Pure water is essential to every laboratory.
Millipore offers a complete line of water purification systems to meet every lab application. If the conductivity is not greater than the table value, the water meets the requirements of the test. If the conductivity is higher than the table value, proceed with Stage 2. 2. Transfer 100 mL or more of water to a container and agitate with atmospheric CO 2 . If either the measured conductivity is greater than the chart value or the pH is outside the range of 5.0 to 7.0 the water fails the USP purified water requirement.