procurement of laboratory chemicals / reagents:-1 , 10-phenanthroline ( 5 gm each pk . ) ar , acetic acid glacial ( 2 . 5 l . each pack . ) ar , acetone ( 500 ml . each pack ) ar , 1- napthlamine ( 100gm ) , aluminium potassium sulphate ( 500gm pk . ) ar , aluminon ( 25 gm ) ar , aluminium sulphate ( 500 gm pk . ) ar , ammonia solution 25% ( 500 ml each pk ) , ammonium acetate ( 500 gm each ) ar , ammonium chloride ( 500 gm pk ) ar , ammonium molybdate tetrahydrate ( 100 gm pk ) ar , ammonium purpurate ( 5gm ) / murexide ar , ammonium sulphate ( 500gm ) ar , barium chloride ( 500 gm pack ) ar , boric acid ( 500 gm each pack ) , bromo cresol green indicator ( 5gm ) , buffer tablets ph 4 . 0 [ in pkts ] 20 tablets / 20 capsules , buffer tablets ph 7 . 0 [ in pkts ] 20 tablets / 20 capsules , buffer tablets ph 9 . 0 [ in pkts ] 20 tablets / 20 capsules , calcium carbonate ( 500 gm each pk . ) ar , charcoal powder ( 500gm ) , chromotropic acid ( 25gm ) ar , chloroform ( 500ml ) ar , diphenylamine ( 100 gm pk . ) ar , 1 , 5-diphenylcarbazide ( 25 gm pk . ) , e . d . t . a . , disodium salt , dihydrate ( 100 gm pack ) ar , eriochrome black t ( 25 gm each pk . ) ar , eriochrome cyanine r ( 25 gm each pk . ) , ethanol ( 500 ml . each pack ) , ferric chloride anhyrous 500g pack ar , ferrous ammonium sulphate , hexahydrate ( 500 gm pk . ) ar , ferroin indicator ( 100 ml pk ) , glass micofibre circles ( gfc ) 47mm dia . ( 100 circles / pack ) make: merck / whatman / sartorius / axiva , glycerol ( glycerine ) ( 500 ml each pack . ) ar , hydrochloric acid ( 2 . 5 l . each pk . ) ar , iso-proyl alcohol / propan-2-ol ( 500 ml pack . ) ar , hydroxylamine hydrochloride ( 100 gm pk . ) ar , lead acetate , trihydrate ( 500 gm each pack . ) ar , lead carbonate ( 250 gm each pack . ) ar , manganous sulfate , monohydrate ( 500 gm pk ) , mercuric chloride ( 100gm ) ar , mercuric sulphate ( 250gm ) ar , mercuric iodide ( 100 gm each pack . ) ar , methyl alcohol / methanol ( 500 ml ) ar , methylene blue powder 25 gm , methyl orange ( 25 gm each pack ) indicator powder , methyl red ( 25 gm each pack ) indicator powder , nitric acid ( 2 . 5 l each pack . ) ar , ortho phosphoric acid ( 500 ml ) ar , oxalic acid , dihydrate ( 500 gm each pk . ) ar , phenolphthalein indicator powder 100 gm pack ar , phenol red indicator powder ( 25 gm each pack . ) ar , potassium chromate ( 500 gm pk . ) ar , potassium chloride ( 500 gm ) ar , potassium dichromate ( 500 gm pk . ) ar , potassium iodide ( 500 gm pack . ) ar , potassium permanganate crystals ( 500 gm pk . ) ar , potass . sodium tartrate , tetrahydrate 500 gm pack [ rochelle salt ] ar , petroleum ether / spirit ( 500 ml pk . ) ar , p-dimethyl amino benzylidene / rhodanine ( 5gm pack ) , silver nitrate ( 25 gm each pack . ) ar , silver sulphate ( 25 gm each pack . ) ar , sodium acetate ( 500 gm each pack . ) anhydrous ar , sodium arsenate ( 250 gm each pk . ) ar , sodium carbonate ( 500 gm pack . ) anhydrous , ar , sodium bi carbonate ( sod . h2 carbonate ) ( 500g pack . ) anhy . ar , sodium chloride ( 500 gm pack . ) ar , sodium diethyl dithiocarbamate 100 gm ar , sodium hydroxide pellet ( 500 gm pk . ) ar , sodium fluoride ( 500gm ) ar , sodium nitrite ( 500gm ) ar , sodium nitrate crystal ( 500 gm each pack . ) ar , sodium sulphate anhydrous ( 500 gm each pack . ) ar , sodium thio sulphate , pentahydrate ( 500 gm pk . ) ar , spadns ( 5 gm pack . ) ar , stannous chloride / tin ( li ) chloride ( 100gm pack . ) ar , starch soluble ( 500 gm each pack . ) ar , sulfuric acid ( 2 . 5 l each pack . ) ar , sulphanilic acid ( 100 gm each pack . ) ar , universal ph indicator solution ( 100 ml ) , filter paper no . 1 ( sheets ) whatman , filter paper ( 42 no . ) packs whatman , xylenol orange indicator powder ( 5gm ) , zinc chloride ( 500 gm each pack . ) ar , zinc sulphate ( 500 gm each pack . ) ar , ph buffer ( ph 4 . 0 ) liquid coloured 500 ml , nist traceable , ph buffer ( ph 7 . 0 ) liquid coloured 500 ml , nist traceable , ph buffer ( ph 9 ) liquid coloured 500 ml , nist traceable