Flasks, Kjeldahl

GISCOM  Kjeldahl Flasks are precision-engineered laboratory flasks designed specifically for nitrogen determination through the Kjeldahl method. These flasks provide excellent heat resistance, chemical durability, and uniform wall thickness to ensure accurate digestion and distillation results. Ideal for routine and high-performance analysis, they are essential for laboratories that require reliable and reproducible quantitative analysis of organic nitrogen. Their robust construction makes them suitable for continuous use in chemical, pharmaceutical, food, fertiliser, and environmental testing laboratories.

Key Features

• High-Quality Borosilicate Glass 3.3: Ensures exceptional thermal resistance during digestion and distillation.
• Uniform Wall Thickness: Provides consistent heating and minimises the risk of thermal shock.
• Precise Design for Kjeldahl Applications: Optimised shape for controlled boiling and efficient reagent recovery.
• Chemical Resistant: Resistant to strong acids, alkalis, and aggressive digestion reagents.
• Autoclavable & Reusable: Designed to withstand repeated sterilisation cycles.
• Leak-Proof Compatibility: Works seamlessly with Kjeldahl digestion units, condensers, and distillation setups.
• Smooth, Clear Construction: Easy visual monitoring of reactions and sample conditions.
• Available in Multiple Capacities: Suitable for various laboratory scales and analytical requirements.

Material Specifications

• Material: High-grade Borosilicate Glass 3.3
• Thermal Expansion Coefficient: ~3.3 × 10⁻⁶ /°C
• Thermal Shock Resistance: Excellent; suitable for high-temperature chemical digestion
• Chemical Resistance: High resistance to acids, alkalis, organic solvents, and digestion chemicals
• Standards Compliance: Manufactured in accordance with international laboratory glassware standards (ISO/DIN)
• Mechanical Strength: Enhanced durability due to controlled annealing and uniform wall distribution

Technical Specifications

• Available Capacities: Common capacities include 300 ml to 800 ml (as per the standard size table)
• Design: Round bottom with elongated neck optimised for Kjeldahl digestion
• Neck Options: Standard or thick-walled neck for condenser connectivity
• Tolerance: High accuracy with consistent internal volume calibration
• Heat Resistance: Suitable for temperatures up to ~550°C (with controlled heating)
• Packaging: Individually wrapped or bulk-packed; export-grade shockproof packaging ensures safe global shipment
• Customisation: OEM branding, custom neck sizes, and private labelling are available upon request

Handling & Precautions

• Safe Use: Heat gradually to avoid sudden thermal stress; use with appropriate digestion stands.
• Cleaning: Rinse immediately after use; compatible with acid cleaning solutions; avoid abrasive pads.
• Autoclaving: Fully autoclavable; ensure gradual heating and cooling cycles.
• Heating Limits: Do not expose to direct flame without support; maintain uniform heating during digestion.
• Dos: Use with compatible Kjeldahl digestion systems. Inspect for cracks before use. Allow gradual cooling after high-temperature operations
• Don’ts: Avoid rapid temperature changes. Do not use if chipped or damaged. Do not apply mechanical force to the neck or body
• Best Practices: For the longest life, follow proper heating ramps, store upright, and clean immediately after acidic digestions.

Applications

• Chemical & Analytical Laboratories: Essential for nitrogen determination via Kjeldahl digestion.
• Pharmaceutical Industry: Quality control of raw materials and formulations.
• Food & Beverage Testing: Protein estimation in dairy, cereals, meat, and processed foods.
• Agricultural & Fertiliser Labs: Analysis of nitrogen content in fertilisers and soil samples.
• Biotechnology & Research Institutions: Protein and amino acid analysis in biological samples.
• Environmental Testing Labs: Determination of nitrogen in wastewater and effluents.
• Educational & Academic Institutions: Ideal for training, teaching, and routine laboratory demonstrations.