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5. Typeofflame Fuelnch Analysis Procedure 1 For analysIs procedure and calculatIon, see "DIrect AspiratlOn", part 9 1 of the AtomIC AbsorptlOn Methods sectlOn of thIS manual Interferences 1 AlummumISpartIallyIomzedmthemtrousoXIde-acetyleneflame ThIsproblemmaybe controlled by the additlOn ofan alkall metal (potasslUm, 1000 ug/ml) to both sample and standard solutlOns \ Notes 1 The followmg hnes may also be used 308 2 nm RelatIve SensItIvIty 1 396 2 nm Relative SensItIvIty 2 394 4 nm Relative SensItivIty 2 5 2 Data to be entered mto STORET must be reported as ug/l 3 For concentratlOns ofalummum below 0 3 mg/l, the furnace procedure (Method 202 2) IS recommended 4 The Enochrome cyamne R colonmetnc method may also be used The optimum range fortInsmethodhesbetween20and300ug/l (StandardMethods,14thEdItion,p 171) In the absence of fluondes and complex phosphates, a detectlOn 11mlt of 6 ug/l IS pOSSIble Precision and Accuracy 1 Number of Labs An mterlaboratory study on trace metal analyses by atomIC absorptlOn was conducted by the Quahty Assurance and Laboratory EvaluatlOn Branch of EMSL SIX synthetIc concentrates contammg varymg levels of alummum, cadmlUm, chromlUm, copper, Iron, manganese, lead and zmc were added to natural water samples The statistical results for alummum were as follows True values ug/hter Mean Value DevIatIon Accuracy as ug/hter %BIas 299 6 3 391 - 0 1 202 - 7 4 272 ~6 8 1205 1004 500 625 ug/hter , 38 38 37 37 22 35 96 108 175 21 15 109 168 626 1281 1003 463 582 2021-2PDF Image | Methods for Chemical Analysis of Water and Wastes
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