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6. Apparatus 7 8 water 72 Copper sulfate solution Dissolve 100 g CuS04-5H20 m distIlled water and dIlute to 1 hter 7.3 Buffer solutIOn Dissolve 169 g NH4Cl m 143 ml cone NH40H and dIlute to 250 ml With distilled water Two ml should adjust 100 ml ofdistIllate to pH 10 74 Ammoantlpynne solution Dissolve 2 g of4AAP m distIlled water and dIlute to 100 ml 75 PotassIUm ferncyamde solution Dissolve 8 g of K 3Fe(CN)6 m distilled water and dIlute to 100ml 7.6 Stock phenol solution Dissolve 109 phenol m freshly boIled and cooled distilled water anddIluteto 1hter 1ml = 1mgphenol 77 Workmg solution A Dilute 10 ml stock phenol solutIOn to 1 hter With distilled water 1ml= 10ugphenol 78 Workmg solutIOn B DIlute 100 ml ofworkmg solutIOn A to 1000 ml With distIlled water 1ml =1ugphenol 79 Chloroform 7.10 Ferrousammomumsulfate Dissolve11gferrousammomumsulfateIn500mldistilled water comammg 1 ml cone H~04 and dIlute to 1 hter With freshly boIled and cooled distilled water Procedure 6 1 DistillatIOn apparatus, all glass conslstmg of a 1 hter pyrex dlstIlhng apparatus with Graham condenser pH meter Spectrophotometer, for use at 460 or 510 nm 62 63 64 65 66 67 68 Reagents 71 Phosphonc aCid solution, 1 + 9 DIlute 10 m1 of 85% H 3P 04 to 100 m1 With distilled 81 DistIllatIOn 8 1 1 Measure 500 ml sample mto a beaker Lower the pH to approXimately 4 With 1 + 9 H3P04 (7 1), add 5 ml CuS04 solutIOn (72) and traq.sfer to the distillation apparatus Omit addmg H 2P 04 and CuS04 1fsampie was preserved as descnbed m 41 8 1 2 DistIll 450 ml ofsample, stop the distIllatIOn, and when bOlhng ceases add 50 ml of warm distilled water to the flask and resume distillatIon untIl 500 ml have been collected 8 1 3 Ifthe distillate IS turbid, filter through a prewashed membrane filter Direct photometnc method 821 Usmg workmg solutIOn A (77), prepare the followmg standards m 100 m1 volumetnc flasks 8 2 Funnels FIlter paper Membrane filters Separatory funnels, 500 or 1,000 ml Nessler tubes, short or long form 4201-2PDF Image | Methods for Chemical Analysis of Water and Wastes
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