Burette: Burettes, Beakers, Pipettes Graduated Cylinders
The Burettes has everything you need to support and enhance your laboratory work and experiments. These products are the tools you need for precise and accurate measurement of liquids in the scientific world. Whether you need a burette clamp, holder or the burette itself, this category has it all to give you reliable and accurate results.
One of the key products is the Ohaus Clamp, Holder, CLC-CLMPHA. This clamp holder gives you a secure grip on burettes, stability during measurements. It’s designed to hold burettes in place, preventing any accidents or spills that could compromise your experiments.
For those who need a multi-purpose clamp, the Ohaus Clamp, Multi-Purpose, CLM-MULTI3DZM is the way to go. This clamp can hold various laboratory equipment including burettes in place. Its adjustable design gives you a precise fit, stability and accuracy during experiments.
Overall the digital burette is a must have for any laboratory or scientific setting that requires precise liquid measurement with digital burettes. The range of products here ensures you can find the right clamp, holder or burette for your needs. With these reliable and high quality tools you can do your experiments and measurements with confidence knowing your results will be accurate and reliable.
Burettes in Laboratories
Introduction
Burettes are essential tools in the modern laboratory, used for quantitative chemical analysis and various titration methods. A buret is a glass tube used for delivering precise volumes of liquid, particularly in titrations. They are precision instruments designed for measuring and dispensing variable amounts of a liquid burette, particularly in volumetric analysis. This overview will cover the features, applications and importance of burettes, including digital and borosilicate glass burettes across many industries from pharmaceuticals to cosmetics.
What are Burettes
Definition and Basic Design
A burette is a long, graduated borosilicate glass capillary tube with a tapered end and a stopcock valve at the lower end to control the flow. The long graduated glass tube of the burette is made of borosilicate glass to resist thermal shock and chemical corrosion and with the later added graduations. It is precisely calibrated to measure the nominal volume of liquid dispensed with high accuracy, critical for applications such as titrations where precise volume measurements are required. The volume of liquid dispensed is determined by reading the graduations on the burette at specific liquid levels before and after dispensing.
Types of Burettes
Glass Burettes: These are traditional models featuring a long graduated glass tube. They are favored for their clarity and resistance to many chemicals. They come in various volume capacities such as 5 mL, 10 mL and 50 mL for precise and reliable measurements for titrimetric purposes. Additionally, for measuring larger volumes of liquid, consider a Glass Graduated Cylinder, 1000ml for the same reliability in your lab work.
Digital Burettes: Incorporate electronic features with a digital display to read the lower volume more accurately. They are equipped with a motorized piston drive and have features like increased resolution and easy calibration.
Piston Burettes: Operate on a piston mechanism similar to that of a high precision syringe and are known for delivering small volumes.
Features of Burettes
Graduations and Calibration
Accurate Measurements: Burettes are marked with later added graduations inscribed along the length of the tube. These markings are calibrated for precise measurement to ensure accurate dispensing of material. The error limits of our burettes comply with the standards set by ISO and DIN for high reliability.
Calibration Classes: Burettes are available in different accuracy classes. Class A and Class B burettes for example offer the highest reliability and are often used in professional labs where small measurement errors can make a big difference in the outcome.
Material and Construction
Borosilicate Glass: Most glass burettes are made of borosilicate due to its excellent chemical resistance and minimal thermal expansion, ideal for handling strong acids and bases as well as organic solvents.
Resistant Plastic Material: Some modern burettes are made of durable, chemically resistant plastics. These are less fragile than glass and fully autoclavable, making them suitable for repeated sterilization.
Applications of Burettes
Volumetric Analysis
Titration: Burettes are most commonly used for titration, a method where a chemical solution of known concentration (titrant) is used to determine the concentration of an unknown solution. The precise control over the dispensed allows for the accurate determination of the end point of the reaction. The calibration of DURAN® burettes takes into account factors like adhesion to glass so you can measure quantities precisely.
Neutralization Reactions: In acid-base titrations, burettes are used to add an acid to a base (or vice versa) until the reaction is complete, indicated by a pH change or color change in an indicator.
Industrial Applications
Pharmaceutical Industry: Burettes are used to perform content uniformity tests and to ensure precise formulation of pharmaceutical products.
Cosmetic Industry: Used in the formulation of cosmetics where exact quantities need to be mixed to maintain product consistency and quality.
Maintenance and Handling of Burettes
Cleaning and Storage
Routine Cleaning: Proper cleaning involves rinsing the burette with deionized water and the solution it will dispense to prevent contamination.
Storage: When not in use, burettes should be stored upright, with the stopcock in the open position to allow air circulation and prevent pressure buildup inside.
Calibration
Regular Calibration: Burettes need to be calibrated regularly to ensure they deliver accurate volumes. Volume tolerances are crucial for precise measurements as they correspond to the error limits defined by ISO and DIN standards. Calibration involves checking the volume delivered against a standard and making adjustments as necessary.
Air Bubbles: Be sure to remove any air bubbles in the burette as they can cause measurement errors.
