Pyrogenic material

Analysis of select PNA to verify petroleum origin showed that all sediment contained mixed petrogenic and pyrogenic material. The relative abundance of PNA in marina sediment, however, was much greater (180 ng/g benzanthracenes) than that found in sediment from non-marina areas (<0.1 ng/g benzanthracenes). 

Kuratsune, M. Benzo[a]pyrene content of certain pyrogenic materials J. Natl. Cancer Inst. 16 (1956) 1485-1496. 

Chemical starting materials should harbour only minimal quantities of micro-organisms or pyrogenic material. The material specifications should, where appropriate, include limits for these contaminants. 

Starting materials especially for large volume parenterals should not contain significant levels of microorganisms or pyrogenic material. The material... 

The simation that the principal morphology of particles is completely unknown before characterisation may occur during the development of new routes for particle synthesis or when taking samples from the environment. However, when particle characterisation is part of quality assurance and process monitoring in industrial practice or for research applications, there is always prior knowledge on the particle shape or the state of aggregation. This also applies to pyrogenic materials, which... 

Since the presence of nanoparticles, e.g., in food or pharmaceutical products, is considered as a potential risk by legal authorities, this aspect needs to be carefully studied for pyrogenic materials. 

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