Workshop on Ultrafine Particles: Classification, Characterization, and Instrument Performance Requirements
(In-person only event)
Date: March 26, 2026
Event Location: Hyatt Regency Dallas, Dallas, Texas, United States
Organized by: ASTM Committee D22 on Air Quality
Registrants will be emailed the digital Program Booklet, which will include the Technical Program and the full abstracts, approximately one week before the event, and also the morning of the start of the event. For more information, contact symposia@astm.org.
About the Event
The Workshop on Ultrafine Particles: Classification, Characterization, and Instrument Performance Requirements will be held March 26, 2026. The workshop is organized by ASTM Committee D22 on Air Quality, and will be held at the Hyatt Regency Dallas, Dallas, Texas, United States in conjunction with the standards development meetings of the committee. The language of the workshop will be English.
Objective and Scope
While toxicological research has traditionally focused on PM2.5, growing evidence suggests that ultrafine particles (UFPs)—particles between 5 and 1000 nm—may have significant health implications due to their high surface area and ability to penetrate deep into the lungs and bloodstream. These particles, which are generally undetectable by traditional optical methods, require specialized technologies to characterize their number, size, surface area, and mass.
This workshop will explore:
- Defining UFPs by maximum particle size
- Classification of UFP types and sources
- Detection technologies, including Condensation Particle Counters (CPCs) and charged particle counters
- Instrument performance requirements and quality control
- Correlating UFP parameters with health outcomes
Despite extensive study, consensus on these key issues has not been achieved within the aerosol and particle science community. This workshop aims to serve as a collaborative forum for identifying paths forward toward standardized definitions and measurement approaches.
Target Audience
This workshop is intended for:
- Academics: toxicologists, epidemiologists, aerosol and healthcare scientists, and analytical chemists
- Regulators: those involved in environmental and public health policy
- Instrument Manufacturers: technical directors, CTOs, applications chemists, R&D engineers, and industrial scientists
Technical Program
Registrants will be emailed the digital Program Booklet, which will include the Technical Program and the full abstracts, approximately one week before the event, and also the morning of the start of the event. For more information, contact symposia@astm.org.
Registration
Registration is now open. The fees to attend this event are listed below.
|
Through February 15, 2026 |
After February 15, 2026 | |
|---|---|---|
| ASTM Member | Waived | Waived |
| Non-member | $115.00 | $165.00 |
| Presenter | Waived | Waived |
| Student* | Waived | Waived |
Not an ASTM Member? An Individual Membership costs only $115.00. If you would like to become a member of ASTM International and Committee D22 to begin taking advantage of all the ASTM membership benefits, including attending this event at a reduced rate, please use the link below to join ASTM before registering for the event. After you have become a member, please return to this webpage to register for the event as an ASTM Member.
All Attendees – All attendees are urged to register for this workshop before arriving onsite. All attendees must check in at the ASTM Registration Area to obtain their name badge before entering the event room.
Presenters– Workshop presenters do not need to register. All presenters will be automatically registered by ASTM.
*Students – Students may be eligible for a reduced registration fee provided they meet certain requirements. To qualify for the reduced fee, you must be an active ASTM Student Member, full-time student, not employed full-time, and be able to provide a current valid university email address for registration. To register as a student, please email ASTM Symposia Operations at symposia@astm.org with your current university email address and your ASTM Student Member membership number.
Cancellations – A refund of the workshop fee will be honored only if requested at least 10 business days prior to the start of the event. To cancel your registration, please click the "Modify My Registration" button found in your registration confirmation email and follow the prompts to cancel your registration. Please contact Symposia Operations at symposia@astm.org or 610-832-9522 if you need assistance.
If you have questions concerning online registration, please contact Symposia Operations at
symposia@astm.org Tel: 610-832-9522, or ASTM Technical Support at https://www.astm.org/contact.
Technical Chair Contact Information
John Saffell
NosmoTech
Email: john@nosmotech.com
Phone: +44 7802 827 828
Raul Dominguez
South Coast Air Quality Management
Email: RDominguez@aqmd.gov
Phone: +1 (909) 396-2225
Continuing Education Units
Workshop attendees interested in receiving 0.7 Continuing Education Units (CEUs) for 7 hours must complete the CEU application form in the back of the program booklet and email it to ASTM Symposia Operations at symposia@astm.org. You must be registered and have attended the entire event in order to receive the CEU’s. A certificate will be sent to you via email approximately 1 to 2 weeks after the workshop concludes.
Hotel Information
All meetings will be held at the Hyatt Regency Dallas, 300 Reunion Blvd, Dallas, TX 75207.
Hotel Reservations:
Please support ASTM International by reserving your sleeping room at our official April 2026 Committee Week Hotel and Meeting site.
The discounted rate will be honored until the ASTM block is full, but no later than Friday, February 27th, 2026. The ASTM rate is $215, plus tax and fees. You may be charged a higher rate if reservations are received after the cutoff date or when the block is full. The hotel requires a credit card to guarantee your reservation. once submitted, a confirmation number will be provided electronically.
To book accommodations using the ASTM rate, please click here: Hyatt Regency Dallas
To book accommodations using the government per diem rate, please click here: Government Room Rate
The Hyatt Regency Dallas has a limited number of rooms at the government per diem rate. The government per diem rates are set by fiscal year, effective October 1 each year; you will be charged the prevailing rate at the time of the meeting, not at the time of booking. To find current rates in the CONUS, visit GSA.GOV. The government per diem rate reservations may be made via our online reservation system, using the blue hyperlink above. You must present your ID at the front desk upon check-in.
CANCELLATION/CHANGE POLICY: All cancellations must be made at least 72 hours prior to arrival.
IMPORTANT! ASTM Rates are non-commissionable. If you book your reservation through a travel agent, they must ask for a non-commissioned ASTM Group Rate. ASTM cannot adjust your higher rate if commissions were paid to a travel agency.
The April Committee Week Hotel provides prime meeting space for your committee meetings, events, and activities. ASTM International is legally bound to fill the contracted guest room block, and an inability to fill the block will result in severe financial penalties, which could affect negotiations and increase costs for future meetings.
INTERNET: Hyatt Regency Dallas offers complimentary Wi-Fi.
Standards Development Meetings
Committee D22 invites you to attend their future standards development meetings. There is no fee to attend these meetings, and membership in ASTM International is not required to attend. For more information about the committee and their future meetings, please visit the Committee D22 Homepage.