Detection of zinc in pig feed based on the cavities of different shapes combined with LIBSJing Li, Mengqin Huang, Shujia Wu, Zihao Liu, Mingyin Yao, Muhua Liu and Long XueJ. Eur. Opt. Society-Rapid Publ., 20 1 (2024) 1DOI: https://doi.org/10.1051/jeos/2023047