2025 Nelsen Corporation Catalog - Catalog - Page 437
High Purity Water Information 17
High Purity Water Loop
FILTERS
EXCHANGERS
FILTERS
POU
CARBON
CATION
ANION
STORAGE
0.45
MICRON
ANION
UV SYSTEM
185nm LAMP
0.20
MICRON
UV SYSTEM
254nm LAMP
Technical & Engineering
DUAL
MEDIA
Laboratory Water Requirement Standards
Because of varying conditions, information is to be used as a guideline only.
(ACS) American Chemical Society
(ASTM) American Society for Testing & Materials
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
CFU/ml
Type I Type IIA Type IIB Type III
< 10.00
10.0
1000
N/A
Resistivity
megohms/cm
Particulate
matter
Organics Act.
10.00
1.0
1.0
0.1
0.22
N/A
N/A
N/A
Carbon
N/A
N/A
N/A
(USP) United States Pharmacopoeia XXI Standards
USP Purified
Water for
Injection
Chloride, mg/l
2.0
2.0
Total solids, mg/l
Micro-organisms
10
—
5 –7
5.0
0.3
4.0
5.0
10
—
Maximum per 100
ml
5 -7
4.0
0.3
4.0
5.0
1.0
1.0
0.8
0.8
—-
Absent by Rabbit
Type
pH
Sulfates, mg/l as SO4
Ammonia, mg/l as NH3
Calcium, mg/l
CO2 mg/l @ 25°C
Heavy Metals, mg/l as
Cu
Oxidizable substances
as O2
Pyrogens Test
Type
Max.
Conductivity
Micromhos-cm
Minimum
Resistivity
Megohm/cm
pH
Type
Resistivity,
minimum,
Megohm @ 25°C
Copper*
Chloride*
Dissolved gases*
Potassium*
SiO2 (total)*
Sodium*
Total solids*
Fixed solids
(inorganic)*
Volatile solids
(organic)*
Zinc*
Particle count
(>1 micron),
Maximum/ml
Micro-organisms,
Maximum/ 100ml
Total organic
carbon*
Note: *mg/l
Laboratory Grade Water
Type I
Type II
Type III
0.06
1.0
1.0
5.0
16.66
1.0
1.0
0.2
—
—
6.2–7.5
Electronic Grade Water
E-I
E-II
E-III
5. - 8.
E-IV
17
10.0
1
0.1
0.002
0.020
0.010
0.001
0.001
0.001
0.050
0.01
0.20
0.10
0.01
0.01
0.01
0.50
0.1
2.0
0.5
0.1
0.1
0.1
5.0
1.0
20.0
0.5
1.0
1.0
1.0
50.0
0.010
0.10
1.0
10.0
0.04
0.40
4.0
40.0
0.001
0.01
0.1
1.0
2
10
100
500
1
10
100
100
0.075
0.50
1.0
2.0
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Type IV
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