Article pubs.acs.org/JAFC
Assessment of Homogeneity and Minimum Sample Mass for Cadmium Analysis in Powdered Certified Reference Materials and Real Rice Samples by Solid Sampling Electrothermal Vaporization Atomic Fluorescence Spectrometry Xuefei Mao,†,‡ Jixin Liu,§ Yatao Huang,†,‡ Li Feng,§ Lihua Zhang,†,‡ Xiaoyan Tang,†,‡ Jian Zhou,†,‡ Yongzhong Qian,†,‡ and Min Wang*,†,‡ †
Institute of Quality Standard and Testing Technology for Agri-products, Chinese Academy of Agricultural Sciences, Beijing 100081, China ‡ Key Laboratory of Agri-food Safety and Quality, Ministry of Agriculture, Beijing 100081, China § Beijing Titan Instruments Company, Limited, Beijing 100015, China ABSTRACT: To optimize analytical quality controls of solid sampling electrothermal vaporization atomic fluorescence spectrometry (SS-ETV-AFS), the homogeneity (HE) of rice samples and their minimum sample mass (M) for cadmium analysis were evaluated using three certified reference materials (CRMs) and real rice samples. The effects of different grinding degrees (particle sizes
