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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 |
Bacterial contamination
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
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*pH is not a significant indicator when comparing ionic contamination.
Also See :
Measuring pH of pure water
NCCLS and CAP Water Specs
ATSM Specs
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