Difference between revisions of "Beilstein test"
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== Description == | == Description == | ||
| − | A flame test used to detect the presence of [ | + | A flame test used to detect the presence of [[halogen|halogens]] in organic compounds. The Beilstein test is commonly used to identify [[polyvinyl chloride]] (PVC). To conduct the test, a piece of [[copper]] wire or copper gauze placed in a flame to burn off impurities. When the flame shows no green, the copper wire is removed and a small piece or drop of the material to be tested is placed on its surface, then metal is returned to the flame. A green flame is a positive result for the presence of a halogen compound. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
| − | + | pyrolysis test for chlorine; Beilsteinprobe (Deut.) | |
| − | == | + | ==Physical and Chemical Properties== |
| − | Fluorine is not detected by this test. | + | * Fluorine is not detected by this test. |
| + | * Fingerprints may give a false positive result. | ||
| − | + | ==Resources and Citations== | |
| − | + | * N.Odegaard, S.Carroll, W.Zimmt, ''Material Characterization Tests for Objects of Art and Archaeology'' Archetype Publications, London, 2000, p. 106. | |
| − | + | * S.Williams, The Beilstein Test: A Simple Test to Screen Organic and Polymeric Materials for the Presence of Chlorine. ''CCI Notes'' No. 17/1, Canadian Conservation Institute, Ottawa, 1989. | |
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* Pam Hatchfield, ''Pollutants in the Museum Environment'', Archetype Press, London, 2002 | * Pam Hatchfield, ''Pollutants in the Museum Environment'', Archetype Press, London, 2002 | ||
Latest revision as of 13:13, 2 May 2022
Description
A flame test used to detect the presence of halogens in organic compounds. The Beilstein test is commonly used to identify Polyvinyl chloride (PVC). To conduct the test, a piece of Copper wire or copper gauze placed in a flame to burn off impurities. When the flame shows no green, the copper wire is removed and a small piece or drop of the material to be tested is placed on its surface, then metal is returned to the flame. A green flame is a positive result for the presence of a halogen compound.
Synonyms and Related Terms
pyrolysis test for chlorine; Beilsteinprobe (Deut.)
Physical and Chemical Properties
- Fluorine is not detected by this test.
- Fingerprints may give a false positive result.
Resources and Citations
- N.Odegaard, S.Carroll, W.Zimmt, Material Characterization Tests for Objects of Art and Archaeology Archetype Publications, London, 2000, p. 106.
- S.Williams, The Beilstein Test: A Simple Test to Screen Organic and Polymeric Materials for the Presence of Chlorine. CCI Notes No. 17/1, Canadian Conservation Institute, Ottawa, 1989.
- Pam Hatchfield, Pollutants in the Museum Environment, Archetype Press, London, 2002
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993