Capillary
| Formula / Notation | h = 2γ cosθ / (ρgr) |
|---|---|
| Also Known As | Capillary tube, hair-like tube, capillary column (chromatography) |
What is Capillary?
A capillary is a very narrow tube, typically with an internal diameter of less than 1 mm, used in chemistry for capillary action, capillary electrophoresis, and melting point determination. Capillaries of glass or silica are used in gas chromatography columns. The term also refers to the narrow passages in porous materials.
Formula & Notation
Other Names / Synonyms: Capillary tube, hair-like tube, capillary column (chromatography)
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
A capillary is a very narrow tube, typically with an internal diameter of less than 1 mm, used in chemistry for capillary action, capillary electrophoresis, and melting point determination. Capillaries of glass or silica are used in gas chromatography columns. The term also refers to the narrow passages in porous materials.
Glass capillaries are used in melting-point apparatus, micro-sampling, and blood collection. Capillary columns in GC provide high-resolution separations. Capillary electrophoresis columns separate charged species. Microfluidic devices use capillary channels on a chip scale.
Capillary glass tubes have sharp ends and can cause lacerations. When sealing or cutting capillary tubes, fire-polish or score carefully. Capillaries containing toxic samples should be sealed and disposed of as sharps waste.
The formula or notation for Capillary is: h = 2γ cosθ / (ρgr)