Perchlorate in dairy milk and milk-based powdered infant formula in South Korea

Namguk Her, Jongsung Kim, Yeomin Yoon

Research output: Contribution to journalArticlepeer-review

47 Scopus citations

Abstract

Perchlorate has been detected in dairy milk and milk-based powdered infant formula samples from many different provinces of South Korea. A total of 37 dairy milk samples from 12 different brands and 26 milk-based powdered infant formula samples from four different brands were tested for the presence of perchlorate. These brands and their products, which are analyzed in this study, cover over 95% of the dairy milk and milk-based powdered infant formula market share in South Korea, which has a population of approximately 50 million inhabitants. Perchlorate was explicitly detected by ion chromatography tandem mass spectrometry; the limit of quantification (LOQ) for dairy milk and milk-based powdered infant formula was 0.12μgL-1 and 1.0μgkg-1, respectively. The perchlorate concentration in all the samples was above the LOQ. The perchlorate detection data is given as follows: 1.99-6.41μgL-1 (n=37, mean concentration=4.59±0.17μgL-1) for dairy milk and 1.49-33.3μgkg-1 (n=26, mean concentration=7.83±0.22μgkg-1) for milk-based infant formula. This study provides increasing evidence that perchlorate commonly occurs in dairy products, presumably as the result of perchlorate intake by dairy cattle from water and feed.

Original languageEnglish
Pages (from-to)732-737
Number of pages6
JournalChemosphere
Volume81
Issue number6
DOIs
StatePublished - Oct 2010

Keywords

  • Dairy milk
  • Infant formula
  • Occurrence
  • Perchlorate
  • South Korea

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