Description
Kjeldahl flask, DURAN® is a laboratory glass vessel fitted with standard ground joint 29/32 and a nominal capacity of 750 ml for digestion and associated wet-chemical procedures. Manufactured in DURAN® glass, it supports Kjeldahl nitrogen determination and similar sample-preparation workflows that need a robust jointed flask for controlled heating and reagent handling. The NS 29/32 ground joint allows reliable connection to condensers, still heads and other standard jointed components found in analytical setups. Available as a single unit from manufacturer Lenz, the flask weighs 0,252 kg and integrates into common stands, heating mantles and digestion arrangements used with round flasks. The 750 ml volume offers additional headspace and working capacity for larger sample loads or extended digestion sequences in food, feed, environmental and quality-control laboratories as well as teaching environments. Pack size is 1 pc(s), suitable for replacing individual pieces or completing a matched set of Kjeldahl vessels. This DURAN® flask sits among round flasks and flasks with ground glass joints intended for everyday chemical laboratory use.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc(s)
- Product type: Kjeldahl flask
- Glass: DURAN®
- Capacity: 750 ml
- Ground joint: NS 29/32
- Weight: 0,252 kg
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Questions about Kjeldahl flask, DURAN®, with standard ground joint 29/32, 750 ml, 1 unit(s)
What is this article?
Kjeldahl flask, DURAN®, with standard ground joint 29/32, 750 ml, 1 unit(s) is the article on this page. Luminix Health distributes Lenz for laboratory use. It sits in Round-bottom flasks, inside Beakers & flasks, in Labware.
A round-bottom flask is the heating flask of a distillation or a reflux. The curved wall takes the heat, and the ground neck connects to a still head or a condenser. The joint size, not only the volume, has to match the rest of the set.
A beaker is an open working vessel: easy to pour, poor as a measure. An Erlenmeyer flask has a flat base and a conical wall so a liquid can be swirled without climbing out. A round-bottom flask is for heating under a condenser, because the heat meets a curved wall and the joint at the neck connects to the rest of the glassware. Borosilicate is the glass that survives the temperature change. These forms are listed under ISO laboratory glassware.
Which category should I open next?
The category is Beakers & flasks. The sub-category is Round-bottom flasks. The catalogue is Labware.
Shelves beside this one are Beakers, Erlenmeyer flasks, Reaction vessels & jacketed vessels, Flat-bottom flasks, Flasks (other) and Beaker & flask accessories.
What should I check before I order?
The technical information on this page is the manufacturer's sheet. Read that, not a rewritten specification.
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
How does ordering and shipping work?
Luminix Health distributes this article from the heart of Europe. Articles in stock ship within 2–5 business days. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.

