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TITANIUM Method 283.1 (Atomic Absorption, direct aspiration) Optimum ConcentratIOn Range: SensItivity: 2 mg!l Detection LImIt: 0 4 mg!l Preparation of Standard Solution STORET NO. Total 01152 Dissolved 01150 Suspended 01151 5-100 mg!l usmg a wavelength of365 3 nm I 2 3 Sample 1 Sample 1 Stock solutIOn DIssolve 1 000 g of tItamum metal (powder or small pIeces) In 200 ml 6N HCI Heat to near lOoelc Ito effect dIssolution Cool and dIlute to 1 lIter wIth deIOmzed dIstilled water (1 ml =I mg TI (1000 mg/l) PotassIUm chlonde solutIOn DIssolve 95 g potassIUm chlorIde, KC1, m dIstIlled water and make up to 1 lIter Prepare dIlutIons of the stock titamum SolutIon to be used as calIbratIOn standards at the time of analysIs The calIbratIon standards should be prepared usmg the same type of aCId and at the same concentratIon as WIll result m the sample to be analyzed eIther dIrectly or after processmg To each 100 ml of standard and sample alIke, add 2 ml of potassIUm chlOrIde solutIOn Preservation For sample handlIng and preservatIOn, see part 4 1 of the AtomIC AbsorptIOn Methods sectIOn of thIS manual PreparatIOn The procedures for preparation of the sample as gIven m parts 4 1 1 thru 4 1 3 of the AtomIC AbsorptIOn Methods sectIOn of thIS manual have been found to be satIsfactory WIth the followmg modIficatIon For processmg total and suspended tItamum, concentrated H2S04 (2 ml per 100 ml offinal dIlutIOn) must be added m addItIOn to the mtnc aCId Reflux the sample addmg addItional mtnc aCId as needed When solubIlIzatIOn IS complete, heat until the appearance of S03 fumes Cool and add suffiCIent dIstIlled mtnc aCId so that the final dilutIOn contams 05% (v!v) HN03 Instrumental Parameters (General) 1 2 3 Titamum hollow cathode lamp Wavelength 365 3 nm Fuel Acetylene Approved for NPDES Issued 1974 283 1-1PDF Image | Methods for Chemical Analysis of Water and Wastes
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