requirements for certified reference materials and ar grade chemicals for water quality testing during the 2026-27 financial year at the dharwad district level rural drinking water and sanitation division laboratory and the kalghatgi taluk level laboratory in dharwad district. - pottasium dichromate,copper(ii)sulfate pentahydrate,platinum cobalt color reference solution (hazen 500),sodium carbonate,calcium carbonate,sodium chloride nacl,ph buffer10.0,ph buffer 7.00,ph buffer 4.01,turbidity 500 ntu calibration standard,conductivity kcl solution 1.41ms/cm,iron standard, 1000ppm,nitrate standard,1000ppm,sulpate standard, 1000ppm,fluoride standard, 1000ppm,silica gel self indicating 6-20 mesh blue,ethanol,hexane c6h14,toluene,coc. o-phosphoric acid,barium diphenylamine-4 sulfonate,dpd,ferrous ammonium sulphate.,potassium dihydrogen orthoposphate,disodium phosphate,triethanol amine,p & r reagent,sodium hydroxide.,barium chloride.,sodiumsulphate,isopropyl alcohol.,potassium nitrate.,sodium acetate.,magnesium chloride.,nitrate screening method-conc hydrochloric acid ar,hydroxylamine-hydrochloride,potassium per manganate,concentrated. hcl,glacial acetic acid.,ammonium acetate.,phenanthroline monohyrate,concentrated hcl,zirconium oxychloride octahydrate,spadns re-agent,pottassium chromate.,silver nitrate,bromocresol green (powder),methyl red ( powder),concentrated sulphuric acid solution,phenolphathlein indicator solution,methyl orange indicators,ammonium solution,hydroxylamine hydrochloride.,eriochrome blackt,ammonium chloride.,edta di sodium salt