Re: water question

From:JBCannon73@aol.com

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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