Burette Care and Calibration: Extending Accuracy and Glassware Life

Burettes are among the most precise pieces of laboratory glassware, but their accuracy depends on proper care and regular calibration. For Australian labs in education, research, and industry, maintaining burettes correctly not only extends their service life but also ensures reliable titration results.

The first step in care is correct cleaning. After each use, burettes should be rinsed with distilled water to remove any residual solutions. When switching between reagents, they should be flushed thoroughly with the new solution to avoid contamination. Avoid using abrasive brushes or strong alkalis that may scratch or weaken BORO 3.3 glass.

Calibration is equally important. ISO 385 and ASTM E287 standards specify tolerances, but over time, repeated use can affect accuracy. Professional calibration services or in-house checks using standardised solutions ensure burettes remain within tolerance. PTFE stopcocks require less maintenance, but both PTFE and glass keys should be checked for smooth operation and leaks.

Storage also plays a role in longevity. Burettes should be stored vertically in burette stands, avoiding prolonged exposure to direct sunlight which can fade graduation marks. With proper care, LabChoice BORO 3.3 burettes deliver years of reliable service while maintaining compliance with international standards.

FAQs

How often should burettes be calibrated?
Regularly in research and industry — at least annually, or more often in high-use labs.

What is the best cleaning method for burettes?
Rinse with distilled water and avoid abrasive scrubbing to protect the glass.

Do PTFE stopcocks require lubrication?
No, PTFE operates smoothly without grease, unlike traditional glass stopcocks.

What is the proper way to store burettes?
Always store vertically in a burette stand to prevent bending or leakage.

Do LabChoice burettes meet international calibration standards?
Yes, they comply with ISO 385 and ASTM E287.

References

• ISO 385: Laboratory Glassware – Burettes
• ASTM E287: Standard Specification for Glass Burettes
• ACS Analytical Chemistry Guidelines
• NIST Measurement Standards