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Bromine and iodine in Chinese medical herbs determined via epithermal neutron activation analysis

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Abstract

Nineteen natural herbs and two prescriptions prepared from mixed herbs were analyzed via epithermal neutron activation analysis (ENAA) to evaluate their bromine and iodine concentration. Traditional medical doctors prescribed the samples presented in this work to most Taiwanese children for strengthening their immune systems. Empirical results indicated a wide diversity of bromine in the samples. Yet, the iodine concentration was only around one to tenth or twentieth of the bromine. The maximum daily intake (MDI) for various medical herbs was also widely diversified from one to tenfold on the basis of various criteria. The minimum detectable concentration (MDC) of bromine and iodine found was 0.42±0.14 ppm and 0.067±0.016 ppm, respectively. Compared to that from conventional thermal neutron activation analysis (NAA) for a similar evaluation, the extremely low MDC obtained here was attributed to the large amount of thermal neutron absorption during sample irradiation.

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Authors and Affiliations

  1. School of Medical Imaging Technology, Chung Shan Medical University, Taichung, 402, Taiwan

    Chien-Yi Chen

  2. Nuclear Science and Technology Development Center, National Tsing Hua University, HsinChu, 300, Taiwan

    Yuan-Yaw Wei

  3. Department of Nuclear Medicine Chief, Chung Shan University Hospital, Taichung, 402, Taiwan

    Sheng-Pin ChangLai

  4. Department of Radiological Technology, Chung Tai Institute of Health Sciences and Technology, Takun, Taichung, 406, Taiwan

    Lung-Kwang Pan

Authors
  1. Chien-Yi Chen
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  2. Yuan-Yaw Wei
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  3. Sheng-Pin ChangLai
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  4. Lung-Kwang Pan
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Chen, CY., Wei, YY., ChangLai, SP. et al. Bromine and iodine in Chinese medical herbs determined via epithermal neutron activation analysis. Journal of Radioanalytical and Nuclear Chemistry 257, 405–410 (2003). https://doi.org/10.1023/A:1024708518645

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