Performance of the PFA Cyclonic Spray Chamber for ICP-MS

Significance of the topic

Reliable sample introduction is fundamental in ICP-MS, where signal stability and sensitivity directly affect detection limits and data quality. Inert spray chambers must minimize droplet formation, re-nebulization, and memory effects to support trace and ultratrace analyses in environmental, semiconductor, and industrial applications.

Objectives and article overview

This technical note aimed to evaluate the performance of Savillex’s PFA cyclonic spray chamber (CSC) in untreated and surface-treated forms, comparing them to a competitor’s PFA cyclonic design (PFA Cyclonic A). The focus was on short-term signal precision, sensitivity across a multi-element tune, and oxide/doubly-charged species formation under identical operating conditions.

Methodology and instrumentation

All tests used a Savillex C400d PFA concentric nebulizer at 350 µL/min, connected via glass elbow and 12/5 ball connectors to a standard quartz torch on an ICP-MS. Spray chambers operated at ambient temperature (19 °C) without cooling. A 10 ppb multielement tune solution was analyzed with 100 replicates, 1 sec integration per mass, over a 650 sec run.

Results and discussion

Comparative data revealed:

• Signal precision (RSD): Both untreated and treated Savillex CSCs achieved RSDs ~1.0–2.0 %, outperforming ~3.0–5.6 % for PFA Cyclonic A across Li, Co, Y, Ce, and Tl masses.
• Sensitivity: The untreated CSC delivered 10–20 % higher counts than Cyclonic A; the treated CSC showed ~60 % higher sensitivity, matching glass/quartz cyclonic levels.
• Oxide and doubly charged ratios: Both Savillex CSCs maintained low CeO/Ce and Ce2+/Ce signals, indicating minimal polyatomic and doubly charged interferences.

The proprietary surface treatment enhances wettability, reducing droplet adhesion on sidewalls and improving aerosol transmission. Key design elements—molded deep spoiler, conical nebulizer port insert, and baffle-tip drain guide—prevent large droplet accumulation and re-nebulization, yielding exceptional signal stability.

Benefits and practical applications

Advantages of Savillex PFA CSC include:

• Superior signal stability and precision for routine and ultratrace ICP-MS analyses.
• Enhanced sensitivity comparable to glass/quartz chambers without sacrificing chemical inertness.
• Visual monitoring through translucent walls and reproducible manufacturing via stretch blow molding.
• Flexibility: untreated version recommended for ultratrace semiconductors; treated version for maximum sensitivity in ICP-MS and ICP-OES.

Future trends and possibilities

Ongoing developments may explore novel surface chemistries to further improve wettability, integration of active temperature control for extended runs, and custom chamber geometries to optimize performance for emerging high-matrix or high-throughput applications. Real-time monitoring of droplet behavior and automated cleaning protocols could further enhance measurement reliability.

Conclusion

Savillex’s stretch blow molding approach produces a PFA cyclonic spray chamber that surpasses conventional inert designs in stability and sensitivity. Surface treatment brings performance on par with glass/quartz cyclonics while maintaining chemical resistance. These features make the PFA CSC a versatile choice for demanding ICP-MS and ICP-OES analyses.

Reference

• Savillex Technical Note TN014 010514: Performance of the PFA Cyclonic Spray Chamber for ICP-MS.