Department of Public Health, College of Health Sciences, Kaohsiung Medical University, Kaohsiung, Taiwan.
Department of Fragrance and Cosmetic Science, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan.
Anal Chim Acta. 2018 Jun 20;1010:44-53. doi: 10.1016/j.aca.2018.01.003. Epub 2018 Jan 19.
Thermal desorption electrospray ionization/mass spectrometry (TD-ESI-MS) employing a quickly interchangeable ionization source is a relatively new ambient ionization mass spectrometric technique that has had, to date, only a limited number of applications related to food safety control. With reallocation of resources, this direct-analysis technique has had wider use in food analysis when operated in dual-working mode (pretreatment-free qualitative screening and conventional quantitative confirmation) after switching to an ambient ionization source from a traditional atmospheric pressure ionization source. Herein, we describe the benefits and challenges associated with the use of a TD-ESI source to detect adulterants in processed vegetables (PVs), as a proof-of-concept for the detection of basic colorants. While TD-ESI can offer direct qualitative screening analyses for PVs with detection capabilities lower than those provided with liquid chromatography/UV detection within 30 s, the use of TD-ESI for semi-quantification is applicable only for homogeneous food matrices.
采用快速可互换离子源的热解吸电喷雾电离/质谱（TD-ESI-MS）是一种相对较新的环境电离质谱技术，迄今为止，它在食品安全控制方面的应用数量有限。通过资源再分配，当从传统大气压电离源切换到环境电离源后，该直接分析技术在双工作模式（预处理免定性筛选和常规定量确证）下在食品分析中得到了更广泛的应用。在此，我们描述了使用 TD-ESI 源检测加工蔬菜（PV）中掺杂物的相关优势和挑战，以此为例检测基本着色剂。虽然 TD-ESI 可以在 30 秒内提供比液相色谱/紫外检测更低的检测能力，对 PV 进行直接定性筛选分析，但 TD-ESI 用于半定量分析仅适用于同质食品基质。
