Tender For certified reference materials (crm's) for chemical analysis as per annexure-i. note- test cert ificate of the crm from nml must be provided along with the supply. source of item: csir-national metallur gical laboratory, (csir), jamshedpur. crm no. 223.6 a, 241(01 set = 02 no's). [ warranty period: 30 mon ths after the date of delivery ]