// Definition
Inductively Coupled Plasma Mass Spectrometry (ICP-MS), an analytical technique that ionizes samples in a plasma torch to detect trace metals by their mass-to-charge ratio and emission intensity. Used in cannabis testing for metals analysis on certificates of analysis (COAs).
// From the Episode
Dr. Mark explained ICP-MS as the method needed to detect potential metal contamination from parchment paper in rosin. He described how the ion coupled plasma 'lights up' any metal present, the intensity indicates concentration, and the mass spec confirms the identity. He noted that a typical cannabis lab charges $80-100 for ICP analysis, and suggested comparing hash vs. rosin samples to look for anomalous metal spikes introduced by the pressing process.