Certified Reference Material Certified reference material are "controls" or standards used to verify analytical measurement techniques, calibrate instruments, and assess the quality and metrological traceability of items. IGRL is an ISOcertified company of Certified Reference Material for analytical testing. Contact us: Indo Global Research Laboratory Tel: 892-054-9613 Mob: 996-899-5868 Email: indoglobalresearchlaboratory@gmail.com, indoglobal@igrl.co.in To know more visit us at: https://igrl.co.in/category/reference-standard/