volumetric burette

Volumetric burettes are precision-calibrated glass or PTFE instruments, typically 10–100 mL in capacity (most common: 50 mL), designed for titrations to measure delivered liquids with high accuracy. They conform to standards like ISO 385 or ASTM E287, featuring durable enamel markings, 0.05–0.1 mL graduations, and stopcocks (usually PTFE) for precise flow control.

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Product Information

Key Technical Specifications for Volumetric Burettes

Capacity & Accuracy: Popular sizes are 10 mL (0.02 mL tolerance), 25 mL (0.03 mL–0.05 mL tolerance), and 50 mL (0.05 mL–0.1 mL tolerance).
Class A vs. Class B: Class A burettes offer higher precision, calibrated to ASTM E287 or DIN ISO 385 standards, and often include a certificate of calibration.
Graduation Intervals: Standard 50 mL burettes are graduated every 0.1 mL, allowing estimation to the nearest 0.01 or 0.02 mL.
Material: Borosilicate glass (resistant to thermal shock and reagents) with PTFE (Teflon) stopcocks to eliminate the need for grease and prevent freezing.
Features: Clear, durable enamel graduations, tip designed for precise drainage, and often include automatic zeroing features (for automatic burettes).