bids are invited for electrode solutions and calibration standards - ammonia electrode filling solution 60ml , electrode solutions and calibration standards - ammonia isa 500ml , electrode solutions and calibration standards - fluoride electrode filling solution 5x60ml , electrode solutions and calibration standards - nitrate electrode filling solution 5x60ml , electrode solutions and calibration standards - nitrate isa 475ml , electrode solutions and calibration standards - tisab iii 475ml , electrode solutions and calibration standards - ammonium standard solution (500 ml) , electrode solutions and calibration standards - bod 1000 mg/l calibration standard 500ml , indicators and color development reagents - bromo cresol green indicator solution 125ml , indicators and color development reagents - eriochrome black t 25g , indicators and color development reagents - ferroin indicator solution 100ml , indicators and color development reagents - phenolphthalein indicator solution 125ml , indicators and color development reagents - n-(1-naphthyl) ethylenediamine dihydrochloride 5g , indicators and color development reagents - starch soluble 500g , indicators and color development reagents - curcumin crystalline 10g , indicators and color development reagents - ammonium molybdate 100g , indicators and color development reagents - l-ascorbic acid 500g , indicators and color development reagents - antimony potassium tartrate 500g , analytical salts and general laboratory chemicals - ammonium chloride excelar 500g , analytical salts and general laboratory chemicals - barium chloride 500g , analytical salts and general laboratory chemicals - boric acid 500g , analytical salts and general laboratory chemicals - calcium carbonate sq 500g , analytical salts and general laboratory chemicals - di-potassium hydrogen phosphate excelar 500g , analytical salts and general laboratory chemicals - di-sodium hydrogen orthophosphate anh er 500g , analytical salts and general laboratory ch