Description
Kjeldahl test tube LBG 3.3, Ø42 x 300 mm is a single digestion tube manufactured from borosilicate glass 3.3 for nitrogen analysis and related wet-chemical applications. The tube combines a round bottom with a beaded rim, giving stable seating in heating blocks and a secure grip during transfer and cooling steps. Supplied as 1 piece with a net weight of 0,068 kg, it is practical for method development, spare replacement or low-throughput Kjeldahl work. Borosilicate 3.3 glass delivers the thermal and chemical resistance needed when samples are digested with concentrated acids at elevated temperature. Diameter 42 mm and length 300 mm provide suitable capacity for standard digestion loads while fitting common laboratory racks and digester blocks. This tube from manufacturer Labbox is part of the LBG range and is compatible with LBX Instruments equipment in the DTU3-042 series, supporting integration into existing Kjeldahl setups. It is well suited to protein and total nitrogen determination in food, feed, environmental and quality-control laboratories that require durable, reusable glass digestion tubes.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
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Questions about Digestion tube, LBG 3.3, Ø42 x 300 mm, 1 pc
What is this article?
Digestion tube, LBG 3.3, Ø42 x 300 mm, 1 pc is the article on this page. Luminix Health distributes Labbox 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.
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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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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.

