borax bead

American  

noun

Chemistry.

1. a bead of fused borax, used in chemical analysis for the identification of certain metal oxides.

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Example Sentences

See Examples For:

borax bead

In borax bead gives usual indications of iron.

From The Elements of Blowpipe Analysis by Frederick Hutton Getman

This powder should then be fused in the oxidation flame until it mixes with, and is thoroughly dissolved by the borax bead.

From A System of Instruction in the Practical Use of the Blowpipe Being A Graduated Course Of Analysis For The Use Of Students And All Those Engaged In The Examination Of Metallic Combinations by Anonymous

The cobalt will always change the borax bead to the blue you got; the chromium will make the bead emerald green or, in certain kinds of flame, ruby red; etc.

From Common Science by John W. (John Woodside) Ritchie

The arsenides and sulphides, before being examined, should be roasted, and then heated with the borax bead.

From A System of Instruction in the Practical Use of the Blowpipe Being A Graduated Course Of Analysis For The Use Of Students And All Those Engaged In The Examination Of Metallic Combinations by Anonymous

When heated on the borax bead it gives an equally beautiful green, which is, however, rather more inclined to chrome than emerald.

From The Chemistry, Properties and Tests of Precious Stones by John Mastin

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