PDF Publication Title:
Text from PDF Page: 431
54 StandardsulfatesolutlOn(1 00tnl == lobugS04) PreparebyeIther54 1or542 54. f Standard sulfate solutlOn from H 2S 04 ' 6 Procedure 6 1 6 2 6 3 FormatIon ofbanum sulfate turbIdIty 6 1 1 Place 100 ~1 sample, or a SUItable portIon dIluted to 100 mI, mto a 250 Erlenmeyer flask 6 1 2 613 6 1 4 Add exactly 5 ami conCiitlOnmg reagent (5 1). MIXinthe'sttrnngapparatus ., Whde the solutlOn IS bemg stIrred, add a measunng spoonful ofBaCl2 crystals (5 2) and begm tImmg ImmedIately , Stir exactly 1 a mmutes at constant speed 5 4 1 I Standard sulfunc aCId, a IN dtlute 3 a ml conc H2S04to 1 hter wIth dIstdled water StandardIze versus 40 00 ml ofa 05 N Na2C03solution , (5 ~) wIth about 60 ml dI.stilled water by titratmg potentlOmetrlcally to ~~ 'pH about 5 LIft electrodes and rmse mto beaker Bod gently for 3-5 mmutes under a watch glass cover Cool to room temperature Rmse cover glass mto beaker Contmue tItratlOn to the pH mflectlOn pomt Calculate normahty usmg AxB N:::: 53 00 x C where A ' gNa2C03 weIghed mto 1 hter , B= mlNa2C03solutlOn ' " C= mlaCIdusedtomflectlOnpomt , Standard aCId, a 02 N Ddute appropnate amount ofstandard aCId, a 1 N (541 1) to 1 hter (200 00 mlifO 1000 N) Check by standardizatlOn ~ 15 ml ofa 05 N Na2C03solutlOn (5 3) Place 1041 ml standard sulfunc aCId, 002 N (54 12) m a 100 ml volumetnc and ddute to the mark 5 4 1 2 5413 542 Standard sulfate solutlOn from Na2S04 DIssolve 1479 mg anhydrous Na2S04m dIstIlled water I'n a 1 hter volumetrIC flask and ddute to the mark wIth dIstdled water I' 6 1 5 Measurement ofbanum sulfate turbIdIty Ilo rill I '!' 62 1 ImmedIately after the stlrnng penod has ended, pour solutlOn mto absorbance cell 6 2,2 Measure turbIdIty at 30 second mtervals ror;l- mmutes 6 2 3 Record the maXImum reading obtamed m the 4 mmute perIod PreparatIon of cahbratlOn curve 6 3 1 Prepare cahbratlOn curve usmg standard sulfate solutlOn (5 4) 6 3 2 Space standards at 5 mg/l mcrements m the 0-40 mg/l sulfate range 3754-2PDF 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 (Standard Web Page)