What does reliable ICP-OES analysis actually depend on? In most cases, ICP-OES is a well-established technique. The difference in ICP-OES analysis results doesn’t usually come from the instrument itself, but from how the analysis is set up, controlled, and maintained within the laboratory. For organisations relying on this ICP-OES data, whether for quality control or compliance, consistency matters just as much as accuracy. Why the choice of ICP analytical laboratory matters