Heavy metals contamination in cannabis can be dangerous. And most often, metals come from contaminated soil, water, or vaporizor pens. If contaminated with heavy metals, these toxic elements will be passed into the plant and on to the consumer. EVIO Labs uses Inductively Coupled Plasma Mass Spectrometry (ICP/MS) to screen samples for lead (Pb), arsenic (As), cadmium (Cd), and mercury (Hg). This extremely sensitive technique allows you to rest assured that the levels present in your product are at safe levels.