Method validation for determination of thallium by inductively coupled plasma mass spectrometry and monitoring of various foods in South Korea

Yeon Hee Kim, Wook Jin Ra, Solyi Cho, Shinai Choi, Bokyung Soh, Yongsung Joo, Kwang Won Lee

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Thallium (Tl) is a rare element and one of the most harmful metals. This study validated an analytical method for determining Tl in foods by inductively coupled plasma mass spectrom-etry (ICP-MS) based on food matrices and calories. For six representative foods, the method’s correlation coefficient (R2) was above 0.999, and the method limit of detection (MLOD) was 0.0070– 0.0498 µg kg−1, with accuracy ranging from 82.06% to 119.81% and precision within 10%. We investigated 304 various foods in the South Korean market, including agricultural, fishery, livestock, and processed foods. Tl above the MLOD level was detected in 148 samples and was less than 10 µg kg−1 in 98% of the samples. Comparing the Tl concentrations among food groups revealed that fisheries and animal products had higher Tl contents than cereals and vegetables. Tl exposure via food intake did not exceed the health guidance level.

Original languageEnglish
Article number6729
JournalMolecules
Volume26
Issue number21
DOIs
Publication statusPublished - 2021 Nov 1

Keywords

  • Food contamination
  • ICP-MS
  • Risk assessment
  • Thallium
  • Trace element

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemistry (miscellaneous)
  • Molecular Medicine
  • Pharmaceutical Science
  • Drug Discovery
  • Physical and Theoretical Chemistry
  • Organic Chemistry

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