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Notes 1 For levels of cadmmm below 20 ug/l, eIther the SpecIal ExtractIOn Procedure gIven m Part 9 2 of the AtomIc AbsorptIOn methods sectIOn as the furnace techmque, Method 213 2 IS recommended 2 Data to be entered mto STORET must be reported as\ug/l 3 For qualIty control reqUirements and optIOnal recommendatIOns for use m drinkuig water analyses, see part 10 ofthe AtomIC Absorption Methods sectIOn ofthIS manual Precision and Accuracy 68 55 51 18 183 103 19 14 33 50 135 28 29 28 47 An mterlaboratory study on trace metal analyses by atomIC absorptIOn was conducted by the Quahty Assurance and Laboratory EvaluatIOn Branch of EMSL SIX synthetic concentrates contammg varymg levels of alummum, cadmmm, chrommm, copper, Iron, manganese, lead and zmc were added to natural water samples The statIstIcal results for cadmmm were as follows Standard True Values Mean Value DevIatIOn Accuracy as uglliter ug/hter uglliter % BIas ------- 1 Number of Labs 74 73 63 14 168 110 198 71 70 21 -22 78 74 18 -'51 213 1-2PDF Image | Methods for Chemical Analysis of Water and Wastes
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