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Interferences 1 The 352 4 nm wavelength IS less susceptIble to spectral mterference and may be used Notes "1 The calIbratIOn curve IS more lInear at thIS wavelength, however, there IS some loss of sensItIvIty For levels of mckel below 100 ug/1, eIther the SpecIal ExtractIOn Procedure, gIven m part 9 2 of the Atomic AbsorptIOn Methods sectIOn or the furnace techmque, Method 249 2, IS recommended 2 Data to be entered mto STORET must be reported as ug/i 3 The heptoxime method may also be used (Standard Methods, 14th EdItIOn, p 232) Precision and Accuracy 1 In a smgle laboratory (EMSL), usmg a mIxed mdustrIal-domestIc waste effluent at concentratIOnsof020,10and50mgNI/1,thestandarddevIatIonswere ±O011, ±O02 and :1:004, respectIvely RecoverIes at these levels were 100%, 97% and 93%, respectIvely 2491-2PDF Image | Methods for Chemical Analysis of Water and Wastes
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