ASTM D2110-96

NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn. Contact ASTM International (www.astm.org) for the latest information.
Designation: D 2110 – 96
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
pH of Water Extractions of Halogenated Organic Solvents
1
and Their Admixtures
This standard is issued under the fixed designation D 2110; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 4.2 Glass Electrode pH Meter (Procedure B).
1.1 This test method covers the measurement of the pH of
5. Water
water extractions of halogenated organic solvents and admix-
5.1 Neutral Distilled Water shall be prepared as follows:
tures thereof. This test method is applicable for the determina-
Boil 1 L of distilled or deionized water for 5 min in a
tion of the pH of water extractions of virgin, reclaimed, or used
borosilicate glass or stainless steel container, then cover and
solvents.
cool to room temperature. Titrate a 50-mL aliquot to a pH of
1.2 This standard does not purport to address all of the
7.0 to 7.3 with either 0.01 N sodium hydroxide (NaOH)
safety concerns, if any, associated with its use. It is the
solution or 0.01 N hydrochloric acid (HCl), depending upon
responsibility of the user of this standard to establish appro-
whether the initial pH is above or below 7. From this titer,
priate safety and health practices and determine the applica-
calculate the volume of 0.01 N NaOH solution or 0.01 N HCl
bility of regulatory limitations prior to use.
required to adjust the pH of the remaining 950 mL of boiled
2. Summary of Test Method
distilled or deionized water to a pH of 7.0 to 7.3. Add the
calculated volume of 0.01 N NaOH solution or 0.01 N HCl
2.1 The solvent sample is shaken with freshly boiled neutral
together with the titrated 50-mL aliquot of neutralized water to
distilled or deionized water and the pH of the water extract
the 950-mL stock and mix thoroughly. Determine the pH of a
determined by one of two procedures:
second aliquot. If further adjustment is necessary to obtain a
2.1.1 Procedure A, by comparing the color formed upon the
pH of 7.0 to 7.3, repeat the above procedure.
addition of Gramercy Universal Indicator with that of a
calibrated Gramercy pH Indicator Color Chart, or
6. Procedure
2.1.2 Procedure B, using a glass electrode pH meter.
6.1 Transfer 50 mL of the halogenated organic solvent to a
3. Significance and Use
250-mL separatory funnel containing 50 mL of freshly boiled
neutral distilled or deionized water. Shake the mixture for 2
3.1 The pH of halogenated solvents varies according to the
min; then let stand and allow the layers to separate. Drain and
nature of stabilizers in the particular solvent. Solvents with
discard the halogenated solvent layer and transfer the water
alkali
...