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Chlorine test: Difference between revisions
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Burn copper wire with a torch until green flame stops. Continue heating copper wire red hot. Jab still-hot copper wire into sample piece away from flame (below flame works best). If green smoke or flame ensues, there is chlorine in the piece and it cannot be used inside the laser cutter. | Burn copper wire with a torch until green flame stops. Continue heating copper wire red hot. Jab still-hot copper wire into sample piece away from flame (below flame works best). If green smoke or flame ensues, there is chlorine in the piece and it cannot be used inside the laser cutter. | ||
=The Beilstein Test: Screening Organic and Polymeric Materials for the Presence of Chlorine, with Examples of Products Tested | ==Introduction== | ||
The Beilstein Test: Screening Organic and Polymeric Materials for the Presence of Chlorine, with Examples of Products Tested | |||
http://www.cci-icc.gc.ca/publications/notes/17-1-eng.aspx | http://www.cci-icc.gc.ca/publications/notes/17-1-eng.aspx | ||
http://www.cci-icc.gc.ca/publications/notes/17-1_e.pdf | http://www.cci-icc.gc.ca/publications/notes/17-1_e.pdf | ||
Chlorinated organic materials are generally considered unsuitable for long-term conservation and museum applications due to their potential harm to objects. These materials may degrade and produce acidic gases, or additives such as plasticizers may migrate to objects. These products can be analyzed in detail in the laboratory, but conservators may use a simple test — the Beilstein Test — to screen their own materials for the presence of chlorine without having to submit samples for laboratory analysis. | Chlorinated organic materials are generally considered unsuitable for long-term conservation and museum applications due to their potential harm to objects. These materials may degrade and produce acidic gases, or additives such as plasticizers may migrate to objects. These products can be analyzed in detail in the laboratory, but conservators may use a simple test — the Beilstein Test — to screen their own materials for the presence of chlorine without having to submit samples for laboratory analysis. | ||