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6 Reagents 61 Sulfunc AC1d, Conc Reagent grade 6 1 1 Sulfunc aC1d, 0 5 N Dl1ute 140 ml ofconc sulfunc aC1d to 1 0 hter 62 N1tnc AC1d, Conc Reagent grade oflow mercury content (See Note 3) NOTE 3: If a h1gh reagent blank 1S obtamed, 1t may be necessary to d1st111 the mtnc aC1d 63 Stannous Sulfate Add 25 g stannous sulfate to 250 ml of 0 5 N sulfunc aC1d Th1S m1xture 1S a suspensiOn and should be st1rred contmuously dunng use (Stannous chlonde may be used m place ofstannous sulfate) 64 Sodmm Chlonde-Hydroxylamme Sulfate SolutiOn D1ssolve 12 g of sodmm chlonde and 12 g of hydroxylamme sulfate m d1stl1led water and dl1ute to 100 ml (Hydroxylamme hydrochlonde may be used m place ofhydroxylamme sulfate) 65 Potassmm Permanganate 5% solutiOn, wIv D1ssolve 5 g of potassmm permanganate m 100 ml of d1stl1led water 66 Potassmm Persulfate 5% solutiOn, wlv D1ssolve 5 g ofpotassmm persulfate m 100 ml of d1stl1led water 67 Stock Mercury SolutiOn D1ssolve 0 1354 g of mercunc chlonde m 75 ml of d1stl1led water Add 10 ml of conc mtnc aC1d and adjust the volume to 1000 ml 1 ml = 1 mg Hg AIR PUMP DESICCANT rL..-I ~ ABSORPTION '-----' BUBBLER CELL SAMPLE SOLUTION IN BOD BOTTLE SCRUBBER CONTAINING A MERCURY ABSORBING MEDIA FIGURE 1. APPARATUS FOR FlAMElESS MERCURY 'DETERMINATION 245 1-3PDF Image | Methods for Chemical Analysis of Water and Wastes
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