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

Substances containing chromium impart a green colour to the borax bead in both flames.

From A Text-book of Assaying: For the Use of Those Connected with Mines. by Beringer, Cornelius

This globule may be examined for iron, cobalt, and nickel with the borax bead.

From The Elements of Blowpipe Analysis by Getman, Frederick Hutton

In borax bead it slowly dissolves to a clear transparent glass, which is a beautiful green when cool.

From The Elements of Blowpipe Analysis by Getman, Frederick Hutton

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 borax bead, in the reduction flame, is grey, turbid, or completely opaque from the reduced metallic particles.

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