Lu Qian, Wu Jian-Hong, Yu Qiong-Wei, Feng Yu-Qi
Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan, Hubei 430072, PR China.
College of Chemical Engineering, Wuhan Textile University, Wuhan, Hubei 430200, PR China.
J Chromatogr A. 2014 Nov 7;1367:39-47. doi: 10.1016/j.chroma.2014.09.071. Epub 2014 Oct 5.
In this article, pollen grains were for the first time used as a hydrophilic solid-phase extraction (HILIC-SPE) sorbent for the determination of 16 plant growth regulators (PGRs) in fruits and vegetables. Fourier transform infrared spectroscopy (FT-IR), scanning electronic microscopy (SEM) and nitrogen sorption porosimetry (NSP) were used to investigate the chemical structure and the surface properties of the pollen grains. Pollen grains exhibited an excellent adsorption capacity for some polar compounds due to their particular functional groups. Several parameters influencing extraction performance were investigated. A green and simple HILIC-SPE-method using pollen grain cartridge for purification of fruit and vegetable extractions, followed by ultra-high performance liquid chromatography-triple quadrupole tandem mass spectrometry (UHPLC-MS/MS) was established. Good linear relationships were obtained for 16 PGRs with correlation coefficients (R) above 0.9980. The limits of detection (LODs) of 16 PGRs in cucumber were in the range of 0.01-1.10 μg · kg(-1). Reproducibility of the method was evaluated by intra-day and inter-day precisions with relative standard deviations (RSDs), which were less than 14.4%. We successfully applied this methodology to analyze 16 PGRs in 8 different kinds of fruits and vegetables. The recoveries from samples spiked with 16 PGRs were from 80.5% to 119.2%, with relative standard deviations less than 15.0%.
在本文中,首次将花粉颗粒用作亲水固相萃取(HILIC-SPE)吸附剂,用于测定水果和蔬菜中的16种植物生长调节剂(PGR)。采用傅里叶变换红外光谱(FT-IR)、扫描电子显微镜(SEM)和氮吸附孔隙率测定法(NSP)研究了花粉颗粒的化学结构和表面性质。由于其特定的官能团,花粉颗粒对一些极性化合物表现出优异的吸附能力。研究了影响萃取性能的几个参数。建立了一种绿色简便的HILIC-SPE方法,该方法使用花粉颗粒柱净化水果和蔬菜提取物,然后进行超高效液相色谱-三重四极杆串联质谱(UHPLC-MS/MS)分析。16种PGR获得了良好的线性关系,相关系数(R)高于0.9980。黄瓜中16种PGR的检测限在0.01-1.10μg·kg(-1)范围内。通过日内和日间精密度评估了该方法的重现性,相对标准偏差(RSD)小于14.4%。我们成功地应用该方法分析了8种不同水果和蔬菜中的16种PGR。添加16种PGR的样品回收率在80.5%至119.2%之间,相对标准偏差小于15.0%。