liquid-liquid extraction; Gas chromatography/mass spectrometry; Tetraethyl lead; surface water
摘要:
A method for the determination of tetraethyl lead in water by liquid -
liquid extraction coupled with gas chromatography /mass spectrometry ( GC/MS)
was established. Extraction solvent was optimized,The result showed that,CH2Cl2
was selected as extraction solvent,the amount of sodium chloride added was 10 g.
Under the optimum conditions,the limit of detection was 0.03 μg /L,the calibration
graph was linear in the range of 0.20~10.0 μg /L, with the correlation coefficients of
0.9999. The recoveries of the method were 89.5%~101.7%,and the relative standard
deviations ranged from 3.7%~5.9% 。