Evaluation of nitric-induced teflon degradation by spectrochemical fluoride analysis and scanning microscopy |
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| Authors: | A Muñoz M Gómez M A Palacios and C Camara |
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| Institution: | (1) Departamento de Quimica Analitica, Facultad de Ciencias, Ciudad Universitaria, Universidad Complutense, E-28040 Madrid, Spain |
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| Abstract: | Summary The degradation of the teflon used to hold biological samples for nitric acid mineralization in a microwave oven or in a steel-jacketed bomb in a conventional oven was studied by:a) scanning electron microscopy to observe teflon degradation after mineralization and b) molecular absorption spectrometry to determine the fluoride released from the teflon in the HNO3 solution. All types of teflon tested were increasingly degraded with increassing exposure to nitric acid. |
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