Inductively coupled plasma lamp. Close-up of the type of lamp used to ionise samples for analysis in various forms of ICP (inductively coupled plasma) spectroscopy. Examples include inductively coupled plasma atomic emission spectroscopy (ICP-AES) and inductively coupled plasma mass spectroscopy (ICP-MS). The elements in the sample are then identified by the electromagnetic radiation emitted or their mass. ICP-AES is sometimes called inductively coupled plasma optical emission spectroscopy (ICP-OES).