Publications

Hvordan har luftkvalitet i Europa endret seg under lockdown og hvorfor?

Guerreiro, Cristina; Solberg, Sverre; Walker, Sam-Erik; Schneider, Philipp

Hvordan kan forenklede beregninger av luftkvalitet gjennomføres? Powerpoint presentasjon. NILU F

Tønnesen, D.A.

Hvordan påvirker luftforurensning helsa vår?

Rundén-Pran, E.

Hvordan transporteres luftforurensninger inn i Arktis? (POLAR-CAT).

Stohl, A.

Hvorfor endre struktur, menyer og layout på nettstedet til Nettverk for Miljølære? NILU F

Endregard, G.

Hvorfor er forskning viktig og Disse er de viktigste endringene for at våre institutter skal gi økt samfunnseffekt.

Nygaard, K.

Hvorfor er luftforskere bekymret? Vedfyring og folkehelse.

Guerreiro, C.B.

Hybelkaniner kan være giftige: – Støvsug ofte, sier forsker

Solbakken, Christine Forsetlund

Norges forskningsråd

Hydration state of the moss Hylocomium splendens and the lichen Cladina stellaris governs uptake and revolatilization of airborne α- and γ-hexachlorocyclohexane.

Kylin, H.; Bouwman, H.

Hydrochlorofluorocarbon and hydrofluorocarbon emissions in East Asia determined by inverse modeling.

Stohl, A.; Kim, J.; Li, S.; O'Doherty, S.; Zhou, L.X.; Saito, T.; Vollmer, M.K.; Wan, D.; Yao, B.; Yokouchi, Y.

Hydrochlorofluorocarbon and hydrofluorocarbon emissions in East Asia determined by inverse modeling.

Stohl, A.; Kim, J.; Li, S.; O'Doherty, S.; Mühle, J.; Salameh, P.K.; Saito, T.; Vollmer, M.K.; Wan, D.; Weiss, R.F.; Yao, B.; Yokouchi, Y.; Zhou, L.X.

Hydrolysis of FTOH precursors, a simple method to account for some of the unknown PFAS

Nikiforov, Vladimir

There is a growing concern over a suspected presense of unknown perfluoroaliphatic substances (PFAS) in consumer goods and in the environment. Such unknown substances, possibly with high molecular weight, might be precursors of hazardous or controlled known PFAS. Recent studies confirmed that total organic fluorine (TOF) content often can not be explained by the measured target PFAS. One of the suspected classes of such unknowns are polymers with fluorotelomer alcohol (FTOH) residues in a side chain. In this report we suggest hydrolysis of precursors, as a complementary method to account for the unknown PFAS. It was shown here that hydrolysis allows to preserve structural information on the perlfuorinated parts of the precursors, which can be an advantage for the purpose of accurate risk assessment or source identification. A convenient procedure for hydrolysis with 4% sodium hydroxide inwater-methanol mixture (1:9) at 60 C for 16 h was shown to convert model substances - FTOH acrylate, methacrylate and isobutyrate esters as well as FTOH phenylcarbamate to free FTOHs. Analysis of extracts of textile samples with preliminary hydrolysis and without it showed up to 1300-fold higher level of “hidden” FTOHs.

Pergamon Press