Yurchenko, O. I.; Kalinenko, O. S.; Baklanova, L. V.; Baklanov, A. N.; Dobriyan, M. A.; Chernozhuk, T. V. Double Frequency Ultrasound at Oils and Fats Sample Preparation for Detection of Lead and Cadmium. Khark. Univ. Bull. Chem. Ser. 2014, 126-132.