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Understanding Radiochemistry Testing and The 2016 TNI Standard - ASTM D7283 and EPA 906.0 (Liquid Scintillation Counting)


Using ASTM Method D7283, ASTM Standard Test Method for Alpha and Beta Activity in Water By Liquid Scintillation Counting, and EPA Method 906.0, Tritium in Drinking Water, as examples, this course will provide participants with a general understanding of the theory behind the radioanalytical techniques used, and applicable requirements of TNI 2016 Standard Volume 1 Module 6 (V1M6). A mixture of theory-lecture and interactive exercises using real laboratory data examples will help participants see how analytical processes translate into actions, results, and records that one might encounter in a typical radioanalytical laboratory. It will also address typical challenges that may be encountered. This class will be of benefit both to radiochemistry laboratorians and radiochemistry assessors.

Topics addressed will include:

  • Method scope, application, and limitations
  • Radioactive decay;
  • Radiochemical preparation;
  • Sample test source preparation;
  • Liquid scintillation counter (LSC) set-up, performance checks, efficiency and cross-talk calibrations, and background determinations;
  • Calculation and reporting of results and associated statistics (i.e., counting uncertainty vs. combined uncertainty, critical level vs. minimum detectable concentration vs. SDWA Detection Limit, chemical yield);
  • Common problems and challenges encountered with these methods;
  • TNI Standard Volume 1, Module 6 requirements as they relate to the two methods.

Expected Learning Outcomes:  
Students will complete the course with an understanding of:

  • The general principles behind EPA Methods 906.0 and ASTM D7283, including:
    • Scope and application;
    • The impact of decay and ingrowth in the Methods;
    • Preparation of samples and sample test sources;
    • General principles behind liquid scintillation spectrometry;
      • Set-up, quality control and calibration requirements for gas-flow proportional counters;
      • Background determinations for gas-flow proportional counters;
    • A general familiarity with the calculations of activity concentration, uncertainty, and associated detection statistics.

  • And how V1M6 requirements relate to the Method 904.0 processes:
    • Method scope, application, and limitations;
    • Method validation;
      • Uncertainty;
      • Detection capability;
    • Instrument controls: Instrument set-up, calibration, and performance checks;
    • Sample specific controls: chemical yield;
    • Sample measurements;
    • Batch quality controls;
    • Reviewing and reporting results.

Course Fee:
$195 for TNI members and $220 for non-members; $595 group rate for 5 or more students.

TNI Members: you must be logged-in to the website to receive the member rate.

About Webcasts:
 Upon receipt of your payment, you will receive a special link by e-mail to watch the webcast on your computer. The link is time-limited: you will have full access to the webcast and any associated handouts for 6 months after receipt of payment, at which time the link will expire. Webcasts cannot be downloaded; they are intended for viewing on your computer only during the 6-month window. If you have any questions, please contact Ilona Taunton at

No certificates are provided with webcasts. An additional $15 per person will be charged for anyone who desires a Certificate of Attendance (CoA) or Certificate of Completion (CoC) for the course. A passing score of 2/3 must be received on the Quiz in order to receive CEUs and a CoC. Contact Ilona Taunton at and provide a copy of your course receipt, date of course completion after you have completed the class and copy of your completed quiz.

Group rates are available: Each purchased webcast is to be viewed by only one student. If you would like multiple viewers, separate purchases must be made. A group rate of $595 is available for groups of 5 or more students at a single location. Click hereto purchase this webcast at the group rate.


9.25 hours

This course has been reviewed and approved by TNI.

Presented By:

TNI Radiochemistry Expert Committee

About the Presenter:
The mission of this committee is to maintain the radiochemistry standard (TNI Environmental Sector Volume 1, Module 6) based on public input; to provide technical assistance on issues related to radiochemistry; and, to develop tools that facilitate the implementation of the standard.