PDF Publication Title:
Text from PDF Page: 295
53 54 55 56 57 ,~Ir Standard ferrous ammomum sulfate (FAS) tItrant DIssolve 1106g Mohr's salt Fe(NH4)2(S04)2-6H20, m dlstllied water contammg 1 ml of 1 + 3 H2S04(54) and make up to 1 hter wIth freshly bolled and cooled dlstllied water Stable for one month Check WIth tltratlOn by standard potassmm dlchomate (5 5) The FAS tItrant IS eqmvalent to 100 ug ClI1 00 ml SulfuncaCIdsolutlOn(1+3) SlowlyaddonepartofH2S04(sp gr 184)tothreepartsof dIstIlled water PotasslUm dIchromate (0 1000N) DIssolve 4 904 g potasslUm dIchromate (K2Cr20~)I n dIstllled water and dllute to 1 hter Potassmm IodIde, KI Crystals Sodmm Arsemte SolutlOn Place 500 mg of sodmm arsemte (NaAs02) m a flask and dllute to 100 ml WIth dlstllied water 6 Procedure 61 ThIS procedure gives a convement dIrect readmg (ml tItrant = mg!l CI) up to 4 mg!l An ahquot should be dlluted to 100 mllfmgher concentratlOns are present 62 Place 5 ml ofphosphate buffer (5 1) m a tltratlOn flask 63 Add 5 ml ofDPD mdlcator (5 2) 64 Add approxlmately 1g ofKI (5 6) on a scoop 65 Add 100 ml ofsample 66 WaIt2mmutes 67 TItrate WIth FAS (53) until the red color IS dIscharged Record the volume of titrant used 68 IfOXIdIzed manganese IS present 68 1 Place 5 ml ofphosphate buffer (5 1) m a tItration flask 6 8 2 Add one small crystaI of potassmm lOdlde (5 6) 6 8 3 Add 05 ml ofsodmm arsemte SolutIon (5 7) 684 Add100mlofsample MIX 685 Add5mlDPDmdlcator(52) MIX 6.86 TItrate wth FAS (53) until the red color IS dIscharged Record the volume of tItrant used 7 CalculatlOns 71 The ml of FAS tItrant IS equal to the mg!l CI If OXIdIzed manganese was present, subtract the ·amount of tItrant used m 6 8 6 from the amount of tItrant used m 6 7 to obtaIn the mg!l Cl 8. PreCIsIon and Accuracy Nmeteen laboratones analyzed prepared samples of 0 64 and 1 83 mg!l CI The relatIve standard deVIatIons were 192 and 94% respectIvely and the relative errors were 8 1 and 43% respectIvely 3304-2PDF Image | Methods for Chemical Analysis of Water and Wastes
PDF Search Title:
Methods for Chemical Analysis of Water and WastesOriginal File Name Searched:
epa600_4_79_020.pdfDIY PDF Search: Google It | Yahoo | Bing
CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
Heat Pumps CO2 ORC Heat Pump System Platform More Info
| CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com | RSS | AMP |