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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 |
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(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 |
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| Minimum Resistivity |
16.66 |
1.0 |
1.0 |
0.2 |
| Megohm/cm |
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| PH |
-- |
-- |
6.2-7.5 |
5.-8. |
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Electronic Grade
Water |
|
Type |
E-I |
E-II |
E-III |
E-IV |
| Resistivity, minimum,
Megohm @
25°C |
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 |
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| 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 |
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|
(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 |
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Ammonia, mg/l as NH3 |
0.3 |
0.3 |
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Calcium, mg/l |
4.0 |
4.0 |
| CO2
mg/l @
25°C |
5.0 |
5.0 |
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Heavy Metals, mg/l as Cu |
1.0 |
1.0 |
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Oxidizable substances as O2 |
0.8 |
0.8 |
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Pyrogens Test |
-- |
Absent by Rabbit |
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