16th February 2021
PEth post sampling formation from ethanol
In their latest publication, Olof Beck, Maria Mellring, Christian Löwbeer, Sabina Seferaj & Anders Helander investigated the post-sampling formation of PEth in various devices for blood microsampling.
they found that:
“with three commercial devices for volumetric dried blood microsampling, which is considered important for use in test applications needing precise substance quantification [41, 42], post-sampling formation of PEth from ethanol was observed with all of them (Mitra, Capitainer, Hemaxis), albeit to varying degrees, upon drying and storage at room temperature.”
They investigated that pretreatment of the DBS sampling substrate with an inhibitor (NaVO3) can stop the formation of PEth
No PEth formation was observed when blood spiked with ethanol at a physiologically relevant concentration (2 g/L) was added to Protein Saver card filters.
The article is published in Analytical and Bioanalytical Chemistry and is freely available by following this link.
4th January 2021
Quantitation of phosphatidylethanol in dried blood after volumetric absorptive microsampling
In their latest publication, Katleen Van Uytfanghe, Maria Del Mar Ramirez Fernandez, Aurelie De Vos, Sarah MR. Wille and Christophe Stove present the application of PEth analysis in Belgium, at the Ghent University’s Laboratory of Toxicology and the National Institute of Criminalistics and Criminology .
Congratulations on the successful initiation of a Belgian network for quantifying phosphatidylethanol 16:0/18:1.
The article is published in Talanta and is freely available by following this link.
8th December 2020
Protocol for PEth DBS Analysis
A protocol for the analysis of PEth in DBS (manually or automated) has been published by Springer-Nature in the Journal “Nature Protocols”.
The article is freely available follwing this link:
Highlight, 6th November 2020
The Importance of Regioisomeric Purity in PEth Reference Material
In their publication, Marc Luginbühl, Reuben S E Young, Frederike Stöth, Wolfgang Weinmann, Stephen J Blanksby, and Stefan Gaugler show the importance of the right choice of reference material for reliable PEth research.
“The results suggest caution in ensuring the regioisomeric composition of reference materials are well-matched with the authentic blood samples.”
The article is published in the Journal of Analytical Toxicology and can be found following this link: https://pubmed.ncbi.nlm.nih.gov/32248226/
4th November 2020
Stability of Phosphatidylethanol 16:0/18:1 in Freshly Drawn, Authentic Samples from Healthy Volunteers
In their latest publication, Ragnhild Bergene Skråstad, Olav Spigset, Trond Oskar Aamo and Trine Andreassen challenge current knowledge about PEth storage and stability.
Within their novel publication they state “PEth 16:0/18:1 is stable for 28 days irrespective of storage temperature”
The article is published in the Journal of Analytical Toxicology and can be found following this link: https://pubmed.ncbi.nlm.nih.gov/32754728/
6th October 2020
Testing venous CDT or capillary PEth with concurrent EtG and EtPa hair tests to assess historical and recent alcohol use
In their latest publication, L. Tsanaclis, M. Davies, S. Bevan, J. Nutt, K. Bagley and J. Wicks compare direct (EtG, FAEE, PEth) and indirect (CDT) alcohol biomarkers either measured in hair or blood.
The results of the study “substantiate the case for using hair EtG in conjunction with a PEth test, rather than CDT test, for efficient monitoring of recent and historical alcohol consumption.”
The article is published in Drug Testing and Analysis and can be found following this link: https://doi.org/10.1002/dta.2939