Determination of seven polycyclic aromatic hydrocarbons in water by dispersive liquid-liquid microextraction based on solidification of floating organic droplet with gas chromatography-mass spectrometry
10.19428/j.cnki.sjpm.2020.19587
- VernacularTitle:悬浮固化分散液液微萃取-气相色谱-质谱法测定水中7种多环芳烃
- Author:
Shi-yong CUI
1
;
Zhu-feng FAN
;
Lin-bo CAO
;
Shuo WANG
;
Su-fen JING
Author Information
1. Baoshan Center for Disease Control and Prevention, Shanghai 201901, China
- Publication Type:Research Article
- Keywords:
dispersive liquid-liquid microextraction based on solidification of floating organic droplet;
gas chromatography-mass spectrometry;
polycyclic aromatic hydrocarbons;
water
- From:
Shanghai Journal of Preventive Medicine
2021;33(3):254-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To develop a new method for the simultaneous determination of seven polycyclic aromatic hydrocarbons(PAHs)in water by dispersive liquid-liquid microextraction based on solidification of floating organic droplet(DLLME-SFO)with gas chromatography-mass spectrometry(GC-MS). Methods The experimental conditions of DLLME-SFO were determined with dodecanol as extractant solvent, methanol as dispersive solvent, inonic strength increased by adding 8% NaCl. After vortexed for 1 min and centrifuged at 4 000 r/min for 5 min, the water sample was cooled down in an ice bath till dodecanol became solid and formed a small ball. Then the solidified dodecanol phase was transferred, and directly detected by GC-MS method after it melted. Results Good linearities were obtained for the seven polycyclic aromatic hydrocarbons within the range of 5 μg/L-200 μg/L. The correlation coefficients were above 0.996. The detection limits ranged from 1.6 ng/L to 3.2 ng/L. The average recoveries ranged from 86.2% to 105% and the RSDs from 3.8% to 9.4%. Conclusion The method is sensitive, fast and simple. It has the advantage of little organic solvent consumption, which is friendly to environment and suitable for the detection of seven PAHs in water.
