Study of Stainless Steel Solid Phase Microextraction Fiber for Selective Absorption of Impurities in Gutter Oil
10.11895/j.issn.0253-3820.150217
- VernacularTitle:选择性吸附地沟油杂质的不锈钢固相微萃取头研究
- Author:
Qing LI
;
Xiaolan HUANG
;
Xiaoshan LIN
;
Huiqin WU
- Publication Type:Journal Article
- Keywords:
Electrochemical corrosion;
Stainless steel;
Solid phase microextraction;
Gutter oil;
Characteristic impurities;
Gas chromatography-mass spectrometry
- From:
Chinese Journal of Analytical Chemistry
2015;(9):1422-1428
- CountryChina
- Language:Chinese
-
Abstract:
A special solid phase micro extraction ( SPME ) fibre was successfully attained by coating with a special adsorptive material on a porous stainless steel support. And the porous stainless steel support was prepared by electrochemical corrosion for the first time. The optimized erosion condition in this research was as follows: the current intensity of 30 mA, the stainless steel was etched in 2 mol/L hydrochloride solution for 1 min, then sonicated for 3 min; these procedures repeated 5 times. Meanwhile, the treated fiber coated 35 times in the sorbent solution with concentration of 5% ( m/V) in dichloromethane. The SPME fibre was applied to the analysis of gutter oil samples, and the performance of the SPME fibre for the headspace solid phase micro extraction of the exogenous impurities in gutter oil was specific, durable, stable and low-cost. The four detected trace level characteristic impurities in certain gutter oil were given as follows:42 . 7 mg/kg for acetic acid, 21. 6 mg/kg 3-butenenitrile, 71. 8 mg/kg carbon disulfide and 2. 8 mg/kg allylisothiocyanate.
