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Complete Systems and replacement filters for most brands.
ASTM Type I II and III Water Specifications 2010
Everything you need to make lab water
New Lab Water Systems
Replacement filters for all brands of existing lab water system
| Type I||Type II||Type III||Type IV|
|Electrical conductivity, max, S/cm||0.056||1.0||0.25||5.0|
|Electrical resistivity, min||18||1.0||4.0||0.2|
|pH||*||*||*|| 5.0 to 8.0|
|Total organic carbon (TOC), max, g/L||50||50||200||no limit|
|Sodium, max, g/L||1||5||10|| 50|
|Chlorides, max, g/L||1||5||10|| 50|
|Total silica, max, g/L||3|| 3||500||no limit|
When bacteria levels need to be controlled, reagent grade types should be further classified as follows:
|Type A|| Type B||Type C|
|Maximum heterotrophic bacteria count||10/1000 mL||10/100 mL||100/10 mL|
|Endotoxin, EU/mlB|| 0.03||0.25||not applicable|
*pH is not a significant indicator when comparing ionic contamination.
Also See :
Measuring pH of pure water
NCCLS and CAP Water Specs
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