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Analytical and Characterisation Excellence in nanomaterial risk assessment: A tiered approach


Output guidelines related to key descriptors and risk assessment

This task has been built to guarantee that SOPs associated with the ACEnano toolbox of methods deliver outputs tailored to the needs of key descriptors for hazard and risk assessment (e.g. describe surface coating and coating degradation under realistic exposure scenarios; describe particle size distribution in polydisperse samples on a particle per particle basis suitable for regulation). Therefore, output guidelines related to key descriptors for hazard and risk assessment will be developed, along with guidance on the domains of applicability of the methods, to be applied within the respective WP and utilised in WP3 in the training activities. This task will deliver D5.3.

Guideline for Method and Protocol Standardization

Developing and even established nanometrology techniques require data treatment that can often be quite involved, and requiring user-intervention. Choosing a dissolved/NM cut-off value during spICP-MS data treatment is an example. This kind of expert involvement is best minimized to arrive at consistent, verifiable measurands that are intercomparable with each other and with similar measurands to be used in modelling and for longer term integration goals, such as standardization of particular techniques into an integrated testing strategy. Such activities require development of optimal, objective data treatment techniques for several nanometrology techniques, used within ACENano and other NSC projects, which will also form an important part of the standardization efforts and user guidance.

Refined strategy for benchmarking, training, decision tree development

Benchmarking will feed directly into the development of the decision tree approach, which will guide end users through the sequence of methods to be used to obtain the required key descriptors for a given purpose. Development of the decision tree will be done as follows: i. Initial consultation with industry and regulatory stakeholders on required uses of the decision tree/characterisation suite in relation to regulatory hazard and risk assessment needs. ii. Following each round of method benchmarking, derived applicability domains will be used to re–assess and refine the first round decision tree workflows for each desired use. iii. The process of ii. will be repeated through the project lifetime in order to progressively refine the characterisation suite and decision tree workflows in line with stakeholder use requirements.

Report on outcomes of kickoff stakeholder workshop: initial strategy for benchmarking, training, decision tree development

The developing “virtual toolbox” platform in ACEnano will need to be aligned with the needs and views of regulators and industry, to facilitate incorporation of the ACEnano virtual toolbox and approaches into regulatory processes. A regulatory workshop and teleconferences with regulators and industry will therefore be facilitated, to (i) assess their future needs and map these to the ACEnano workflows; (ii) present the proposed workflow of the ACEnano tiered approach with regulators, and to discuss how the decision trees regarding method selection can be aligned with regulatory needs and be incorporated into existing and evolving regulatory frameworks and technical guidance documents.

Proficiency testing scheme

In order to ensure a comparable performance of labs and to guarantee reliable method output data obtained from WP1-4 will be utilized and critically evaluated. Therefore, output guidelines related to key descriptors and risk assessment will be developed by WP5 and applied within the respective WPs. Based on the knowledge developed within the project, ACEnano will establish a proficiency testing scheme providing guidelines on parameters for comparable testing and data acquisition for risk assessment in Europe. Guidance for the appropriate and efficient use of ACENano’s toolbox of methods for development of the materials characterisation section of regulatory dossiers for risk assessment will be developed.

Guidelines for inter laboratory comparisons (ILC) for validation of harmonized SOPs

The aim of this deliverable is to describe activities to ensure harmonisation of key in-house SOPs in WP1-4 via conducting and evaluating inter-laboratory comparisons according to international evaluation standards. Therefore, specific support during the design (definition of measurands, calibrations and traceability of measurements) and data evaluation of the inter laboratory comparisons will be provided. A default approach for ILCs will be developed and the application throughout the project wherever feasible will be ensured. This common approach will harmonise the validation of the various methods in work packages 1-4. Potential method candidates for inter laboratory validation will be determined at Month 12 based on Go/NoGo decisions made in WPs 1-3.

Interim report on method benchmarking

Benchmarking of the ACEnano approved techniques/methods (Tier 1 and those coming from WPs 1 and 2) will be an essential step to developing the analytical toolbox, building regulatory acceptance of the methods and their resulting outputs (Task 3.2. In the context of methodology and toolbox development in ACEnano, the goal of benchmarking is to establish ‘best practice’ for as many of the studied techniques/methodologies as possible, to maximise uptake of the toolbox as ‘best practice’ for NM analysis for fate and risk assessment by both regulators and industry.

Project Website

The project’s website (tentative: will be the backbone of the communication efforts of ACEnano, and will be set up as early in the life of the project as practical, in a basic form, and will be expanded as appropriate. This deliverable will confirm its launch and features.

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Determining the Catalytic Activity of Transition Metal-Doped TiO2 Nanoparticles Using Surface Spectroscopic Analysis

Author(s): Sena Yang, Hangil Lee
Published in: Nanoscale Research Letters, Issue 12/1, 2017, Page(s) 582, ISSN 1931-7573
DOI: 10.1186/s11671-017-2355-7

Enhancement of Catalytic Activity of Reduced Graphene Oxide Via Transition Metal Doping Strategy

Author(s): Hangil Lee, Jung A Hong
Published in: Nanoscale Research Letters, Issue 12/1, 2017, Page(s) 426, ISSN 1931-7573
DOI: 10.1186/s11671-017-2196-4

Structural colour of unary and binary colloidal crystals probed by scanning transmission X-ray microscopy and optical microscopy

Author(s): Hyun Woo Nho, Tae Hyun Yoon
Published in: Scientific Reports, Issue 7/1, 2017, Page(s) 12424, ISSN 2045-2322
DOI: 10.1038/s41598-017-12831-4

Current Application of Capillary Electrophoresis in Nanomaterial Characterisation and Its Potential to Characterise the Protein and Small Molecule Corona

Author(s): Andrew Chetwynd, Emily Guggenheim, Sophie Briffa, James Thorn, Iseult Lynch, Eugenia Valsami-Jones
Published in: Nanomaterials, Issue 8/2, 2018, Page(s) 99, ISSN 2079-4991
DOI: 10.3390/nano8020099

Fast and non-destructive Raman spectroscopic determination of multi-walled carbon nanotube (MWCNT) contents in MWCNT/polydimethylsiloxane composites

Author(s): Donghyun Ryoo, Jong Yun Kim, Pham Khac Duy, Sang Hoon Cho, Hoeil Chung, Tae Hyun Yoon
Published in: The Analyst, Issue 143/18, 2018, Page(s) 4347-4353, ISSN 0003-2654
DOI: 10.1039/C8AN00351C

LA-ICP-TOF-MS for rapid, all-elemental and quantitative bioimaging, isotopic analysis and the investigation of plasma processes

Author(s): Oliver Bolle Bauer, Oliver Hachmöller, Olga Borovinskaya, Michael Sperling, Hans-Joachim Schurek, Giuliano Ciarimboli, Uwe Karst
Published in: Journal of Analytical Atomic Spectrometry, Issue 34/4, 2019, Page(s) 694-701, ISSN 0267-9477
DOI: 10.1039/c8ja00288f

Sewage spills are a major source of titanium dioxide engineered (nano)-particle release into the environment

Author(s): Frédéric Loosli, Jingjing Wang, Sarah Rothenberg, Michael Bizimis, Christopher Winkler, Olga Borovinskaya, Luca Flamigni, Mohammed Baalousha
Published in: Environmental Science: Nano, Issue 6/3, 2019, Page(s) 763-777, ISSN 2051-8153
DOI: 10.1039/c8en01376d

Identification of nanoparticles and their localization in algal biofilm by 3D-imaging secondary ion mass spectrometry

Author(s): Pietro Benettoni, Hryhoriy Stryhanyuk, Stephan Wagner, Felix Kollmer, Jairo H. Moreno Osorio, Matthias Schmidt, Thorsten Reemtsma, Hans-Hermann Richnow
Published in: Journal of Analytical Atomic Spectrometry, Issue 34/6, 2019, Page(s) 1098-1108, ISSN 0267-9477
DOI: 10.1039/c8ja00439k

Exploring the potential of laser desorption ionisation time-of-flight mass spectrometry to analyse organic capping agents on inorganic nanoparticle surfaces

Author(s): Konstantinos Giannopoulos, Oliver J. Lechtenfeld, Timothy R. Holbrook, Thorsten Reemtsma, Stephan Wagner
Published in: Analytical and Bioanalytical Chemistry, 2020, ISSN 1618-2642
DOI: 10.1007/s00216-020-02740-3