Description
Test tubes 16 x 180 mm NS 14/23 are ungraduated round-bottom laboratory tubes manufactured from DURAN tubing and supplied with matching NS-PE stoppers. The standard ground joint NS 14/23 accepts the polyethylene stopper to close the tube securely for sample handling, temporary storage or straightforward laboratory reactions. Made from DURAN tubing, these glass tubes deliver the clarity and robustness associated with quality laboratory glassware. Available as a pack of 10 pieces from manufacturer Witeg, the 16 mm diameter by 180 mm length format suits general analytical, preparative and educational work where a slightly taller tube is preferred. The round bottom promotes uniform heating when required, and the transparent wall permits easy visual checks of contents or colour changes. With the NS 14/23 joint and PE stopper combination, the tubes help reduce evaporation and contamination compared with open containers. They are intended for routine laboratory use that calls for reliable, reusable glass test tubes with standardised ground joints.
This article is part of Test tubes, in Tubes & vials.
Key features
- Pack size: 10 pc(s)
- Dimensions: 16 x 180 mm
- Joint size: NS 14/23
- Construction: DURAN tubing
- Bottom shape: Round bottom
- Stopper: NS-PE stopper
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Questions about Test tubes 16 x 180mm ST 14/23
What is this article?
Test tubes 16 x 180mm ST 14/23 is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Test tubes, inside Tubes & vials, in Labware.
A test tube is the open cylindrical vessel for a small liquid, in borosilicate glass or in plastic. Rimmed and rimless mouths differ. The size is diameter by length. It is not graduated for a result, and a glass tube that will be centrifuged has a force limit.
A tube holds a small sample upright. A test tube is the open glass or plastic cylinder. A centrifuge tube is conical so a pellet forms at the tip, and it is rated for a centrifugal force the rotor will actually reach. A vial is a small closed bottle, often for a sample that will sit in an instrument. NMR tubes are a special case: the glass has to be uniform or the spectrum is the tube, not the sample. Laboratory ware is listed under ISO laboratory glassware.
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Shelves beside this one are Centrifuge tubes (conical), Sample vials & NMR tubes and Tube & vial accessories.
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