- 作者: 林哲毅,黃賢達*
- 作者服務機構: Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan, R.O.C.
- 中文摘要:
To pursue optimum condition in liquid-liquid-liquid microextraction (LLLME), extraction parameters
dominating extraction efficiency were investigated by theoretical considerations. The theoretical considerations
discussed equilibriummodel for equilibrium LLLME and non-equilibriummodel for dynamic
LLLME. Amethod described here is a dynamic LLLME technique combined with high-performance liquid-
chromatography ultraviolet absorbance detection (HPLC/UV) to determine traces of nitrophenols in
water. Analytical parameters such as organic phase, acceptor phase volume, sample agitation, extraction
time, acceptor phase NaOH concentration, donor phase HCl concentration, salt addition, and absorption
wavelength were identified as variable settings. Relative standard deviation (RSD, 1.8-4.4%), coefficient
of estimation (R2, 0.9994-0.9999), and detection limit (0.032-0.065 ng mL-1) were achieved under the
variable settings. The proposed method was successfully applied to the analysis of a lake water sample,
and the relative recoveries of nitrophenols from spiked water sample were up to 92.5%. The variable settings
of LLLME close to optimization was responsible for an acceptable extraction efficiency. - 英文摘要: --
- 中文關鍵字: Nitrophenols; Liquid-liquid-liquid microextraction; Theoretical consideration; High-performance liquid-chromatography.
- 英文關鍵字: --