Whether you need USP Purified Water, WFI, or high purity
water, Culligan Water can provide the water technologies and services that meet
your water requirements. Several standards-setting organizations publish
standards governing ultrapure water purity. Examples include USP, ASTM, CAP,
NCCLS, ANSI and AAMI. Our systems incorporate such technologies as reverse
osmosis, deionization, ultrafiltration, ultraviolet systems and absolute
One need of all laboratories is pure water. Without the
proper conditions, tests can be contaminated by particulates in the source
water. We understand laboratories special needs and concerns regarding the high
purity of their water source.
Water quality guidelines for purified water have been established by a number of
professional organizations, including the American Chemical Society (ACS), the
American Society for Testing and Materials (ASTM), the National Committee for
Clinical Laboratory Standards (NCCLS) which is now CLSI, and the U.S.
Pharmacopeia (USP). The ASTM, NCCLS, and ISO 3696 classify purified water into
Types I-III depending upon the level of purity. These organizations have
similar, although not identical parameters for Type I-III water.
Regardless of which organization's water quality norm is
used, even Type I water may require further purification depending upon the
specific laboratory application. For example, water that is being used for
molecular biology experiments needs to be DNase or RNase-free, which requires
special additional treatment or functional testing. Water for microbiology
experiments needs to be completely sterile, which is usually accomplished by
autoclaving. Water used to analyze trace metals may require elimination of trace
metals to a standard beyond that of the Type I water norm.
The highest grades of ultrapure water should not be stored
in glass or plastic containers because these container materials leach (release)
contaminants at very low concentrations. Storage vessels made of silica are used
for less demanding applications and vessels of ultrapure tin are used for the
highest purity applications.
Ultrapure Water Treatment Applications
- Medical devices
Commercial Water Filters and Water Treatment
Solutions for Missoula, Montana;
Fort Collins, Colorado; Brighton, Colorado; Denver,
Colorado, and across the United States of America.