科研之友
微信
新浪微博
Facebook
分享链接
摘要
In this study, a facile route for the preparation of biochar coated fiber via dip method was built. The uniform biochar was produced by thermal decomposition of pine needles under limited or absence of oxygen. The robust adhesion of biochar to the etched stainless steel support was ensured by the viscosity of epoxy resin. The obtained fiber was utilized for headspace solid-phase micro-extraction (HS-SPME) of polychlorinated biphenyls (PCBs) from aqueous solution. The results of orthogonal experiment suggested that the maximum extraction efficiency for the target PCBs compounds was obtained when the extraction temperature, extraction time and the pyrolysis temperature of biochar were 60 A degrees C, 30 min and 400 A degrees C, respectively. Under the optimized conditions, the developed method showed good linearity between 40 and 320 ng L-1 with correlation coefficients (R) in the range of 0.9817-0.9936. The limits of detection (LOD) ranged from 12.3 to 24.3 ng L-1. The reproducibility for fiber-to-fiber obtained on two fibers was in the range of 9.5-20.4 %. The precisions for run-to-run found for 5 extraction times using one fiber in 1 day was less than 27.8 %. The relative standard deviations (RSD) for day-to-day achieved for 5 days was less than 22.4 %.
- 出版日期2016-8
- 单位安徽师范大学
