I'm no expert, but there's a lot of misinformation around this point. Apparently there is no 100% reliable test apart from spectrometry. https://www.youtube.co

I'm no expert, but there's a lot of misinformation around this point. Apparently there is no 100% reliable test apart from spectrometry. https://www.youtube.com/watch?v=WE51TMRJn8U https://www.youtube.com/watch?v=WE51TMRJn8U