 and compare the concentrations by tampon characteristics. I guess maybe somewhere there's a rating of your tampon brand. They use mass spec. W-I-N-T. Arsenic, barium, calcium, cadmium, cobalt, chromium, copper, iron, manganese, mercury, nickel, lead, selenium, strontium, vanadium, and zinc. And by the way, some of these things are not harmful, like zinc. Massive amounts, not a problem. But there's some baddies here. Cadmium.