For measuring of analyte in enriched phase using FAAS,
the solvent should have good nebulization and burning
characteristics, low-boiling point and compatibility with direct
injection into FAAS. For this reason, an appropriate diluting
solvent must be added at sedimented-phase. Therefore the
effect of different solvents (350 mL) such as methanol,
ethanol and acetone were tested. Each of these solvents could
dissolve in the sedimented-phase. According to the obtained
results, methanol was preferred to ethanol and acetone due
to its more compatibility with flame atomic absorption
spectrometery and better repeatability in absorbance measurement.