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Selenium - Soil - Continue3 <br />Calculations: <br />Dilution is derived as follows: <br />Xug/25 ml Extr. = 2XUg/50 ml Extr. = 2 Xug/lOg = .2XUg/g <br />Concentration of Se in PPM = <br />Deflection of Sample - Deflections of Blank <br />X.2ug/gX Slope of Curve <br />• <br /> <br />6-106 <br />