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https://www.instructables.com/community/Request-How-can-I-test-jewelry-components-for-lea/
Lead (II) cations and the sulphide anions react to form the insoluble Lead sulphide which is a distinctive brown solid. If you only need to test qualitatively for the presence of lead on the surface of an object, a cotton swap dipped in distilled water wiped across the surface should turn brown when sodium sulphide solution is dropped onto it.
http://www.skyrayxrf.com/test-for-lead.php
X-Ray Fluorescence (XRF) is a non-destructive testing method that can read below the parts-per-million (ppm) levels in the various regulations on jewelry. XRF has been proven as an effective screening tool for hazardous substances and is widely accepted as an appropriate …
https://ourpastimes.com/test-pewter-8380973.html
Apr 12, 2017 · Purchase a lead testing kit from the local hardware store. Check the label to ensure the kit is appropriate for testing jewelry and tableware. Combine the chemicals in the lead testing kit following the detailed instructions on the label. Always wear protective gloves when handling lead testing chemicals.
https://dtsc.ca.gov/toxics-in-products/lead-in-jewelry/
Lead has often been used in jewelry, to make the article heavier, brighten colors, and to stabilize or soften plastic. However, lead can be dangerous, even deadly when used in jewelry. The state of California regulates lead in jewelry to help prevent it from harming people.
https://answers.yahoo.com/question/index?qid=20070813210849AAfdjp1
Aug 13, 2007 · Rub the jewelry on a piece of white paper. If the mark left on the white paper is grey in colour, then the jewelry probably contains lead.
https://www.instructables.com/community/How-to-test-jewellery-for-cadmium/
These days a lot of jewellery is testing as containing dangerous levels of lead and cadmium, mostly Chinese imports. How could a consumer test jewellery for cadmium, easily and cheaply at home, please? I can't find anything online about how to test for cadmium.
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