ASTM D1193-91 PDF

ASTM D Standard Specification for Reagent Water. Be notified when this Standard is updated or amended – Add to StandardsWatch. General Product . Designation: D – 99 e1 . 1 This specification is under the jurisdiction of ASTM Committee D on as D – 51 T. Last previous edition D – 91 . ASTM D – 99e1 Standard Specification for Reagent Water. View on Information Provider website {{ linkText }}. Abbreviation. ASTM D Amendment.

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Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Results of in vivo and in vitro experiments are negatively impacted when astn are present, and labware is easily contaminated.

The resistance of water can be easily and inexpensively monitored in a laboratory.

Tests should be conducted to verify that the hydraulic, monitoring and electronic functions including system alerts of the systems are working according to the speci? Register for a trial account. The amount of organic components released differs depending on the type and brand of the membrane?

ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.

Water quality syandards| Pure water| Wasserlab

Gravity feed is the preferred method if possiblesince pumps are a potential source of contamination. TOC is typically measured in parts per billion ppbwith Type 1 water systems having less than 10 ppb.

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Use and Application 5. Ion exchange, distillation, or reverse osmosis and organic adsorption may be required prior to distillation if the purity cannot be attained by single distillation.

After each sanitization, veri?

ASTM D 修改版 Standard Specification for Reagent Water_百度文库

Published in the U. The periodicity of such draw-offs and sanitization should be de? These have been assigned in order of historical precedence and should not be taken as an indication of a progression in water purity.

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. D Standard Specification for Reagent Water 1. The measurement is calculated from the total carbon d11193-91 a water sample, subtracting out inorganic carbon from dissolved carbon dioxide and carbonic acid salts to arrive at the TOC Count.

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. Refer to the supplier speci?

What Type of Laboratory Water Do I Need?

These ratings were established by the international rating organization ASTM and ranked from Type 1 the most pure to Type 4 the least pure. Water is the most common reagent used in the laboratory, and while water quality can often be overlooked, the grade of water being used in an d11193-91 is critical.

De1 Standard Specification for Reagent Water.

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No further reproductions authorized. Type 2 reagent grade water is defined by ASTM as water that has greater than 1 megohm-cm resistivity. Such contaminants were not necessarily considered by the performance characteristics of the technology previously speci? Different grades of water may be covered by other ASTM speci? Practices may be put in place to decrease the risk or organic contamination: Remember me for one month.

A superscript epsilon e indicates an editorial change sinc. The number of bacterial cells with the potential to multiple and grow in the water is counted and reported as colony forming units CFUs per unit volume ml. This procedure is most easily carried out by autoclaving at kPa 15 psi for 20 min.

The handling of blanks associated with the analysis of ultra-pure water samples is also covered by this practice.

Definition of ASTM D1193-91

Water types, other than Type I, can be stored if particular attention is taken regarding the materials, design of the storage system and time of storage. The actual installation should be compared with an installation drawing to ensure that no future installation modi? The inch-pound units given in parentheses are for information only.

It should be recognized that the mere fact that the water is stored will likely reduce its purity despite attempts to prevent contamination.