PDF Publication Title:
Text from PDF Page: 368
NITROGEN, NITRATE-NITRITE Method 353.1 (Colorimetric, Automated, Hydrazine Reduction) STORET NO. Total 00630 1 Scope and ApplicatlOn 1 1 ThIS method IS apphcable to dnnkmg and surface water, and domestIc and mdustnal wastes The applicable range of thIS method IS 001-10 mg/l mtrate-mtnte mtrogen ApproXImately 20 samples per hour can be analyzed 2 Summary ofMethod 2 1 NItrate IS reduced to mtnte WIth hydrazme sulfate and the mtnte (that ongmally present plus reduced mtrate) IS determmed by dlazotlzmg WIth sulfamlamlde and coupling WIth N-(l-naphthyl)-ethylenedlamme dihydrochionde to form a hIghly colored azo dye WhICh IS measured colonmetncally 3 Sample Handhng and PreservatlOn 3 1 AnalysIs should be made as soon as possIble If analysIs can be made wlthm 24 hours, samples should be preserved by refngeratlOn at 4°C When samples must be stored for more than 24 hours, they should be preserved WIth 2 ml ofsulfunc aCId (H2S04) per hter and refngerated 4 Interferences 4 1 Sample color that absorbs m the photometnc range used for analysIs WIll mterfere 42 The apparent N03 and N02concentratlOns vaned ±10 percent WIth concentratlOns of sulfide lOn up to 10 mg/l 5 Apparatus 51 Sampler 52 Mamfold AAI or AAII 53 Proportlomng Pump 54 Heatmg bath 32°C AAI or 37°C AAII 55 Contmuous filter 56 Colonmeter eqUipped WIth an 8 mm, 15 mm or 50 mm flow cell and 529 nm filters 6 Reagents 6 1 Color developmg reagent To approxImately 500 ml of dlstl1led water add 200 ml concentrated phosphonc aCId (sp gr I 834), 10 g sulfamiamide (H2NCJI~02NH2) followed by 08 g N (I-Naphthyl) ethylenedlamme dihydrochionde Dl1ute the solutlOn to 1 hter WIth dIstl1led water and store m a dark bottle m the refngerator ThIS solutlOn IS stable for approxImately 1 month 6 2 Copper sulfate stock solutlOn DIssolve 2 5 g of copper sulfate (CuS04-SH20) m dIst111ed water and dl1ute to 1 hter Approved for NPDES and SDWA Issued 1971 ReIssued WIth reVISIon 1978 353 1-1PDF 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 |