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A typical test tube is long and narrow, with a curved base and flared top. A test tube is a kind of laboratory glassware, composed of a fingerlike length of glass tubing, open at the top, usually with a rounded lip at the top, and a rounded 'U' shaped bottom.
They range in size from a couple inches to several inches long, from a few millimeters to a couple centimeters in diameter. They are designed to allow easy heating of samples, to be held in a flame, and often are made of expansion-resistant glasses, such as borosilicate glass (known by brand-names such as Pyrex and Kimax).
Tests tubes are often preferred above beakers when multiple small chemical or biological samples have to be handled and/or stored.
Vacutainers are a type of test tube that can be used for both collection and storage of blood.
仲有其他lab用具既英文:
Laboratory Laboratory equipment Agar plate | Aspirator | Bunsen burner | Calorimeter | Colorimeter | Centrifuge | Fume hood | Microscope | Microtiter plate | Plate reader | Spectrophotometer | Thermometer | Vortex mixer | Static mixer Laboratory glassware Beaker | Boiling tube | Büchner funnel | Burette | Conical measure | Crucible | Cuvette | Laboratory flasks (Erlenmeyer flask, Florence flask, Volumetric flask, Büchner flask) | Gas syringe | Graduated cylinder | Pipette | Petri dish | Separating funnel | Soxhlet extractor | Test tube | Thistle tube | Watch glass
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