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https://www.instructables.com/community/Request-How-can-I-test-jewelry-components-for-lea/
Potassium iodide might work too; it makes a distinctive yellow precipitate with lead, but it would be much less sensitive. If you actually want to test the metal's lead content, you'd have to dissolve some of it with an acid. Beyond that, you're looking at a significant expense for testing. I think how they typically do lead testing analytically is with a lead ion-selective electrode, or perhaps some sort of complexometric …
https://dtsc.ca.gov/toxics-in-products/lead-in-jewelry/
In response, California’s legislature amended the Lead-Containing Jewelry law (now known as the Metal-Containing Jewelry Law) to restrict not only lead, but also cadmium, in children’s jewelry. Cadmium levels in children’s jewelry must be less than 300 parts per million, by weight. Please see our Cadmium in Children’s Jewelry web page.
https://www.elf925.com/blog/lead-nickel-jewelry-need-know/
Nov 22, 2016 · Does that mean that you should test each and every piece of jewelry you buy wholesale for nickel and lead? No – that’s probably not financially viable. And while in a perfect world we would test each piece of jewelry, in the actual world we live in, that’s simply not a realistic option.
https://www.rings-things.com/Learn/Lead/
These Federal US regulations require a third-party to test children's jewelry for lead content. Some individual states have also passed legislation about restrictions for lead content in children's jewelry. Because Rings & Things' components are not intended for children's jewelry, we do not plan to label our products with additional classifications.
https://www.instructables.com/community/How-to-test-jewellery-for-cadmium/
How to test jewellery for cadmium? Answered. These days a lot of jewellery is testing as containing dangerous levels of lead and cadmium, mostly Chinese imports.
https://ourpastimes.com/test-pewter-8380973.html
Apr 12, 2017 · Testing for Lead 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.
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