supply of certified reference material ( crms ) for environmental laboratory, cmpdi ri-iv, nagpur:-ammonium standard solution 1000 mg / l , nh4 pack: 500 ml , aluminium standard solution 1000 mg / l , al pack: 100 ml , boron standard solution 1000 mg / l , b pack: 100 ml , buffer solution ph 4 . 00 pack: 500 ml , buffer solution ph 7 . 00 pack: 500 ml , buffer solution ph 9 . 00 pack: 500 ml , cadmium standard solution 1000 mg / l cd pack: 100 ml , calciun carbonate pack: 50 gm , calcium standard solution 1000 mg / l ca pack: 100 ml , chromate standard solution 1000 mg / l cro4 pack: 500 ml , chromium standard solution 1000 mg / l cr pack: 100 ml , copper standard solution 1000 mg / l , cu pack: 100 ml , fluoride standard solution 1000 mg / l , f pack: 100 ml , holmium ( iii ) oxide filter pack: 1 , holmium ( iii ) oxide solution pack: 100 ml , iron standard solution 1000 mg / l , fe pack: 100 ml , lead standard solution 1000 mg / l , pb pack: 100 ml , magnesium standard solution 1000 mg / l , mg pack: 500 ml , manganese standard solution 1000 mg / l , mn pack: 100 ml , mercury standard solution 1000 mg / l , hg pack: 100 ml , nitrate standard solution 1000 mg / l , no3 pack: 500 ml , nickel standard solution 1000 mg / l , ni pack: 100 ml , phosphate standard solution 1000 mg / l , po4 pack: 500 ml , potassium hydrogen phthalate ( khp ) standard , hoocc6h4cook pack: 80 gm , potassium standard solution 1000 mg / l , k pack: 100 ml , platinum cobalt color pack: 250 ml , selenium standard solution 1000 mg / l , se pack: 100 ml , sulfate standard solution 1000 mg / l , so4 pack: 500 ml , sodium nitrate pack: 500 gm , sodium standard solution , 1000 mg / l na pack: 500 ml , sulfide whole volume pack: 500 ml , turbidity solution 1000 ntu pack: 100 ml , zinc standard solution 1000 mg / l , zn pack: 100 ml