Millipore Water Purification Systems

EMD Millipore direct 8

Water purification System, EMD Millipore Direct 8 produces Type 1 (ultrapure) Water:
Feed Water Nature: Potable Tap Water
Flow Rate: 8 Liters per hour
Product Water Resistivity: Ultrapure Water: 18.2 MegOhm-cm
Product Water TOC: < 5 ppb
Milli-Q Gradient system (with UV lamp) provides product water quality: 18.2 Megaohm-cm @ 25 oC resistivity, and total organic carbon (TOC) of 1-5 ppb. It is equipped with build-in TOC analyzer. This water is used for ICP-MS and IC sample preparations. MilliQ water system-old


Milli-Q Advantage A10t system (with UV lamp) provides product water quality:18.2 Megaohm-cm @ 25 oC resistivity,  total organic carbon (TOC) of <5 ppb and particulates (size > 0.22 µm/ml of <1 particulate/ml). It is equipped with build-in TOC analyzer.

The Milli-Q water is meant for instrument use and direct use in sample preparation.  There are three Milli-Q systems in the York building: labs 119, 213, and 209. Both Milli-Q water and DI water are best when fresh.  Pure water goes bad quickly so it makes no sense to collect bottles and bottles of water so you can have a whole month's supply on hand.


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 feed water 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 0.22 µm Millipak membrane filter.


Additional Purification Steps

UV Photo-oxidation:

The ultraviolet photo-oxidation process (UV at 254 and 185 nm) used in Milli -Q Gradient, Advantage  Systems can effectively carry out the destruction of organic molecules, to reduce TOC levels to < 5 ppb, improving consistency and sensitivity in applications such as HPLC, IC, solid-phase extraction and UV spectroscopy.