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 color characteristic of nickel.

From The Elements of Blowpipe Analysis by Frederick Hutton Getman

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

In borax bead gives usual indications of iron.

From The Elements of Blowpipe Analysis by Frederick Hutton Getman

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 Frederick Hutton Getman

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