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 0.12??gL-1 and 1.0??gkg-1, respectively. The perchlorate concentration in all the samples was above the LOQ. The perchlorate detection data is given as follows: 1.99-6.41??gL-1 (n=37, mean concentration=4.59??0.17??gL-1) for dairy milk and 1.49-33.3??gkg-1 (n=26, mean concentration=7.83??0.22??gkg-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. ?? 2010 Elsevier Ltd.
Her, N., Kim, J., & Yoon, Y. (2010). Perchlorate in dairy milk and milk-based powdered infant formula in South Korea. Chemosphere, 81(6), 732–737. https://doi.org/10.1016/j.chemosphere.2010.07.031