News
münster analytical solutions gmbh
New Proposal for Toxicity Equivalent Factors
A Comparison
Some familiar names appear in the publication by Michael DeVito et al. (Regulatory Toxicology and Pharmacology 146 (2024)), which highlights the WHO's (2022) reassessment of TE factors for dioxins and PCBs.
These currently have no regulatory impact on the assessment of dioxin/PCB levels in different matrices. Nevertheless, we have conducted a test comparison of the levels of some matrix groups (expressed in toxicity equivalents [TEQ]) according to the currently valid calculation method according to WHO 2005 compared to the proposed WHO 2022.
Even though the data set used for this purpose was small, some trends are emerging, with careful interpretation:
1) Exhaust gases. Since the combustion profiles of dioxins and PCBs generally follow a similar pattern, the calculations also show a comparatively low range of variation, which leads to lower TEQs for dioxins in the WHO 2022 assessment than in the WHO 2005 assessment (approx. 20% lower). For PCBs, the WHO (2022) TEQ is on average 50% below the WHO (2005) TEQ.
2) Residues. Here, the range of variation is much greater and, of course, strongly dependent on the origin of the samples. However, we would tend to assume that the assessment according to the 2022 TEFs will be higher on average than that of the current TEFs.
3) Food/feed. Here, too, we are of course considering a large number of sample types from different sources. Accordingly, the range of variation is also enormous. Nevertheless, based on our research, we would expect a lower assessment by the WHO in 2022.
The future will tell whether these assessments are accurate. The attached file shows a comparison of the two TEF models.
New Head of Emission and Ambient Air Department
Stefanie Görkes is the woman in charge
It may appear a bit like a three-way-swap, but it's not less than a change to generation Y
Mrs. Stefanie Görkes is our new functional woman in charge for Emissions and Ambient Air according to the German Environmental Control Act.
Her predecessor, Dr. Peter Luthardt, will now be her deputy in this function, along with his management colleague Franz Jöne.
We are looking forward !
Congratulations, Steffi
Home-made
10.4.25 mas in business for 20 years
Our 20th anniversary obviously entails creativity all over. Sandra has put our jubilee year logo on the front door.
Looks well
PAH-like Components
25.3.25 Expanded PAH Portfolio. Oxy-PAHs, NSO-PAHs and alkylated PAHs
Quinoline
In the literature they are cited as Oxy, NSO- and alkylated PAHs. We prefer to name it -short and simple- PAH-like components to rarely tie the circle to the well-known dioxin-like substances.
QS Laboratory Performance Assessment on PAHs in Soy Oil and Apple Pulp
Successful participation
The German QS (Qualität und Sicherheit GmbH) operated a laboratory performance assessment (feed monitoring 2024) on Polycyclic Aromatic Hydrocarbons (PAHs) in soy oil and apple pulp.
The mas participated successfully.
Brominated Dioxins
Now part of the new TA Luft (Technical Instruction for Air Pollution Abatement) and 17th BImSchV
At our facility, the methodology for determining brominated dioxins and furans has been established, validated, and accredited since 2006.
We cover the entire spectrum of brominated analysis with our usual quality:
- Homologue totals from Tetra- to HeptaBDD/F
- 17 congeners with 2378-bromine substitution pattern
- 8 PBDD/F congeners according to the Chemical Prohibition Ordinance
Study on extraction efficiency
Current since the presentation at the DIOXIN Conference 2007
Is it certain that the usual extractions in the analysis process can really capture all organic trace components? Evidence for this was still pending.
mas published results of its own studies as early as the 2007 Dioxin Conference.
This yielded the still current answer to the question: How good is the extraction efficiency really? But read for yourself...
