Agilent ICP-MS Journal (January 2019. Issue 75)

Importance of the Topic

Reliable and high-throughput elemental and radionuclide analysis in water is essential for environmental monitoring, regulatory compliance, and public health protection. ICP-MS offers the sensitivity and versatility required for multi-element analysis at trace levels, but conventional method development and instrument optimization can be time-consuming and complex.

Aims and Overview

This issue of the Agilent ICP-MS Journal presents a comprehensive approach to simplify routine water analysis using ICP-MS, optimize hardware configurations for improved robustness and cost efficiency, address new ISO regulations for ultratrace radionuclides, and streamline software maintenance. The goal is to accelerate implementation, reduce downtime, and ensure consistent, high-quality results in commercial and regulatory laboratories.

Methodology and Instrumentation

• Prevalidated water analysis methods conforming to EPA Method 200.8 and ISO 17294-2:2016 are delivered with supporting SOPs and training packages. • Agilent 7800 ICP-MS equipped with High Matrix Introduction (HMI) for aerosol dilution, helium collision cell (ORS) in single-gas mode, and wide dynamic range detector for simultaneous major and trace determinations. • Agilent 8900 ICP-QQQ employing MS/MS with O₂ reaction gas to mass shift and resolve ²³⁷Np from ²³⁸U tailing, achieving sub-ppt detection limits. • Browser-based ICP Go software for simplified data acquisition and ISIS 3 discrete sampling for increased throughput. • MassHunter software maintenance via SubscribeNet for timely updates and unlimited technical support.

Main Results and Discussion

• Pretested methods and turnkey hardware reduced method setup time by several weeks compared to in-house development. • Optimized nebulizer flow, injector diameter, RF power, and plasma gas settings enhanced matrix tolerance and stability, minimizing drift and maintenance. • ICP-QQQ MS/MS demonstrated abundance sensitivity sufficient to quantify ²³⁷Np at 0.56 pg/L in a 10 mg/L U matrix. • ICP Go interface enabled user training within one day and improved staffing flexibility in high-throughput labs.

Practical Benefits and Applications

• Accelerated instrument deployment and method validation in regulated water analysis laboratories. • Reduced calibration failures, fewer reruns, and lower operating costs through improved robustness and dynamic range. • Accurate ultratrace radionuclide monitoring supports ISO 20899 compliance for plutonium and neptunium in drinking and environmental waters.

Future Trends and Opportunities

• Expansion of preconfigured methods to additional regulated matrices and emerging contaminants. • Integration of automated sample introduction systems and advanced data analytics for real-time monitoring. • Adoption of MS/MS workflows in broader applications such as food authenticity, clinical research, and industrial QA/QC.

Conclusion

Agilent’s integrated ICP-MS solutions—combining optimized hardware, prevalidated methods, user-friendly software, and comprehensive support—enable laboratories to achieve reliable, cost-effective water and radionuclide analysis with minimal downtime and rapid return on investment.

Reference

1. U.S. EPA Method 200.8, Revision 5.4 (1994). 2. ISO 17294-2:2016 Water Quality – ICP-MS for Selected Elements. 3. ISO 20899:2018 Plutonium and Neptunium Test Method Using ICP-MS.