Abstract
In respect of complete digestion of organic waste materials, a relevant potent digestion technique was developed, and a prototype of a high pressure ashing device with infrared heating (IR-HP-asher) was built. The apparatus consists of six quartz digestion vessels inside a steel autoclave. The performance of the IR-HP-asher was tested for pure organic substances, for representative wastes from the recycling industry, and for several biological samples. In all cases, complete digestion could be attained within 90 min as well as complete recovery of metal(loid)s present in the sample. Concerning the completeness of digestion and absence of analyte loss, the IR-HP-asher was found to be superior to two conventional microwave digesters also tested.
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Strenger, S., Hirner, A. Digestion of organic components in waste materials by high pressure ashing with infrared heating. Fresenius J Anal Chem 371, 831–837 (2001). https://doi.org/10.1007/s002160101076
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DOI: https://doi.org/10.1007/s002160101076