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ASTM D1067 PDF

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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In addition, the acidity or alkalinity can be determined with respect to any pH of particular interest. Subsequent hydrolysis of the resultant ferric ion immediately During the subsequent titration, the ferric ion is precipitated as ferric hydroxide: Hydrolyzable salts of aluminum and ferric and ferrous iron in mine drainage and certain industrial waste waters, are common causes of acidity.

Under such conditions, all ferrous iron is rapidly oxidized to the ferric state, resulting in the precipitation of Fe OH 3: Standard acid is added as needed to lower the pH to 4.

Interpretation of r1067 and alkalinity data should be made cautiously. Three test methods are given as follows:. The acidity or alkalinity of the water or that relative to a particular pH is determined from the curve.

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.

From that point on, make dropwise d10067. Of the three procedures, Test Method A is the most precise and accurate. Purity of Reagents 5. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.

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ASTM D1067 – 16

A discussion of terms is presented in Appendix X1. Add the standard solution in small increments, swirling the? They are suitable for routine control purposes. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM qstm the above address or at phonefaxor service astm.

ASTM D 水的酸性和碱性的测试方法_百度文库

They are suitable for routine control purposes. D — 068 and dissolve.

Link to Active This link will always route to the current Active version of the standard. Under the allowances made in 1. Of the three procedures, Test Method A is the asstm precise and accurate. Historical Version s – view previous versions of standard. While inflection points rapid changes in pH are usually preferred for accurate analysis of sample composition and obtaining the best precision, the use of an inflection point for process control may result in significant errors in chemical treatment or process control in some applications.

A number in parentheses indicates the year of last reapproval.

Waste materials present asym some waters may interfere chemically with color titrations by destroying the indicator. D — 06 The concentration of the IRM should be in asrm concentration mid-range for the method chose. NOTE 6—After some practice, slightly more or less indicator may be preferred. No other units of measurement are included in this standard. NOTE 8—Hydrochloric acid of similar normality may be used instead of sulfuric acid.

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Titration is carried out by means of an internal indicator using the color-change procedure described in Test Method B Electrometric or Color-Change Titration.

ASTM D – 16 – Standard Test Methods for Acidity or Alkalinity of Water

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.

NOTE 9—Minus acidity represents excess alkalinity contributed by constituents such as bicarbonates. It is particularly applicable to mine drainage, industrial waste waters carrying waste acids, and similar waters. Refer to Appendix X4 for historical information. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.

Last previous edition D — This section may also include descriptions of the changes or reasons for the changes, or both. Three test asttm are given as follows: It is the responsibility of the analyst to determine the acceptability of these test methods for each matrix. To this solution e1067 0. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.

Continue the titration until the necessary data for the titration curve have been obtained. Unless otherwise indicated, it is intended that all reagents shall conform to the speci?