Development of a certified reference material (CRM) for seven trace elements (Al, Ca, Fe, K, Mg, Na and Ti) in high purity quartz

•A new reference material of quartz is certified for Al, Ca, Fe, K, Mg, Na and Ti.•Within and between bottles homogeneity is carried out by a validated method.•Competent laboratories were selected by PT exercise for the ILCE.•ICP-AES, FAAS, and TXRF were used for the characterization.•Certified valued are traceable to SI units; MUs are evaluated using ISO guides (34–35).