Determination of aniline derivatives in water samples after preconcentration with oxidized multiwalled carbon nanotubes as solid-phase extraction disk
Determination of aniline derivatives in water samples after preconcentration with oxidized multiwalled carbon nanotubes as solid-phase extraction disk
复制标题
氧化多壁碳纳米管固相萃取盘预富集测定水样中苯胺衍生物
DOI：
10.1007/s11705-012-1298-x
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
K. Ohta
中科院分区：
文献类型：
--
作者：
H. Katsumata;Y. Oda;S. Kaneco;T. Suzuki;K. Ohta
采用氧化多壁碳纳米管（OMWCNTs）制成固相萃取（SPE）盘，建立了一种灵敏、选择性好的苯胺衍生物（2-NA、4-NA、2，4-DCA）的预富集方法。苯胺类化合物被萃取到OMWCNT盘上，然后用高效液相色谱法（HPLC）和紫外检测器进行测定。对分析物回收率的几个参数进行了研究。实验结果表明，当溶液pH为8时，使用200 mL含2 μg苯胺和10 mL乙腈/乙醇（8/2，v/v）的验证溶液作为洗脱液，可以进行定量分析。在最佳条件下，5次测定的相对标准偏差分别为7.5%（2-NA）、6.5%（4-NA）和3.8%（2，4-DCA）。各分析物的线性范围为0.5 ng·mL-1 ~ 15 ng·mL-1，相关系数良好。2-NA、4-NA和2，4-DCA的检出限（3S/N）分别为30 pg·mL-1、31 pg·mL-1和26 pg·mL-1。该方法成功地应用于河水中苯胺类化合物的测定，具有较高的精密度和准确度。
A sensitive and selective preconcentration method using solid-phase extraction (SPE) disk made from oxidized multiwalled carbon nanotubes (OMWCNTs), has been developed for the determination of aniline derivatives, such as 2-nitroaniline (2-NA), 4-nitroaniline (4-NA), and 2,4-dichloroaniline (2,4-DCA) in water samples. Anilines were extracted onto OMWCNT disk and then determined by high performance liquid chromatography (HPLC) with UV detector. Several parameters on the recovery of the analytes were investigated. The experimental results showed that it was possible to obtain quantitative analysis when the solution pH was 8 using 200 mL of validation solution containing 2 μg of anilines and 10 mL of acetonitrile/ethanol (8/2, v/v) as an eluent. Relative standard deviations for five determinations were 7.5% (2-NA), 6.5% (4-NA) and 3.8% (2,4-DCA) under optimum conditions. The linear range of calibration curves were 0.5 ng·mL−1to 15 ng·mL−1for each analyte with good correlation coefficients. The detection limits (3S/N) of 2-NA, 4-NA and 2,4-DCA were 30 pg·mL−1, 31 pg·mL−1and 26 pg·mL−1, respectively. Our method was successfully applied to the determination of aniline compounds in river water sample with high precision and accuracy.