text: The effectiveness of a dispersant may be analyzed with the following equations. The Area refers to the area under the absorbance/wavelength curve, which is determined using the trapezoidal rule. The absorbances are measured at 340, 370, and 400 nm.
  Area = 30(Abs + Abs)/2 + 30(Abs + Abs)/2           (1)
  The dispersant effectiveness may then be calculated using the equation below.
  Effectiveness (%) = Total oil dispersed x 100/(ρV)
  * ρ = density of the test oil (g/L)
  * V = volume of oil added to test flask (L)
  * Total oil dispersed = mass of oil x 120mL/30mL
  * Mass of oil = concentration oil x V
  * V = final volume of DCM-extract of water sample (0.020 L)
  * Concentration of oil = area determined by Equation (1) / slope of calibration curve