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

In flame on platinum wire____ With borax bead on platinum wire.

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

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

Microcosmic Salt dissolves oxide of copper in the flame of oxidation to a green bead, not so intensely colored as 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

With borax bead it reacts for iron and sometimes for manganese.

From The Elements of Blowpipe Analysis by Getman, Frederick Hutton