supply of chemicals for crm 12 parameters nabl for district laboratory , dhar , sodium carbonate standard 0 . 1 n , traceable to srm from nist , make:- iso / iec 17034 certified or loba , calcium standard 1000 mg / lit traceable to srm from nist make:- iso / iec 17034 or merck , calcium carbonate standard 1000 mg / lit traceable to srm from nist make:- iso / iec 17034 or merck , chloride standard 500 mg / lit traceable to srm from nist make:- iso / iec 17034 certified or merck , fluoride standard 100 mg / lit thermo orion traceable to srm from nist make:- iso / iec 17034 certified or merck , nitrate standard 1000 mg / lit make iso / iec 17034certified or merck , conductivity standard 1470 micro mhos make iso / iec 17034 certified or merck , ph 4 . 0 make iso / iec 17034 certified or merck , ph 7 . 0 make iso / iec 17034 certified or merck , ph 9 . 2 make iso / iec 17034 certified or merck , iron standard 1000 mg / lit make iso / iec 17034certified or merck , manganese standard 100 mg / lit make iso / iec 17034certified or merck , turbidity standard 1000 ntu make iso / iec 17034certified or sigma entrich , sulphate standard 100 mg / lit make iso / iec 17034certified or merck , colour standard 500 hazen make iso / iec 17034 certified or merck , tisab iii thermo orion fluoride , absolute alcoho / ethyl alcohol , sodium chloride a . r , make merck emparta , glycerol a . r make merck emparta , hyrochloric acid ar make merck emparta , ammonium acetate ar make merck emparta , acetic acid glacial gr make merck emparta , hydroxyl amine hyderchloride a r make merck emparta , ammonium per sulphate make merck emparta , 1:10 phenolthroline a . r make merck emparta , ammonium chloride a r make merck emparta