Re: water question
Here are the current water standards for CAP and ASTM for Laboratories.
Regards,
J.Cannon
e-purewater.com
Water Standards
NCCLS/CAP
Specifications for Reagent Water Type I Type IIA Type IIB
Type III
Maximum bacterial content,
colony forming units per mL (CFU/mL) <10.00 10 1000
N/A
Minimum resistivity (Mohm-cm @ 25 °C) 10 1.0 1.0
0.1
Maximum silicate, mg/L SiO2 0.05 0.1
Particulate matter 0.22 micron filter N/A N/A
N/A
Organic contaminants Activated carbon(1) N/A N/A
N/A
N/A. = Not Applicable
(1) Not required by CAP
ASTM
Laboratory Grade Water Type I Type II Type III
Type IV
Max. Conductivity 0.06 1.0 1.0
5.0
Micromhos/cm
Minimum resistivity 16.66 1.0 1.0
0.2
(Megohm/cm @ 25 °C)
pH – – 6.2-7.5 5.-8.
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