UltraPure Water

Water used to prepare all EIA reagents and buffers must be deionized and free of trace organic contaminants ('UltraPure'). Use activated carbon filter cartridges or other organic scavengers. Glass distilled water (even if double distilled), HPLCgrade water, and sterile water (for injections) are not adequate for EIA. This UltraPure water is deionized and free of organic contaminants. It has been purified by reverse osmosis followed by ion exchange and organic scavenging. When bottled, the resistivity of the water was >18 MO and total organic contaminants were <10 ppb. For long term storage we suggest that the water be stored as supplied at room temperature and used before the expiration date listed on the label.