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The bead is allowed to cool and then wetted and dipped into the sample to be tested such that only a tiny amount of the substance adheres to the bead. If too much substance is used, the bead will become dark and opaque. The bead and adhering substance is then heated in the lower,
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wire and heated in a Bunsen burner flame until red hot. A stick made of another inert substance such as a magnesia stick (MgO) may also be used. It is then dipped into powdered
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35:
87:
137:. After the test, the bead is removed by heating it to fusion point, and plunging it into a vessel of water.
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106:, part of the flame, allowed to cool, and the colour observed. It is then heated in the upper,
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and then shrinks, forming a colourless, transparent glass-like bead (a mixture of
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and held in the hottest part of the flame where it swells up as it loses its
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Vogel's
Textbook of Macro and Semimicro Qualitative Inorganic Analysis
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134:
130:
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110:, part of the flame, allowed to cool, and the colour observed again.
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to test for the presence of certain metals. The oldest one is the
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Characteristic coloured beads are produced with salts of
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578:Materials Handbook: A Concise Desktop Reference
50:in 1812. Since then other salts were used as
8:
139:
62:. The most important one after borax is
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27:Test for the presence of certain metals
628:CRC Handbook of Chemistry and Physics
595:Vogel, Arthur I.; Svehla, G. (1979),
78:A small loop is made in the end of a
7:
413:yellow, opaque (hot) violet (cold)
384:yellow-brown (hot and cold), opaque
345:yellow-brown (hot and cold), opaque
306:yellow-brown (hot and cold), opaque
203:colorless, yellow or brownish (hot)
25:
603:(5th ed.), London: Longman,
410:colourless (hot and cold), opaque
319:colourless (hot and cold), opaque
540:colourless(hot and cold), opaque
527:colourless(hot and cold), opaque
514:colourless(hot and cold), opaque
501:colourless(hot and cold), opaque
488:colourless(hot and cold), opaque
475:colourless(hot and cold), opaque
462:colourless(hot and cold), opaque
449:colourless(hot and cold), opaque
436:colourless(hot and cold), opaque
423:colourless(hot and cold), opaque
397:colourless(hot and cold), opaque
371:colourless(hot and cold), opaque
332:colourless(hot and cold), opaque
293:deep blue (hot and cold), opaque
178:colorless, yellow or brown (hot)
165:colorless (hot and cold), opaque
254:sky blue (hot and cold), opaque
36:qualitative inorganic analysis
1:
267:yellow (hot and cold), opaque
358:green (hot and cold), opaque
66:, which is the basis of the
280:pink (hot and cold), opaque
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68:microcosmic salt bead test
244:colorless (hot and cold)
34:is a traditional part of
452:yellow or brown, opaque
88:water of crystallization
46:. It was introduced by
580:, François Cardarelli
270:bottle-green, opaque
630:. CRC Press. 1985.
543:colourless, opaque
530:colourless, opaque
517:colourless, opaque
504:colourless, opaque
491:colourless, opaque
478:colourless, opaque
465:colourless, opaque
439:colourless, opaque
400:colourless, opaque
652:"Borax Bead Tests"
296:deep blue, opaque
283:colorless, opaque
168:colorless, opaque
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92:sodium metaborate
16:(Redirected from
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615:Internet Archive
613:– via the
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219:gray and opaque
206:gray and opaque
181:gray and opaque
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64:microcosmic salt
56:sodium carbonate
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149:Oxidizing flame
96:boric anhydride
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60:sodium fluoride
40:borax bead test
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18:Borax bead test
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510:Praseodymium
257:red, opaque
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44:blister test
43:
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562:References
556:Flame test
445:Molybdenum
74:Borax bead
54:, such as
536:Germanium
497:Neodymium
458:Strontium
432:Magnesium
276:Manganese
241:red (hot)
229:colorless
216:colorless
191:colorless
127:manganese
108:oxidizing
48:Berzelius
32:bead test
666:Category
550:See also
419:Tungsten
406:Titanium
367:Platinum
354:Chromium
328:Vanadium
174:Antimony
161:Aluminum
123:chromium
104:reducing
80:platinum
523:Silicon
484:Yttrium
471:Thorium
341:Uranium
225:Calcium
212:Cadmium
199:Bismuth
634:
607:
315:Silver
302:Nickel
289:Cobalt
250:Copper
237:Cerium
187:Barium
135:nickel
131:cobalt
115:copper
144:Metal
84:borax
632:ISBN
605:ISBN
380:Gold
263:Iron
133:and
119:iron
94:and
30:The
393:Tin
98:).
58:or
42:or
668::
587:^
570:^
129:,
125:,
121:,
117:,
70:.
654:.
640:.
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.