Summary
A carcinogen, 4,4′-methylenedianiline (MDA, p,p′-diaminodiphenylmethane), was determined in gammaray- and in autoclave-sterilized thermoplastic polyurethane (PU). The determination of MDA in aqueous extracts of PU has been reported, however recovery of MDA and its determination using a complete dissolution of PU by organic solvents have not. In addition, we report the MDA determination in methanol extract of PU. No MDA was detected in gamma-ray sterilized thermoplastic PU, but in autoclavesterilized thermoplastic PU, MDA was detected (possibly formed by hydrolysis). The amount of MDA formed was inversely related to the molecular weight of PU by a second order equation. No change in the weight average molecular weight was observed as a result of autoclave sterilization. Essentially the same amounts of MDA were extracted from PU with serum as with methanol.
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References
Mazzu AL, Smith CP (1984) J Biomed Mater Res 18:961–968
O'Mara MM, Ernes DA, Hanshumaker DT (1984) Prog Biomed Eng 1:83–92
Ernes DA, Hanshumaker DT (1983) Anal Chem 55:408–409
Trippel-Schulte P, Zeiske J, Kettrup A (1986) Chromatographia 22:138–146
Darby TD, Johnson HJ, Northrup SJ (1978) Toxicol Appl Pharmacol 46:449–453
Okamura S (1964) Radiation chemistry of polymeric systems. In: High polymer engineering, vol XV. Chijinnshokann, Tokyo
Dyer E, Hammond RJ (1964) J Polym Sci 2:1–14
Furukawa M, Yokoyama TJ (1980) Chromatographia 198:212–216
Ing TS, Daugirdas JT (1986) Trans ASAIO 32:108–110
Golberg L, PhilHazard D (1986) Assessment of ethylene oxide. CRC Press, Boca Raton
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Shintani, H., Nakamura, A. Analysis of the carcinogen 4,4′-methylenedianiline (MDA) in gamma-ray and in autoclave-sterilized polyurethane. Z. Anal. Chem. 333, 637–640 (1989). https://doi.org/10.1007/BF00496937
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DOI: https://doi.org/10.1007/BF00496937