PPT Slide
TECHNIQUE #3 Doping or Spiking Method
Sample to be analysed is spiked with known amount of the analyte phase J
- Weight fraction of phase J in spiked sample
M = mass sample MJD = mass dopant phase J xJM = mass of phase J in undoped sample xJD = weight fraction of dopant = MJD / (M + MJD)
(xJ)D = (xJM + MJD) / (M + MJD) = xJ (1 - xJD) + xJD