Fan Hui, Smuts Jonathan, Walsh Phillip, Harrison Dale, Schug Kevin A
Department of Chemistry & Biochemistry, The University of Texas at Arlington, Arlington, TX, USA.
VUV Analytics, Inc., Austin, TX, USA.
J Chromatogr A. 2015 Apr 10;1389:120-7. doi: 10.1016/j.chroma.2015.02.035. Epub 2015 Feb 28.
A new vacuum ultraviolet detector for gas chromatography was recently developed and applied to multiclass pesticide identification. VUV detection features full spectral acquisition in a wavelength range of 115-240nm, where virtually all chemical species absorb. VUV absorption spectra of 37 pesticides across different classes were recorded. These pesticides display rich gas phase absorption features across various classes. Even for isomeric compounds, such as hexachlorocyclohexane (HCH) isomers, the VUV absorption spectra are unique and can be easily differentiated. Also demonstrated is the ability to use VUV data analysis software for deconvolution of co-eluting signals. As a universal detector, VUV provides both qualitative and quantitative information. It offers high specificity, sensitivity (pg on-column detection limits), and a fast data acquisition rate, making it a powerful tool for multiclass pesticide screening when combined with gas chromatography.
最近开发了一种用于气相色谱的新型真空紫外探测器，并将其应用于多类农药的鉴定。真空紫外检测的特点是在115 - 240nm波长范围内进行全光谱采集，几乎所有化学物质都会在此范围内吸收。记录了37种不同类别的农药的真空紫外吸收光谱。这些农药在不同类别中呈现出丰富的气相吸收特征。即使对于同分异构体化合物，如六氯环己烷（HCH）异构体，其真空紫外吸收光谱也是独特的，并且很容易区分。还展示了使用真空紫外数据分析软件对共洗脱信号进行解卷积的能力。作为一种通用探测器，真空紫外提供定性和定量信息。它具有高特异性、灵敏度（柱上检测限为皮克）和快速的数据采集速率，与气相色谱结合时，使其成为多类农药筛选的强大工具。
