Organic and Organotin Compounds Leached from PVC and CPVC Pipe.
Abstract
The primary objective of this research program was to determine whether or not organic forms of tin existed in potable water samples after contact with either polyvinyl chloride (PVC) or chlorinated polyvinyl chloride (CPVC) pipe containing organotin heat stabilizers. Analytical techniques to identify and quantitate organotin compounds at concentrations below one part per billion (ppb) were explored and refined. Four test protocols were used to simulate the extraction process. First, during method development, fragmented pipe samples were digested with extract ant water in order to obtain high surface-to-volume ratios, resulting in higher organotin concentrations than would be encountered in the field. Second, extractant water was continuously pumped through an 8.9-meter rectangular closed loop of one-inch internal diameter pipe having an inner surface area of 0.71 sq m (1100 sq in ), maintained at constant temperature. This system was used to provide sequential samples over a 22-day period, during which time the extractant water was completely removed for analysis and replaced at two- to four-day intervals. Third, a miniature pipe system attached to a laboratory faucet was used primarily to study the fate of the solvents incorporated in cements used to join segments of pipe. Fourth, incubation of short lengths of pipe with extractant water served as a convenient method to study changes in leach rates as experimental parameters such as pH were varied. jg p7
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1981
- Accession Number
- ADA303717
Entities
People
- Edward A. Boettner
- Gwendolyn L. Bell
- Romulo Aquino
- Zane Hollingsworth
Organizations
- University of Michigan