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flame test |
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flame testIn chemistry, the use of a flame to identify metal cations present in a solid. A nichrome or platinum wire is moistened with acid, dipped in a compound of the element, either powdered or in solution, and then held in a hot non-luminous flame. The colour produced in the flame is characteristic of metals present; for example, sodium burns with an orange-yellow flame, and potassium with a lilac one. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Properties include low specific gravity; no degradation of physical properties of base polymer; long-term thermal and uv protection; non-yellowing and non-blooming; no heavy metals; no forming of dioxins when heated or incinerated; passing UL, MVSS-302 and NFPA flame tests when properly formulated. The flame tests of VW-1, horizontal and vertical, are two of the most commonly used flame tests for wire and cable products. On its own, it is rated UL 94V-0, and composites made with it reportedly can easily pass E162, E662, and BSS 7239 flame tests. |
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