Ohio EPA Home

Equation 7.2 RPD = Where: RPD = Relative Percent Difference C1 = The larger value of either the matrix spike or matrix spike duplicate (measured concentration of a spike analyte) C2 = The smaller value of either the matrix spike or matrix spike duplicate For example, if the result for a matrix spike is 7 mg/kg of TCE and result for the matrix spike duplicate is 6 mg/kg, the relative percent difference may be … ................
................