.
 Applied Membranes | Purchase Online |  Q & A | Technical Articles | Design Information | Search

High Purity Water Standards


Because of varying conditions, information is to be used as a guideline only.

LABORATORY WATER REQUIREMENT STANDARDS

(ACS) American Chemical Society

Specific resistance.....Not less than 0.5 megohm/cm

Silicate (as SiO2)...............Not more than 0.01 ppm

Heavy metals (e.g. Pb).......Not more than 0.01 ppm

 

(NCCLS) National Committee for Clinical Laboratory Standards

Characteristics

Type I Type IIA Type IIB Type III
CFU/ml <10.00 10.0 1000 N/A
Resistivity megohms/cm 10.00 1.0 1.0 0.1
Particulate matter 0.22 N/A N/A N/A
Organics Act. Carbon N/A N/A N/A

 

(ASTM) American Society for Testing and Materials

Laboratory Grade Water

Type

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        
PH -- -- 6.2-7.5 5.-8.

Electronic Grade Water

Type

E-I E-II E-III E-IV
Resistivity, minimum, Megohm @ 25C 17 10.0 1 0.1
Copper* 0.002 0.01 0.1 1.0
Chloride* 0.020 0.20 2.0 20.0
Dissolved gases* 0.010 0.10 0.5 0.5
Potassium* 0.001 0.01 0.1 1.0
SiO2 (total)* 0.001 0.01 0.1 1.0
Sodium* 0.001 0.01 0.1 1.0
Total solids* 0.050 0.50 5.0 50.0
Fixed solids (inorganic)* 0.010 0.10 1.0 10.0
Volatile solids (organic)* 0.04 0.40 4.0 40.0
Zinc* 0.001 0.01 0.1 1.0
Note:*mg/l        
Particle count (>1 micron), Maximum/ml 2 10 100 500
Micro-organisms, Maximum/100ml 1 10 100 100
Total organic carbon* 0.075 0.50 1.0 2.0
Note:*mg/l        

 

(USP) United States Pharmacopoeia XXI Standards

Type

USP Purified Water for Injection
Chloride, mg/l 2.0 2.0
Total solids, mg/l 10 10
Micro-organisms, maximum per 100 ml -- --
PH 5.-7. 5.-7.
Sulfates, mg/l as SO4 5.0 4.0
Ammonia, mg/l as NH3 0.3 0.3
Calcium, mg/l 4.0 4.0
CO2 mg/l @ 25C 5.0 5.0
Heavy Metals, mg/l as Cu 1.0 1.0
Oxidizable substances as O2 0.8 0.8
Pyrogens Test -- Absent by Rabbit

 

 
Back Home Up

 Determining SDI What's Nanofiltration What's Ultrafiltration Membrane Rejection Levels Temperature Correction Pressure Correction Concentrate Recycle Membrane Spectrum Membrane Design 14 Factors for RO Design Water Quality Info Reverse Osmosis Basics Problems with Chloramines and Higher pH Nitrate Removal Ion Exchange Ozone High Purity Water

Applied Membranes Product Selection Links:
[Reverse Osmosis Membranes] [Reverse Osmosis Systems][Home RO Systems][Seawater Desalination Reverse Osmosis Systems] [Media Filters, Carbon Filters, Water Softeners, Etc.] [RO Filters & Housings] [RO Membrane Housings/Pressure Vessels] [Residential RO Components] [Commercial RO Components] [RO Pumps] [Membrane Chemicals] [Ultravioloet (UV) Systems] [Ozone][Water Quality Testers  (SDI)]

 

All Content on this site is  intended for informational purposes for experienced water treatment professionals only.  Applied Membranes, Inc. does not assume any liability for any damages caused by the misapplication or misinterpretation of any of the information contained on this website.
Applied Membranes, Inc. 2007