Determination and identification of titanium dioxide nanoparticles in confectionery foods, marketed in South Korea, using inductively coupled plasma optical emission spectrometry and transmission electron microscopy - Namhoon Kim; Changkyu Kim; Soyoung Jung; Youngae Park; Youngju Lee; Juyeon Jo; Misun Hong; Sangmi Lee; Younghee Oh; Kweon Jung (Food Additives & Contaminants: Part A, 2018)