |
Eisco™ Class B Glass Automatic Zero Burettes with Reservoir and Bellow
Science Education
A science education product.
A science education product.
High quality Class-B automatic zero burettes made from borosilicate 3.3 glass. Designed with a PTFE Stopcock and rubber bellow, calibrated for delivery. Includes Reservior.
Stopcock | Yes |
---|---|
Color | Clear |
Plug Material | PTFE |
Material | Borosilicate Glass (3.3) |
For Use With (Application) | Dispensing liquid |
Closure Material | PTFE |
Includes | Burette, reservoir, bellow |
Type | Automatic Self-zeroing Buret |
For Use With (Equipment) | Labware |
Stopcock Material | PTFE |
Class | Class B |
Certifications/Compliance | DIN ISO 385 |
Closure Type | Stopcock |
Autoclavable | Yes |
United Scientific™ Class B Burette with Screw Thread Stopcock
Supplier Diversity Partner
Small and/or diverse supplier based on Federal laws and SBA requirements.
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Science Education
A science education product.
Small and/or diverse supplier based on Federal laws and SBA requirements.
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A science education product.
Burettes offering an affordable alternative for laboratory use.
Includes | Stopcock |
---|---|
Stopcock | Screw Thread |
Type | Buret |
Warranty | 12 Months |
Color | Clear |
Plug Material | PTFE |
Stopcock Material | PTFE |
Class | Class B |
Material | Borosilicate Glass (3.3) |
Autoclavable | Autoclavable |
United Scientific™ Class B Burette with PTFE Detachable Stopcock
Supplier Diversity Partner
Small and/or diverse supplier based on Federal laws and SBA requirements.
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Science Education
A science education product.
Small and/or diverse supplier based on Federal laws and SBA requirements.
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A science education product.
Burettes offering an affordable alternative for laboratory use.
Includes | Stopcock |
---|---|
Stopcock | Detachable |
Type | Buret |
Warranty | 12 Months |
Color | Clear |
Plug Material | PTFE |
Stopcock Material | PTFE |
Class | Class B |
Material | Borosilicate Glass (3.3) |
Autoclavable | Autoclavable |
Eisco™ Amber Glass Burette with PTFE Key Stopcock
Science Education
A science education product.
A science education product.
Amber Glass Burette suitable for light-sensitive chemicals is certified for Class A accuracy
Type | Straight Bore Buret |
---|---|
Color | Amber |
Class | Class A |
Material | Amber Borosilicate Glass |
Autoclavable | Autoclavable |
United Scientific™ Class B Burette with PTFE Stopcock
Supplier Diversity Partner
Small and/or diverse supplier based on Federal laws and SBA requirements.
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Science Education
A science education product.
Small and/or diverse supplier based on Federal laws and SBA requirements.
Learn More
A science education product.
Burettes offering an affordable alternative for laboratory use.
Includes | Stopcock |
---|---|
Stopcock | Straight Bore |
Warranty | 12 Months |
Color | Clear |
Plug Material | PTFE |
Stopcock Material | PTFE |
Class | Class B |
Material | Borosilicate Glass (3.3) |
Autoclavable | Autoclavable |
United Scientific™ Acrylic Buret
Supplier Diversity Partner
Small and/or diverse supplier based on Federal laws and SBA requirements.
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Science Education
A science education product.
Small and/or diverse supplier based on Federal laws and SBA requirements.
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A science education product.
Acrylic burets offer high quality and an affordable price.
Includes | PTFE Plug |
---|---|
Stopcock | Yes |
Type | Buret |
For Use With (Equipment) | Support Stands and Glassware |
Color | Clear |
Plug Material | PTFE |
Stopcock Material | PTFE |
Material | Acrylic |
For Use With (Application) | Measuring liquid or gas |
Autoclavable | Not Autoclavable |
Kimble™ KIMAX™ Burets with Replaceable PTFE Stopcock
Supplier Diversity Partner
Small and/or diverse supplier based on Federal laws and SBA requirements.
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Science Education
A science education product.
Small and/or diverse supplier based on Federal laws and SBA requirements.
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A science education product.
Replaceable glass barrels and tips.