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Related Experiment Video

Updated: Jun 25, 2026

Automated 90Sr Separation and Preconcentration in a Lab-on-Valve System at Ppq Level

Automated ⁹⁰Sr Separation and Preconcentration in a Lab-on-Valve System at Ppq Level

Published on: June 6, 2018

Low-level radioactivity proficiency testing program in Taiwan.

Jeng-Jong Wang¹

¹Institute of Nuclear Energy Research, Atomic Energy Council, No. 1000, Wunhua Road, Jiaan Village, Longtan Township, Taoyuan County 32546, Taiwan, ROC. jjwang@iner.gov.tw

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine

|February 27, 2009

Summary

Taiwanese laboratories demonstrated proficiency in radioactivity testing, with acceptable bias and precision. However, traceability issues were noted in 102 results, suggesting potential under- or overestimation of measurement uncertainty.

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Last Updated: Jun 25, 2026

Automated 90Sr Separation and Preconcentration in a Lab-on-Valve System at Ppq Level

Automated ⁹⁰Sr Separation and Preconcentration in a Lab-on-Valve System at Ppq Level

Published on: June 6, 2018

Area of Science:

Environmental Science
Analytical Chemistry
Nuclear Science

Background:

Proficiency testing programs are crucial for assessing laboratory performance in radioactivity measurements.
Accurate quantification of radionuclides like tritium (3H), cobalt-60 (60Co), strontium-90 (90Sr), and cesium-137 (137Cs) is vital for environmental monitoring and public health.
Established quality assurance and quality control (QA/QC) management are essential for reliable analytical data.

Purpose of the Study:

To evaluate the performance of laboratories participating in Taiwan's proficiency testing program for radioactivity analysis from 2004-2007.
To assess bias, precision, and traceability of reported data for various radionuclides.
To identify areas for improvement in laboratory practices and uncertainty estimation.

Main Methods:

Utilized seven types of spiked low-level activity samples for proficiency testing.
Collected and analyzed 711 reported data points for Gross-beta, 3H, 60Co, 90Sr, and 137Cs.
Evaluated laboratory performance based on bias, precision, and traceability criteria.

Main Results:

All reported results demonstrated acceptable bias and precision.
102 out of 711 data points were deemed "Not Acceptable" for traceability.
Laboratories exhibited good proficiency and QA/QC management in routine practices.

Conclusions:

Taiwanese laboratories generally possess strong proficiency in radioactivity analysis.
Traceability remains a challenge, indicating potential issues with measurement uncertainty estimation (under- or overestimation).
Further attention to traceability and uncertainty evaluation is recommended for participating laboratories.