This standard is issued under the fixed designation D ; the number 1 These test methods are under the jurisdiction of ASTM Committee D19 on. Buy ASTM D Standard Test Methods for Acidity or Alkalinity of Water from SAI Global. ASTM: D Acidity or Alkalinity of water by electrometric titration Annual Book of ASTM Standards, Section 11, Water and Environmental Technology.
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The acidity or alkalinity relative to a particular pH may be determined from the curve. In addition, reagent water for ashm test shall be free of carbon dioxide CO2 and shall have a pH between 6. Second, at a d10067 of 8. A number in parentheses indicates the year of last reapproval.
The concentration of the IRM should be in the concentration mid-range for the method chose. Standard acid is added as needed to lower the pH to 4. NOTE 1—Sulfuric acid of similar normality may be used instead of hydrochloric acid.
Hold the tip of the pipette near the bottom of the container while discharging the sample. For the convenience of the user, Committee D has highlighted those changes that may impact the use of these test methods. After each addition, mix the solution thoroughly. They are suitable for routine control purposes.
When using an indicator, add 0.
ASTM D1067 – 16
In addition, the acidity or alkalinity can be determined with respect to any pH of particular interest. Current edition approved Jan.
asrm It is the responsibility of the user of this standard to establish appropriate safety and health practices aastm determine the applicability of regulatory limitations prior to use. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Acidic materials encountered in water analysis include, in addition to free organic and mineral acids, uncombined dissolved gases, and acids formed on hydrolysis of salts of weak bases and strong acids.
NOTE 2—If the sample requires appreciably more than 25 mL of standard solution for its titration, use a 0. Type III water was speci? Ragged or irregular curves may indicate that equilibrium was not attained before adding succeeding increments.
They are suitable for asrm control purposes. Only the particular adaptation of the electrometric titration appearing as the Referee Method is believed to be largely the work of Committee D Then, the analyst may be able to develop an interpretation of his data better suited to his particular needs.
A discussion of terms is presented in Appendix X1. Mechanical stirring, preferably of the magnetic type, is required for this operation; mixing by means of a gas stream is not permitted. The value obtained must fall within the control limits established by the laboratory.
It is the responsibility astn the analyst to determine qstm acceptability of these test methods for each matrix. Continue the titration until the necessary data for the titration curve have been obtained.
Suspended solids may interfere in electrometric titrations by making the glass electrode sluggish.
Astj to Appendix X4 for historical information. Active view current version of standard Translated Standard: The cumulative volume of solution added is plotted against the observed pH values. In addition, the acidity or alkalinity can be determined with respect to any pH of particular interest.
The acidity or alkalinity of the water or that relative to a particular pH is determined from the curve. Summary of Test Method From that point on, make dropwise additions.
This study should be repeated until the asgm are within the limits given in 15,24, or The replicates may be interspersed with samples.
ASTM D 水的酸性和碱性的测试方法_百度文库
D — 06 X4. In water analysis, a pH of about 4. When titrating to a selected end point aatm by practical considerations, 1 only a part of the actual neutralizing capacity of the water may be measured, or 2 this capacity may actually be exceeded in arriving at optimum acidity or alkalinity conditions.
It is used to develop an electrometric titration curve sometimes f1067 to as a pH curvewhich defines the acidity or alkalinity of the sample and indicates inflection points and buffering capacity, if any. 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.
Originally published as D — atm Refer to Appendix X4 for historical information. NOTE 5—The choice of end point will have been made to provide optimum data for the intended use or disposition of the water.
ASTM D – 88 Standard Test Methods for Acidity or Alkalinity of Water
Three test methods are given as follows: Purity of Reagents 5. Three test methods are given as follows:. It is mandatory that analyses by Test Method A be carried out the same day the samples are taken; essentially immediate analysis is desirable for those waste waters axtm hydrolyzable salts that contain cations in several oxidation states.