DURAN 212314404 Kjeldahl Flask Borosilicate Glass 500 mL
The DURAN 212314404 is a 500 mL Kjeldahl flask manufactured from high-quality DURAN® borosilicate glass 3.3. This flask is designed for Kjeldahl digestion and distillation, a standard method for determining nitrogen and protein content in food, feed, fertilizers, and environmental samples.
Its round-bottom geometry ensures optimal heat distribution during digestion, reducing hot spots and enhancing reaction efficiency. The narrow neck allows secure attachment to condensers and distillation units. The use of borosilicate glass 3.3 provides excellent chemical resistance to concentrated sulfuric acid, alkalis, and aggressive reagents, while maintaining stability under repeated thermal cycling.
Key Specifications & Features
| Parameter | Value |
|---|---|
| Catalogue Number | 212314404 |
| Product Type | Kjeldahl Flask |
| Capacity | 500 mL |
| Material | DURAN® Borosilicate Glass 3.3 |
| Shape | Round-bottom |
| Neck Type | Narrow neck |
| Thermal Resistance | High, uniform wall thickness |
| Chemical Resistance | Excellent, Type I neutral glass |
| Sterilization | Autoclavable (~121 °C) |
Applications
Nitrogen and protein determination by Kjeldahl method
Food and beverage laboratories (protein analysis, nutrition testing)
Agriculture and fertilizer testing
Animal feed analysis
Environmental analysis (soil, sludge, wastewater digestion)
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