Laboratory Burette

Types of Burettes We Offer

Borosil Scientific provides a comprehensive range of burette glassware designed to meet specific analytical requirements. The selection includes variations in accuracy classes, stopcock materials, and glass colour options to suit diverse chemical applications.

The following table outlines the primary specifications available in our catalogue:

Applications of Burettes in Chemistry Labs

The burette chemistry lab setup is fundamental to quantitative chemical analysis. These instruments are engineered to dispense variable, measured amounts of a chemical solution.

Primary applications include:

• Acid-Base Titrations: Determining the concentration of an acid or base by neutralising it with a standard solution.
• Redox Titrations: Used in oxidation-reduction reactions to analyse the concentration of unknown analytes.
• Precipitation Titrations: Essential for determining the chloride ion concentration in water analysis.
• Standardisation: Verifying the exact molarity of a titrant before use in critical experiments.

For procedures involving reagents sensitive to UV light, such as iodine or silver nitrate, the use of amber burette glassware is necessary to maintain solution stability.

How to Choose the Right Burette for Your Lab?

Selecting the appropriate apparatus depends on the required precision and the chemical nature of the titrants used.

1. Accuracy Requirements

For analytical work requiring high precision, such as quality control in pharmaceutical testing, Class A burettes are recommended. Class A burettes are individually calibrated and supplied with an Individual Calibration Certificate for applicable models. This ensures the error margin remains within tight tolerances. For routine educational or qualitative work, Class B burettes provide a cost-effective solution.

2. Chemical Compatibility

The stopcock material dictates chemical compatibility. PTFE keys are chemically inert and resistant to attack from almost all chemicals, making them ideal for aggressive reagents. Glass stopcocks are suitable for standard solutions but may require lubrication to prevent seizing.

3. Operational Efficiency

Laboratories with high sample throughput may benefit from AutoBurettes. These units feature an integrated reservoir and a filling mechanism that sets the meniscus to zero automatically, reducing setup time between titrations.

Why Choose Borosil Scientific Burette Glassware?

Borosil Scientific burette glassware is manufactured from 3.3 low-expansion borosilicate glass. This material is chosen for its high resistance to thermal shock and chemical corrosion, ensuring the instrument maintains its calibration over time.

Key advantages include:

• Calibration Accuracy: Class A burettes are individually calibrated to deliver precise volumes and meet specified volumetric tolerances, while Class B burettes are suitable for standard laboratory requirements.
• Durability: The robust construction of the stopcock assembly, particularly in PTFE and Boroflo models, reduces the risk of leakage and breakage during routine use.
• Legibility: Graduation marks are printed in durable enamel, ensuring readability persists even after repeated cleaning cycles.
• Traceability: Class A burettes are supplied with certificates that provide traceability to national standards, a requirement for NABL-accredited laboratories.

Together, these features make Borosil Scientific burettes a dependable choice for accurate and repeatable volumetric analysis in chemistry laboratories.