"Inductively Coupled Plasma-Optical Emission spectroscopy" (ICP-OES) often also called ICP-AES (Inductively Coupled Plasma-Atomic Emission spectroscopy) is an atomic spectrometric detection technique used for the quantitative determination of elemental concentrations. The technique is using the Inductively coupled plasma (ICP) as an atomizer and excitation source, that due to its very high temperature in the range of 7000-8000K efficiently desolvates, vaporizes, excites, and atomizes samples introduced as gases, vapors or aerosols. 

The term "ICP-OES" was found in the following pages:

New method for the determination of hexavalent chromium in anti-corrosion coatings | EVISA's News
Component database: AHF analysentechnik AG - ICP spraychambers
Component database: Savillex Corporation - CF-1-005-01-00 C-Flow Nebulizer Assembly, 50ÁL
Instrument database: Varian Inc. - 710-ES Inductively Coupled Plasma-Optical Emission Spectrometers (ICP-OES)
Component database: AHF analysentechnik AG - ICP torches
Anwendertreffen Plasmaspektrometrie 2016 | EVISA's Agenda of Events
Component database: Varian Inc. - Sturman-Masters spraychamber
Instrument database: Varian Inc. (Part A) - VGA-77 Vapor generation accessory
Instrument database: Varian Inc. (Part A) - SPS3 Autosampler
Instrument database: Agilent Technologies Inc. - 7500ce ICP-MS
Instrument database: Elemental Scientific Inc. (ESI) - PC3-SSI Peltier cooled Spraychamber
Component database: Precision Glassblowing Inc. - ICP Nebulizers
Instrument database: Bruker Nano GmbH - S2 PICOFOX
Component database: Elemental Scientific Inc. (ESI) - ICP Torches
Company database: Thermo Scientific
Speciation matters even if the interest is in total element concentration | EVISA's News
Instrument database: Perkin-Elmer Corp. - Model 5500
Instrument database: Teledyne CETAC Technologies - Solis-500 Solids Introduction System
Instrument database: SPECTRO Analytical Instruments Inc. - CIROS VISION - ICP-OES Spectrometer
Instrument database: PerkinElmer Inc. - AS-93plus Autosampler