Millipore has developed a range of Milli-Q ultrapure water systems designed to match specific water quality requirements. Each of the five new Milli-Q systems is designed to specifically target contaminants detrimental to particular applications such as HPLC, molecular biology and ICP-MS. The systems incorporate a high precision resistivity monitor that records conductivity or resistivity (compensated or not to 25 °C), and also feature a built-in TOC monitor with a 1-999 ppb detection range for accurate analysis of organics. Milli-Q systems meet USP 24 requirements for resistivity and TOC suitability tests. Validation and qualification services are available, and the optional Explore Data software allows easy access to historical data via a computer interface for documenting GLP compliance. All systems can be bench-operated, wall-mounted or bench-integrated for maximizing space requirements.

All systems in the Milli-Q range employ a 3-step purification process:

• Step 1: Plug-in Q-Gard purification packs are tailored to the feedwater source to optimize the performance of downstream purification media to ensure consistent results.
• Step 2: Quantum application-specific cartridges remove ionic and organic contaminants down to trace levels.

• Step 3: Final purification of ultrapure water is carried out at the point-of-use by a pharmaceutical-grade, absolute 0.22um Millipak membrane filter that is recommended for most analytical applications.