Analytical Pyrolysis Letters

This area presents applications in the field of analytical pyrolysis. It includes new research, comments on published material and other types of entries. Analytical Pyrolysis Letters (APL) facilitates information and knowledge exchange among pyrolysis researchers but also outreach to other science disciplines and to the general public: the APL typically have a hybrid composition with technical and non-technical content. The APL and associated attachments have stable URL. As such, APL can be used as a rapid and innovative way of “publishing” material that may not be suitable for peer-review. Its ISSN is 2659-5605.

Analytical Pyrolysis Letters is an initiative of Pyrolyscience S.L.U. and edited by Joeri Kaal:

If you are interested in contributing to APL:

Recent entries


Streams and reservoirs in the Harz National Park experience high dissolved organic matter (DOM) concentrations, the cause of which is unknown. We studied potential sources of DOM by means of pyrolysis-GC-MS (Py-GC-MS). The biological materials include vegetation samples (spruce, birch, blueberry, heather, sedge, grass, peat moss, epiphytic moss), microbial sources (epilithic biofilm, lichen, fungi) and excremental fabric. In addition to ground biological samples (bulk organic matter; BOM), their leachates (water extraction of BOM samples followed by filtration; WEOM) were analyzed, to obtain knowledge on solid-liquid transfer effects.

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At the Neolithic site Bastuloken, several subterranean embankments have been identified. The corresponding sediments contain large amounts of bones and lithic elements, indicative of not only massive hunting but possibly also a large (elk) skin processing plant. The present study uses analytical pyrolysis and infrared spectroscopy to track changes in organic matter (OM) composition and relate them to past human activities. It appeared that the sediments contained two layers with a very strong and typical collagen fingerprint (dominated by pyrrole and diketodipyrrole), confirming ubiquitous presence of bone and/or meat (the soils are acidic and most bone materials have dissolved). Also, black carbon was abundant in several layers, which is probably an indication of fireplaces. Thus far, the results fit with the hypothesis of major inputs of animal tissue especially during two phases recorded between 30-45 cm and 60-65 cm depth, the first of which also contains higher inputs of totarol, indicative of the use of resin from Cupressaceae (gymnosperm tree). The level of OM preservation in these Neolithic structures is extraordinarily good and shows huge potential for molecular fingerprinting and deepen our understanding of the activities at this important site and the temporary and spatial variability therein.

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download   Analytical pyrolysis in marine environments revisited By Joeri Kaal   Abstract  This contribution outlines applications of analytical pyrolysis techniques (APTs) –in particular pyrolysis-gas chromatography-mass spectroscopy (Py-GC-MS) and thermally assisted hydrolysis and methylation (THM-GC-MS)– to marine geochemical research. It is subdivided into two main lines, i.e. the results obtained from (1) sedimentary, particulate and dissolved OM from open water environments (estuaries,

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download     Naturally halogenated organic matter in Atlantic rankers is concentrated in microbial rather than pyrogenic moieties By Joeri Kaal and Antonio Martínez Cortizas (Earth System Science, GI-1553, Universidade de Santiago de Compostela, Santiago de Compostela, Spain)   Abstract  Organohalogens in the environment are a booming research subject, due to their role in many ecosystem functions and ecotoxicology. A

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Molecular properties of soil organic matter in dark buried colluvium from South Germany show abundance of fire residues from Early Neolithic vegetation clearance and slash and burn agriculture. By Joeri Kaal and Sonja Mail:ander. Geoarchaeological surveys in South Germany (Ipf area) showed continuous presence of human occupations since the Palaeolithic and remarkable colluvial soils containing dark buried layers dated to the Neolithic. Here we discuss molecular properties of soil organic matter (SOM) from three of these colluvia by Py-GC-MS.

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Sources of organic detritus under mussel farms in the Ría de Betanzos (NW Spain).
By Joeri Kaal and Uxío Labarta

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Itla-okla (Tillandsia usneoides) fibre temper in Pre-Columbian ceramics.
By Joeri Kaal and Zack Gilmore

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Chemotyping the lignin of Posidonia seagrasses.
By Joeri Kaal, Oscar Serrano, José-Carlos Del Río and Jorge Rencoret.

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Editorial information

Analytical Pyrolysis Letters is an online journal that is edited by Joeri Kaal, from Calle Vallehermoso 15/5-2, 28015 Madrid (Madrid), Spain.

ISSN 2659-5605