In Mold Label,In Mould Labels,Iml In Mold Labeling,Iml In Mould Labeling Guang Zhou SUNSEA Printing Technology CO.,LTD. , https://www.sansenprinting.comThe sample was dissolved in phosphoric acid by microwave digestion, and 12 kinds of impurity elements such as Na, K, Ca, Si, Fe, Ti, Mn, Zn, Cu, V, Cr and B in alumina were determined by ICP-AES. The standard sample, the recovery test and the precision test prove that the method is simple, fast, accurate and reliable.