PFA Cyclonic Spray Chamber for ICP-OES and ICP-MS

Importance of the Topic

The design and material of spray chambers in ICP-OES and ICP-MS significantly affect analytical performance, including sensitivity, stability, and washout. The introduction of a PFA cyclonic spray chamber using stretch blow molding addresses common limitations of machined inert chambers, offering enhanced visibility, optimized internal geometry, and improved trace metal background.

Study Objectives and Overview

This study presents the development and evaluation of the Savillex PFA cyclonic spray chamber (CSC) for ICP-OES and ICP-MS. Key aims include replicating the performance of glass/quartz cyclones in an inert material, enabling modular use across instruments, and illustrating the benefits of surface treatments on sensitivity.

Methodology and Instrumentation

The PFA CSC, nominal volume 50 mL, is produced via stretch blow molding, resulting in thin translucent walls and a smooth surface. The chamber integrates a molded spoiler for directed droplet drainage and interchangeable exit ports with or without baffles. A PFA insert around the nebulizer tip minimizes dead volume. Surface wettability was modified using an organic-based treatment to reduce contact angle from 110° to approximately 60°.

Used Instrumentation

• ICP-OES systems with 12/5 socket connectors
• ICP-MS instruments compatible with exit ports featuring twin gas lines
• Savillex C-Flow nebulizer range

Main Results and Discussion

The untreated PFA CSC demonstrated excellent signal stability and low background. The treated version increased sensitivity by about 40%, matching top-performing glass or quartz cyclonic chambers in ICP-MS. The optimized internal design effectively prevents large droplet formation and re-nebulization, improving washout and aerosol transport.

Advantages and Practical Applications

• Modular compatibility across multiple ICP platforms
• Visual inspection during operation due to translucent walls
• Enhanced washout and reduced contamination from carryover
• High chemical inertness for ultratrace analysis in semiconductor and environmental testing

Future Trends and Potentials

Advancements may include further surface treatments to tailor wettability, integration with automated nebulizer systems, and customization for emerging microplasma and miniaturized ICP devices. Continued material innovations could yield chambers with even lower background and improved thermal stability.

Conclusion

The Savillex PFA CSC leverages stretch blow molding to deliver a robust, inert, and high-performance alternative to traditional glass/quartz chambers. Its modular design, combined with optional surface treatment, meets diverse analytical needs and supports both ultratrace and high-sensitivity applications.