Draft Practice for Estimating pH to Verify Preservation of Laboratory Samples

ASTM Committee D-19s Effort to Provide Useful Test Methods to the Environmental Laboratory Community
Oral Presentation

Prepared by W. Lipps
Eurofins Eaton Analytical (EEA), 750 Royal Oaks Drive, Monrovia, CA, 91016, United States

Contact Information: williamlipps@eurofinsus.com; 626-386-1125


ASTM D19, EPA, and standard methods often require a verification of pH before analysis, during an analytical step, or as a preservative. The methods do not usually specify or provide instruction on how an analyst should verify pH. This guide could be referenced in existing and future ASTM methods or referenced by laboratories. The intent is that all laboratories use consistent procedures per method.