Description
Kjeldahl flask 100 ml NS 29/32 is a jointed laboratory flask for Kjeldahl nitrogen determination and comparable wet digestion procedures. It offers a nominal volume of 0,1 l together with a larger standard ground joint NS 29/32, enabling direct connection to matching condensers, splash heads and distillation assemblies. The characteristic Kjeldahl shape promotes steady boiling behaviour and good contact between sample and digestion reagents under heating. Packaged as 10 pc(s), each flask has a net weight of 0,07 kg and suits multi-sample analytical sequences. Available from manufacturer Witeg, this 100 ml version with NS 29/32 is aligned with widely used European ground-joint standards. It is applied in food chemistry, feed analysis, environmental testing and agricultural laboratories where total nitrogen or protein content is determined by the Kjeldahl method, as well as in general acid-digestion sample preparation. Transparent glass walls allow continuous observation of the digest, supporting controlled and reproducible laboratory practice.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 10 pc(s)
- Nominal volume: 0,1 l
- Joint size: NS 29/32
- Country of origin: Germany
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Questions about Flasks, Kjeldahl, made from DURAN tubing
What is this article?
Flasks, Kjeldahl, made from DURAN tubing is the article on this page. Luminix Health distributes Witeg 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.
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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.
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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.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.

