PURELAB® Flex: delivering essential ultra pure water for analytical techniques

Significance of the Topic

High-purity water is critical in analytical chemistry workflows. In techniques such as AAS, HPLC, GC/MS and ICP-OES, trace-level detection demands that solvents and buffers are free from ionic and organic contaminants. Even minute impurities can distort chromatographic separations, elevate background signals or foster microbial growth, compromising data quality and instrument performance.

Study Objectives and Overview

This case study describes the implementation of an ELGA PURELAB Flex water purification system at Olsberg Vocational College in Germany. The primary goals were to:

• Ensure a reliable supply of ultrapure water for teaching laboratories.
• Support a range of instrumental methods in the curriculum.
• Demonstrate ease of use and maintenance to students and staff.

Methodology and Instrumentation

The college installed a two-stage water purification cascade. Feed water is first treated by the PURELAB Option-R module to remove large particulates and reduce ionic load. The treated water then passes through the PURELAB Flex unit, which incorporates:

• Mixed-bed ion exchange resins for resistivity improvement.
• Ultraviolet oxidation to lower total organic carbon (TOC).
• A 0.2 μm point-of-use filter to eliminate particulates and bacteria.

The system delivers up to 2 L/min of ultrapure water directly at the dispenser, facilitating uninterrupted laboratory sessions.

Main Results and Discussion

Since commissioning, the PURELAB Flex consistently produces ultrapure water with conductivity and TOC levels compliant with requirements for advanced analytical techniques. Student and instructor feedback highlights:

• Rapid start-up: water of required quality is available within minutes of powering on.
• Intuitive interface: minimal training needed for routine operation and cartridge replacement.
• Space efficiency: compact footprint fits easily in a busy teaching laboratory.

These factors combine to reduce downtime, streamline lab schedules and reinforce rigorous data quality standards.

Benefits and Practical Applications

Key advantages of deploying PURELAB Flex in an academic setting include:

• Hands-on experience: students gain familiarity with equipment widely used in research and industry.
• Consistent quality: reproducible results across diverse analytical modules.
• Operational reliability: automated alerts and cartridge tracking minimize service interruptions.

In practice, ultrapure water from this system underpins sample preparation, mobile-phase formulation and instrument rinsing, elevating overall laboratory performance.

Future Trends and Opportunities

The continuing evolution of water purification technology is likely to focus on:

• Remote monitoring: cloud-based dashboards for performance analytics and predictive maintenance.
• Modular upgrades: add-on units to target emerging contaminants such as per- and polyfluoroalkyl substances (PFAS).
• Green chemistry integration: energy-efficient UV systems and recyclable resin cartridges.

Academic centers can further benefit by integrating data logging into digital lab notebooks, training students in Good Laboratory Practice and sustainable resource management.

Conclusion

The ELGA PURELAB Flex system at Olsberg Vocational College delivers a robust supply of ultrapure water tailored for advanced analytical methods. Its combination of compact design, high throughput and user-friendly operation supports both teaching objectives and rigorous experimental standards. Adoption of such technology prepares students for modern research environments and promotes reliable, high-quality results.