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FLUORIDE Method 340.3 (Colorimetric, Automated Complexone) STORET NO. Total 00951 Dissolved 00950 1 Scope and ApplIcatIOn 1 1 ThIS method IS apphcable to drmkmg, surface and salIne waters, domestIc and mdustnal wastes The apphcable range of the method IS 005 to 15 mg F/l Twelve samples per hour can be analyzed 1 2 For Total or Total DIssolved Fluonde, the Bellack DIstillatIOn must be performed on the samples pnor to analysIs by the complexone method 2 Summary of Method 2 1 Fluonde Ion reacts WIth the red cerous chelate of alIzarm complexone It IS unlIke other fluonde procedures m that a posItIve color IS developed as contrasted to a bleachmg actIOn m prevIous methods 3 Sample Handlmg and PreservatIon 3 1 No specIal reqUirements 4 Interferences 41 Method IS free from most amomc and catIOmc mterferences, except alummum, WhICh forms an extremely stable fluoro compound, AIF6 -3 ThIS IS overcome by treatment WIth 8-hydroxyqumohne to complex the alummum and by subsequent extractIOn WIth chloroform At alummum levels below 02 mg/l, the extractIOn procedure IS not reqUired 5 Apparatus 5 1 Techmcon AutoAnalyzer Umt cons1stmg of 5 1 1 Sampler I 512 Mamfold 5 1 3 ProportIOmng pump 5 1 4 Contmuous filter 5 1 5 Colonmeter eqUipped WIth 15 mm tubular flow cell and 650 nm filters 5 1 6 Recorder eqUipped WIth range expander 6 Reagents 6 1 Sodmm acetate solutIOn DIssolve 272 g (2 moles) ofsodmm acetate m d1stl1led water and dl1ute to 1 hter 6 2 AcetIC aC1d-8-hydroxyqumohne solutIOn DIssolve 6 g of 8-hydroxyqumohne m 34 ml of conc acetIC aCId, and dl1ute to 1hter WIth d1stl1led water Approved for NPDES Issued 1971 3403-1PDF Image | Methods for Chemical Analysis of Water and Wastes
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