ASTM International - ASTM D1193-99

Standard Specification for Reagent Water

historical
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Organization: ASTM International
Publication Date: 10 February 1999
Status: historical
Page Count: 3
scope:

1.1 This specification covers requirements for water suitable for use in methods of chemical analysis and physical testing. Four grades are specified:

Type IType IIType IIIType IV
Electrical conductivity, max, µS/cm at 298 K (25

oC)

0.0561.00.255.0
Electrical resistivity, min, Mcm at 298 K (25

oC)

181.0 4.00.2
pH at 298 K (25

oC)

A

A

A

5.0 to 8.0
Total organic carbon (TOC), max, µg/L5050200no limit
Sodium, max, µg/L1510 50
Chlorides, max, µg/L1510 50
Total silica, max, µg/L3 3500no limit

Microbiological contamination-When bacterial levels need to be controlled, reagent grade types should be further classified as follows:

Type A Type BType C
Maximum heterotrophic bacteria count10/1000 mL10/100 mL100/10 mL
Endotoxin, EU/ml

B

0.030.25not applicable

AThe measurement of pH in Type I, II, and III reagent waters has been eliminated from this specification because these grades of water do not contain constituents in sufficient quantity to significantly alter the pH.
B EU = Endotoxin Units.

1.2 The method of preparation of the various grades of reagent water determines the limits of impurities and shall be as follows:

1.2.1 Type I grade of reagent water shall be prepared by distillation or other equal process, followed by polishing with a mixed bed of ion exchange materials and a 0.2-µm membrane filter. Feedwater to the final polishing step must have a maximum conductivity of 20 µS/cm at 298K (25oC).

1.2.2 Type II grade of reagent water shall be prepared by distillation using a still designed to produce a distillate having a conductivity of less than 1.0 µS/cm at 298 K (25oC). Ion exchange, distillation, or reverse osmosis and organic adsorption may be required prior to distillation if the purity cannot be attained by single distillation.

Note 1-Because distillation is a process commonly relied upon to produce high purity water, the levels specified for Type II reagent water were selected to represent the minimum quality of water that a distillation process should produce.

1.2.3 Type III grade of reagent water shall be prepared by distillation, ion exchange, continuous electrodeionization reverse osmosis, or a combination thereof, followed by polishing with a 0.45-µm membrane filter.

1.2.4 Type IV grade of reagent water may be prepared by distillation, ion exchange, continuous electrodeionization reverse osmosis, electrodialysis, or a combination thereof.

1.3 The choice of one of the various grades may be designated by the method or by the investigator.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Document History

March 15, 2018
Standard Specification for Reagent Water
1.1 This specification describes the required characteristics of waters deemed suitable for use with the standards under the jurisdiction of ASTM. 1.2 The alphanumeric characters ascribed to water...
May 1, 2011
Standard Specification for Reagent Water
1.1 This specification describes the required characteristics of waters deemed suitable for use with the Standards under the jurisdiction of ASTM. 1.2 The alphanumeric characters ascribed to water...
March 1, 2006
Standard Specification for Reagent Water
1.1 This specification describes the required characteristics of waters deemed suitable for use with the Standards under the jurisdiction of ASTM. 1.2 The alphanumeric characters ascribed to water...
ASTM D1193-99
February 10, 1999
Standard Specification for Reagent Water
1.1 This specification covers requirements for water suitable for use in methods of chemical analysis and physical testing. Four grades are specified: Type I Type II Type III Type IV Electrical...
February 10, 1999
Standard Specification for Reagent Water
1.1 This specification covers requirements for water suitable for use in methods of chemical analysis and physical testing. Four grades are specified: Type I Type II Type III Type IV Electrical...
Standard Specification For Reagent Water
A description is not available for this item.
Standard Specification for Reagent Water
A description is not available for this item.
Standard Specification for Reagent Water
A description is not available for this item.
Standard Specification for Reagent Water
A description is not available for this item.
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