“…Quartz album, commonly used in traditional Chinese medicine, is a mined mineral product and as such the levels of toxic elements are important. In a study by Xu 223 30 elements were investigated using ICP-MS. Thirteen samples from different regions of China were digested in HF using MAD. Calcium, Fe, K, Mg, Mn and Ti were the most abundant elements and samples from Fengyang County, Anhui Province, were found to have the lowest levels of toxic elements such as As, Cd, Hg and Pb.…”