bids are invited for lab chemicals 1,10 phenanthroline , acetone - acetone ar grade or equivalent , ammonia solution , ammonium chloride , anhydrous sodium sulphate , barium chloride , buffer tablets - buffer tablets ph 40 , buffer tablet - buffer tablet ph7 , buffer tablets - buffer tablets ph 92 , calcium carbonate , calcium chloride , chloroform - chloroform ar grade or equivalent , chlorotex reagent , hydrochloric acid - hydrochloric acid ar or eq , eriochrome black t - erio chrome black t , edta - edta ar , ethyl alcohol , filter paper - filter paper tss measurement 0.45 microns , glacial acetic acid , glycerol , hydroxylamine hydrochloride , ferrous ammonium sulphate , manganese sulphate monohydrate , methanol , methyl orange indicator solution , nbutanol , ordinary filter paper , patton and reeders indicator , phenolphthalein , potassium thiocyanate , potassium chromate indicator , potassium iodate , iodine ar resublimed , potassium iodide , salicylic acid ar , silver nitrate ules , sodium acetate , sodium azide , sodium bi carbonate , sodium carbonate , sodium chloride - sodium chloride ar grade , sodium hydroxide , sodium iodide , sodium sulphite , sodium thio sulphate , starch powder , sulfamic acid , sulphuric acid , toluene - toluene ar grade or equivalent , zinc acetate , xylene , whatman filter paper - whatman filter paper no 42 , tptz - 2,4,6 tri2pyridyl 1,3,5 triazine tptz total quantity : 269185