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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NOTE 5—The choice of end point will have been made to provide optimum data for the intended use or disposition of the water. 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.
Color change and endpoint data d167 indicators listed herein are presented in Appendix X2 and Table X2. It is used to develop an electrometric titration curve sometimes referred to as aztm pH curvewhich defines the acidity or alkalinity of the sample and indicates inflection points and buffering capacity, if any. No other units of measurement are included asmt this standard. Interpretation of acidity and alkalinity data should be made cautiously.
Hold the tip of the pipette near the bottom of the container while discharging the sample.
ASTM D 水的酸性和碱性的测试方法_百度文库
It is used to develop an electrometric titration curve sometimes referred to as a pH curvewhich de? Standard acid is added as needed to lower the pH to 4. 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 containing hydrolyzable salts that contain cations in several oxidation states.
The other two methods are used to determine acidity or alkalinity relative to a predesignated end point based on the change in color of an internal indicator or the equivalent end point measured by a pH meter. When using an indicator, add 0. It is used for the development of a titration curve that will define inflection points and indicate buffering capacity, if any.
ASTM D1067 – 16
adtm Link to Active This link will always route to the current Active version of the standard. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. In addition, the acidity sstm alkalinity can be determined with respect to any pH of particular interest. The value obtained must fall within the control limits established by the laboratory.
After each addition, mix the solution thoroughly.
A procedure for the preparation of carbon dioxide-free water is given in Practice E To this solution add 0. As the end point is approached, a momentary change in color will be noted in that portion of the sample with d10667 the reagent?
ASTM D – 16 Standard Test Methods for Acidity or Alkalinity of Water
Hydrogen peroxide H2O2 is added, the solution boiled, and? Three test methods are given as follows: Active view current version of standard. Of the three procedures, Test Method A is the most precise and accurate. Refer to Appendix X4 for historical information. The LCS must be taken through all of the steps of the analytical method, including sample pretreatment.
Active view current version of standard Translated Standard: Of the three procedures, Test Method A is the most precise and accurate.
Last previous edition 1d067 — D — 068 and dissolve. If a concentration other than the recommended concentration is used, refer to Test Method D for information on applying the F test and t test in evaluating the acceptability of the mean and standard deviation.
When titrating to a selected end point dictated 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 d067.
In many instances, the concentration of ferrous iron is such that a 2-min boiling period is not sufficient to assure complete oxidation. The acidity or alkalinity of the water or that relative to a particular pH is determined from the curve.
From that point on, make dropwise additions.
If large numbers of samples are analyzed in the bath, analyze the LCS after every 10 samples. Mechanical stirring, preferably of the magnetic type, is required for this operation; mixing by means of a gas stream is not permitted.
In d107 instances the reaction time may be an interval of a few seconds while other slower, more complex reactions may require much longer intervals. Three test methods are given as follows: In this test method, hydrogen peroxide is added prior to boiling to accelerate the chemical reactions needed for equilibrium.
When titrating to a selected end point dictated by practical considerations, 1 only a part of the actual neutralizing capacity of aztm water may be measured, or 2 this capacity may actually be exceeded in arriving at optimum acidity or alkalinity conditions.
In water analysis, a pH of about 4. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
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