"NSO"-Heterocycles

The group of Polycyclic Aromatic Hydrocarbons is drifting to become more widespread, talking about Polycyclic Aromatic Compounds (PAC).

One of these PAC groups are the so-called NSO Heterocycles, characterised by ring systems containing oxygen, nitrogen or sulphur. These are shortly named PAOHs, PANHs and PASHs respectively, and not to mix up with Oxy-PAHs or Nitro-PAHs for example. NSO Heterocycles are suspected to partly show higher toxicity levels than their "parent components" (PAHs). 

Actually the mas' analytical portfolio contains (some) of these components, e.g. Dibenzofurane and Dibenzo(p)dioxine (the skeletal structures of the halogenated PCDD/Fs and PBDD/Fs species) as well as Biphenyle, which we would rather name the PAH like components.

Moreover, Dibenzocarbazole and Dibenzacridines already belong to the DHHS-list of our PAH spectrum, added by the sulphur component Benzonaphthothiophene and soon by the Nitrogen component Quinoline.