ASTM D2942 Total Acid Acceptance of Halogenated Organic Solvents (Nonreflux Methods)

During storage and use halogenated solvents may oxidize and produce acids which may corrode storage containers and processing equipment. To lessen acidification, stabilizers – typically epoxides or amines – are added to the solvents to neutralize these acids as they are created. Over time the stabilizers may become depleted. This method determines the amount of acid a stabilized halogenated solvent can absorb before becoming acidic. It may be used as a quality control tool, to determine specification adherence, or to monitor stabilizer levels over the life of the solvent.

In an Erlenmeyer flask, the sample, isopropanol and titration solvent containing excess acid are combined and given ten minutes to react. A color-changing indicator is added and the mixture is back-titrated with sodium hydroxide. The blank is corrected for and the total acid acceptance as equivalent sodium hydroxide is reported as a weight percent.

Price: $82.00

Sample size: 50 g

Related tests:

• ASTM D664 – Acid Number, Potentiometric – most current version used unless older version is requested or required
• ASTM D974 – Acid or Base Number by Color-Indicator Titration; Neutralization Number
• ASTM D2109 – Non-Volatile Residue
• ASTM D2110 – pH of Water Extracted from Halogenated Organic Solvents
• ASTM D2989 – Acidity-Alkalinity of Halogenated Solvents/Mixtures