Advancing Trace Metal Analysis: Transitioning from Atomic Absorption Spectroscopy to ICP-MS for Enhanced Detection Limits

Presentation Description: Environmental laboratories, particularly in California are increasingly challenged to meet more stringent regulatory requirements (Federal and State) for trace metals analysis in potable and non-potable waters. Traditional Atomic Absorption (AA) spectroscopy, while reliable, often lacks the sensitivity and multi-element capability required for today’s monitoring needs. Inductively Coupled Plasma–Mass Spectrometry (ICP-MS), as described in EPA Method 200.8, has emerged as the preferred technique for achieving lower detection limits, faster throughput, and broader analyte coverage: up to 30 analytes are on the fields of accreditation (FOAs) under EPA 200.8.
The proposed technical session will guide participants through the technical and operational aspects of transitioning from AA-based techniques to ICP-MS using EPA 200.8. The presentation will highlight key differences in performance, method requirements, and data quality objectives, while also addressing common challenges such as matrix interferences, contamination control, and method validation. Case studies from my experience at CVWD will be shared to illustrate improvements in detection capability, efficiency, and regulatory compliance following the adoption of EPA 200.8.
By the end of the session, participants will understand not only the drivers for this transition but also the practical steps and quality assurance (passing proficiency testing, determining and redetermining MDLs, troubleshooting common ICP-MS problems and carrying out basic maintenance) considerations necessary to ensure successful implementation in their own laboratories.