Nickel-Plated Sampler Cones Last Longer

Significance of the Topic

In inductively coupled plasma mass spectrometry (ICP-MS), the interface cones play a pivotal role in maintaining sensitivity and stability. Copper-based cones are prone to corrosion when exposed to strong acid matrices, leading to decreased analytical performance, frequent maintenance, and increased downtime. Implementing corrosion-resistant materials can significantly improve operational efficiency in laboratories handling food, environmental, or other aggressive sample types.

Objectives and Study Overview

This work compares nickel-plated sampler cones against standard platinum-tipped cones with a copper base under challenging conditions. Using a 10 % aqua regia matrix over extended run times, the study assesses cone lifetime, cleaning frequency, and overall analytical robustness to demonstrate the advantages of nickel plating.

Methodology and Instrumentation

Testing was conducted on Agilent 7700, 7800, 7900 single-quadrupole and 8800, 8900 triple-quadrupole ICP-MS systems. Cones evaluated included a platinum-tipped nickel-plated model and a platinum-tipped copper-based reference. Samples were prepared in 10 % aqua regia and run for over 1 000 hours. Cleaning protocols involved ultrasonic water baths and, for the reference cones, additional acidic cleaning with Citranox.

Main Results and Discussion

Nickel-plated cones demonstrated more than twice the operational lifetime compared to copper-based cones. Cleaning requirements dropped by a factor of three, and a simplified one-step water sonication process was sufficient for restoration. Visual inspection confirmed minimal corrosion on nickel-plated cones, whereas copper bases on standard cones exhibited significant oxide buildup and material loss.

Benefits and Practical Applications

• Extended cone lifespan reduces replacement costs and instrument downtime.
• Streamlined cleaning routines save technician time and lower maintenance complexity.
• Consistent analytical performance supports reliable quantification in demanding matrices.

Future Trends and Possibilities

Advancements may include exploring alternative coatings or composite materials for even greater durability. Integration of automated maintenance systems and real-time corrosion monitoring could further enhance uptime. Sustainable manufacturing and recycling of worn cones may also become priorities in green laboratory initiatives.

Conclusion

Nickel-plated sampler cones offer a robust solution to acid-induced corrosion in ICP-MS applications, delivering longer lifetimes, reduced maintenance cycles, and stable analytical results. Their adoption can lead to significant workflow improvements in laboratories handling aggressive sample matrices.

Reference

• Agilent Technologies, Inc. (2019). Nickel-plated sampler cones extend cone lifetime and reduce maintenance. Publication 5994-1524EN.