PDF Publication Title:
Text from PDF Page: 316
FLUORIDE, TOTAL Method 340.1 (Colorimetric, SPADNS with Bellack Distillation) STORET NO. Total 00951 Dissolved 00950 1 Scope and Apphcatton 11 TillsmethodISapphcabletothemeasurementoffluondemdrmkmg,surface,andsahne waters, domestic and mdustnal wastes 1 2 The method covers the range from 0 1 to about 1 4 mg/l F ThIS range may be extended to 1000 mg/1 usmg the Fluonde Ion Selective Electrode Method (3402) after d1stl1latton 2 Summary of Method 2 I Followmg d1stillatIon to remove mterferences, the sample IS treated with the SPADNS reagent The loss of color resultmg from the reactIOn of fluonde with the zlrconyl- SP ADNS dye IS a functIOn of the fluonde concentratIOn 3 Comments 3 1 32 The SPADNS reagent IS more tolerant of mterfenng matenals than other accepted fluonde reagents Reference to Table 414 1, p 388, Standard Methods for the Exammatton of Waters and Wastewaters, 14th Ed1tIOn, WIll help the analyst decide If distillatIOn IS required The addItion of the highly colored SPADNS reagent must be done with utmost accuracy because the fluonde concentratIOn IS measured as a difference ofabsorbancemtheblankandthesample Asmallerrormreagentadd1tonISthemost promment source oferror m thIS test Care must be taken to avoid overheatmg the flask above the level of the solutIOn ThiS IS done by mamtammg an even flame entIrely under the boilmg flask 4 Apparatus 41 Distillation apparatus A 1-hter round-bottom, long-necked pyrex bOllmg flask, connectmg tube, effiCIent condenser, thermometer adapter and thermometer readmg to 200°C All connectIOns should be ground glass Any apparatus equivalent to that shown m FIgure liS acceptable 42 Colonmeter Oneofthefollowmg 4 2 1 Spectrophotometer for use at 570 nm prov1dmg a hght path ofat least 1cm 4 2 2 Filter photometer eqUIpped WIth a greenIsh yellow filter havmg maxImum transmIttance at 550 to 580 nm and a hght path of at least I cm 51 SulfuncaCid,HzSO4'conc Approved for NPDES and SDWA Issued 1971 Ed1tonal revIsion 1974 and 1978 5 Reagents 340 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 |