Ultrapure Water System with UV and Ultrafiltration

What is the Ultrapure Water System with UV and Ultrafiltration?

An ultrapure water system with UV and ultrafiltration targets maximum organic and microbial control. It is used for LC-MS, cell culture and molecular biology where organic carbon and endotoxin must be minimal.

Overview

This configuration adds both ultraviolet oxidation and ultrafiltration to the standard ultrapure chain. A 185 nanometer lamp oxidizes organics and a 254 nanometer lamp inactivates microorganisms, while a 5,000 to 13,000 dalton ultrafiltration membrane at the point of use removes endotoxins, RNase, DNase, particles and bacteria. Total organic carbon can reach below 2 to 5 parts per billion, and endotoxin can be below 0.001 endotoxin units per milliliter with appropriate handling. The ultrafilter also keeps the dispensed water free of colloids and pyrogens. Because membranes are consumable and can clog, flow and pressure are monitored, and replacement is scheduled. This system suits work where trace organics or biomolecules in the water would compromise sensitive detection or cell health.

How does it work?

An ultrapure water system chains several purification steps to reach Type I quality. Feed, usually reverse osmosis or distilled water, passes through activated carbon to remove organics and chlorine, ion exchange resin to remove ions, a 185 nanometer ultraviolet lamp to oxidize residual organics, a 254 nanometer lamp to inactivate microorganisms, and ultrafiltration or microfiltration to remove particles, bacteria and endotoxins. A final 0.22 micron filter or ultrafiltration membrane polishes the water at the point of use. Resistivity and total organic carbon are monitored continuously, and recirculation keeps the loop fresh. The combination of steps is essential because no single technique removes all contaminant classes, and care in materials, dead volume and loop design prevents the purified water from being re-contaminated before it is dispensed.

What are the key features?

• 185 nm and 254 nm UV lamps for organics and microbes
• Point-of-use ultrafiltration for endotoxin and RNase removal
• Total organic carbon below 2–5 ppb
• Endotoxin below 0.001 EU/mL with proper handling
• Flow and pressure monitoring for membrane condition
• Scheduled membrane replacement

What are the technical specifications?

A typical ultrapure water system with uv and ultrafiltration configuration offers resistivity of 18.2 MΩ·cm at 25 °C, total organic carbon of < 2–5 ppb, endotoxin of < 0.001 EU/mL typical, ultrafiltration cut-off of 5,000–13,000 Da, flow rate of 0.5–2 L/min and UV lamps of 185 nm and 254 nm. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Ultrapure Water System with UV and Ultrafiltration is used in LC-MS and trace organic analysis, cell culture and media preparation, molecular biology and PCR, endotoxin-sensitive assays and proteomics and genomics workflows. Across the wider Ultrapure Water Systems class, laboratories also deploy it for trace metal and ion analysis, HPLC, LC-MS and UHPLC mobile phases and molecular biology and PCR.

Which standards and certifications apply?

Relevant standards and methods include ISO 3696, CLSI GP40, USP <643>, USP <645>, IEC 61010-1 and ISO 9001. Certification candidates for this model are CE, RoHS and ISO 9001 manufacturing; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Maintain the system on the manufacturer's schedule: replace pretreatment and polishing cartridges, and the UV lamps, before performance declines. Keep the recirculation loop short and flowing, because stagnant water allows biofilm to form on wetted surfaces and raises total organic carbon. Sanitize on a defined interval and after any contamination event, and verify with resistivity and microbial testing. Handle the point-of-use filter carefully to avoid contamination, and touch only the connector. Draw water just before use and do not store Type I water for long, since its purity degrades in containers. Follow IEC 61010-1 for electrical safety, and document resistivity, total organic carbon and service dates for traceability.

How do I select the right Ultrapure Water System with UV and Ultrafiltration?

Choose this configuration when the method is sensitive to organic carbon, endotoxin, RNase or bacteria, such as LC-MS, cell culture and PCR. For routine trace analysis without those concerns, a standard ultrapure unit may suffice. In the RFQ, state the critical limit for each contaminant.

How does it compare with other Ultrapure Water Systems variants?

Start from the analytical method, because it determines the required resistivity, total organic carbon, bacterial and endotoxin limits. Trace metals and ion chromatography need low ionic content, LC-MS needs low organic carbon, and cell culture needs low endotoxin and bacteria. Choose a system with the purification steps that meet those requirements, and confirm that resistivity and total organic carbon are monitored, ideally with a calibration option. Size the unit by daily volume and instantaneous flow, and decide whether it should produce Type I only or both Type I and Type II. Consider the feed source, since reverse osmosis feed extends cartridge life compared with tap water. Check the point-of-use dispenser, dead volume, recirculation, sanitization procedure and consumable cost per liter before selecting.