corrigendum - procurement of certified reference materials , chemicals and other items as per schedule of requirement .-1 item1 glass fiber filter paper , type gf / c, whatman grade or equivalent ( 100 filter paper / pack ) 2 item2 ammonium standard solution nh4, 1000 mg / l, nh4 pack:500 ml 3 item3 arsenic standard solution as, 1000 mg / l, pack:100 ml 4 item4 boron standard solution b, 1000 mg / l, pack: 100 ml 5 item5 buffer solution traceable to srm from nist, ph 4.0, pack:500 ml 6 item6 buffer solution traceable to srm from nist, ph 7.0, pack: 500 ml 7 item7 buffer solution traceable to srm from nist, ph 9.0, pack: 500 ml 8 item8 cadmium standard solution cd, 1000 mg / l, pack: 100 ml 9 item9 calcium carbonate volumetric standard , pack:50 g 10 item10 calcium standard solution ca, 1000 mg / l, pack:100 ml 11 item11 chromate standard solution cro4, 1000 mg / l, pack: 500 ml 12 item12 chromium standard solution cr, 1000 mg / l, pack: 100 ml 13 item13 copper standard solution, 1000 mg / l, pack: 100 ml 14 item14 fluoride standard solution, 1000 mg / l, pack:500 ml 15 item15 iron standard solution, 1000 mg / l, pack: 100 ml 16 item16 lead standard solution pb, 1000 mg / l, pack: 100 ml 17 item17 manganese standard solution, 1000 mg / l, pack: 100 ml 18 item18 mercury standard solution hg, 1000 mg / l, pack: 100 ml 19 item19 nickel standard solution ni, 1000 mg / l, pack: 100 ml 20 item20 nitrate standard solution no3, 1000 mg / l, pack: 500 ml 21 item21 platinum cobalt colour reference solution ( hazen 500 ) , pack: 250 ml 22 item22 phenol solution, 500μg / ml, ampule of 1 ml 23 item23 phosphate standard solution po4, 1000 mg / l, pack: 500 ml 24 item24 potassium chloride standard solution kcl, pack: 500 gm 25 item25 potassium dichromate volumetric standard solution, pack:80 g 26 item26 potassium hydrogen phthalate volumetric standard solution hoocc6h4cook, pack: 80 g 27 item27 potassium iodate volumetric standard solution, pack:100 g 28 item28 selenium standard solution, 1000mg / l, pack:100 ml 29 item29 sodium carbonate volumetric standard solution, pack: 80 g 30 item30 sodium chloride volumetric standard solution, pack: 80 g 31 item31 sulfate standard solution, 1000 mg / l, pack: 500 ml 32 item32 zinc standard solution, 1000 mg / l, pack:100 ml 33 item33 sodium hydroxide, pack: 250 g 34 item34 calcium chloride, pack: 500 g 35 item35 phosphoric acid ( 85% ) , pack: 500 ml 36 item36 potassium hydroxide, pack: 500 g 37 item37 potassium iodate, pack: 100 g 38 item38 potassium iodide, pack: 100 g 39 item39 potassium sodium tartarate ( rochelle salt ) , pack: 500 g 40 item40 ammonium hydroxide, pack: 25 g 41 item41 dipotassium hydrogen phosphate, pack: 500 g 42 item42 hydrogen peroxide 30 %, pack: 500 ml 43 item43 potassium nitrate, pack: 500 g 44 item44 sodium sulphate, pack: 500 g 45 item45 hexavalent chromium reagent set, 1 pack=100 sachets 46 item46 spands reagent for fluoride test, pack=500 ml 47 item47 nitrate reagent set, 1 pack=100 sachets 48 item48 phosphate reagent set, 1 pack=100 sachets 49 item49 sulphate reagent set, 1 pack=100 sachets