Symposia / General Information

D37 Cannabis
Title: Workshop on Measurement of Elemental Contaminants in Cannabis/Hemp Consumer Products
Dates: Monday June 28 2021 - Wednesday June 30 2021
Location: Virtual; ,

Pre-registration requested to attend this meeting.


The Workshop on Measurement of Elemental Contaminants in Cannabis and Hemp Consumer Products will be held Monday-Wednesday, June 28-30, 2021. Sponsored by ASTM Committee D37 on Cannabis, the workshop will be held virtually.

Objective and Scope

Heavy metals are a known consumer safety hazard that are largely not being addressed by the cannabis/hemp industry. Currently four (4) heavy metals (Pb, Cd, As, Hg) are required by thirty-six (36) states in the United States and Canada where consumption of cannabis/hemp consumer products for various purposes is legal. However, there is compelling evidence in the public domain that at least another 10 elements could be of potential concern derived from the cultivation process and growing environment including soil, grow medium, fertilizers, nutrients, water, and growth enhancers etc.

In addition, the manufacturing of various cannabinoids can also lead to a further increase of these elemental contaminants through the processing, extraction, purification, packaging, dispensing systems, and device hardware, which can represent significant safety risks to consumers. Moreover, Maryland also requires Ba, Se, Cr, and Ag while New York State also includes Zn, Cr, Cu, Ba, and Sb. Clearly there needs to a better understanding of the toxicity role of these additional elemental contaminants, and, in particular, how they are taken up by the plant and whether they find their way into consumer products.

This workshop will provide a broad perspective and awareness of the current knowledge of elemental contaminants in cannabis/hemp consumer products, communicate their significance, and as a result, educate users, cultivators, processors, testing labs, and regulators within the cannabis/hemp community of their potential risk.

The following topics will be addressed in the workshop:

  • The most current research detailing the mechanisms for metal uptake into a cannabis plant based on growing conditions and soil chemistry.
  • Optimization of analytical methodology used to measure heavy metals in cannabis/hemp consumer products.
  • Lessons learned from regulating heavy metals in drug products and using a scientifically risk-based approach to predict elemental impurities derived from the manufacturing process.
  • Toxicological impact of heavy metals and the industry’s responsibility for ensuring consumer health and safety.
  • The current state of the art research in phytoremediation and phytoextraction techniques.
  • The most recent research in characterizing elemental contaminants in vaping liquids and aerosols produced by electronic nicotine delivery systems (ENDS) and electronic cannabis delivery systems (ECDS).

Scientists at the CDC, FDA, NIST and USP are scheduled to present at this truly groundbreaking event. Each presentation will be 30 minutes in duration, followed by 15 minutes of Q&A and discussion.

The language of the workshop will be English.


To view the technical program (presentation times, paper titles, and presenters’ names), click D37 Metals Workshop Technical Program.


Registration for this event is currently open. The registration fees are listed below.

All Attendees - You must be registered to attend this event. Joining instructions for the virtual workshop will be sent to all registrants no later than June 18, 2021.

Presenters - ASTM Symposia Operations will register all scheduled presenters.

Students - Students are eligible for a discounted fee, provided they are a full-time student, not employed full time and can provide a current and valid university email address. To register as a student for this workshop, please contact ASTM Symposia Operations at

Cancellation - A refund of the workshop fee will be honored only if requested at least 5 business days prior to the start of the workshop. To cancel your registration and request a refund, please contact Symposia Operations at or by calling +1 610-832-9698.

If you have questions concerning online registration, please contact Symposia Operations at or +1 610-832-9698. You may also contact ASTM Technical Support at or 1-877-909-2786 (domestic) or +1 610-832-9578 (international).



On Site



Workshop attendees interested in receiving 1.6 Continuing Education Units (CEUs) should complete a CEU application form in the back of the program booklet after the adjournment of the workshop and submit it to Attendees will only receive credit if they are registered and attend the entire workshop on both days. After your attendance has been verified, a certificate will be sent to the attendee approximately 2-4 weeks after the application has been submitted.


Workshop Chair: Robert Thomas
Scientific Solutions
Office: +1 301-570-2811
Cell: +1 301-717-0900


Committee D37 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. For more information about the committee and its meetings, please visit the Committee D37 webpage. You may also contact the ASTM Staff Manager, Robert Morgan at or by calling +1-610-832-9732.