通过离子迁移谱法检测和鉴定糖醇甜味剂
Detection and identification of sugar alcohol sweeteners by ion mobility spectrometry.
作者信息
Browne Christopher A, Forbes Thomas P, Sisco Edward
机构信息
Purdue University, 101 Purdue Mall, West Lafayette, IN, USA.
National Institute of Standards and Technology, Materials Measurement Science Division, Gaithersburg, MD, USA.
出版信息
Anal Methods. 2016 Jul 28;8(28):5611-5618. doi: 10.1039/c6ay01554a. Epub 2016 Jun 23.
The rapid and sensitive detection of sugar alcohol sweeteners was demonstrated using ion mobility spectrometry (IMS). IMS provides a valuable alternative in sensitivity, cost, and analysis speed between the lengthy gold-standard liquid chromatography-mass spectrometry (LC-MS) technique and rapid point-of-measurement disposable colorimetric sensors, for the Food and Nutrition industry's quality control and other "foodomics" area needs. The IMS response, characteristic signatures, and limits of detection for erythritol, pentaerythritol, xylitol, inositol, sorbitol, mannitol, and maltitol were evaluated using precise inkjet printed samples. IMS system parameters including desorption temperature, scan time, and swipe substrate material were examined and optimized, demonstrating a strong dependence on the physicochemical properties of the respective sugar alcohol. The desorption characteristics of each compound were found to dominate the system response and overall sensitivity. Sugar alcohol components of commercial products - chewing gum and a sweetener packet - were detected and identified using IMS. IMS is demonstrated to be an advantageous field deployable instrument, easily operated by non-technical personnel, and enabling sensitive point-of-measurement quality assurance for sugar alcohols.
利用离子迁移谱(IMS)实现了对糖醇甜味剂的快速灵敏检测。在食品和营养行业的质量控制及其他“食品组学”领域需求方面,与耗时的金标准液相色谱 - 质谱联用(LC - MS)技术和快速即时检测的一次性比色传感器相比,IMS在灵敏度、成本和分析速度方面提供了一种有价值的替代方案。使用精确喷墨打印的样品评估了赤藓糖醇、季戊四醇、木糖醇、肌醇、山梨醇、甘露醇和麦芽糖醇的IMS响应、特征信号和检测限。研究并优化了包括解吸温度、扫描时间和擦拭底物材料在内的IMS系统参数,结果表明这些参数强烈依赖于各糖醇的物理化学性质。发现每种化合物的解吸特性主导着系统响应和整体灵敏度。使用IMS对商业产品(口香糖和甜味剂包)中的糖醇成分进行了检测和鉴定。结果表明,IMS是一种便于现场部署的仪器,非技术人员也能轻松操作,可实现对糖醇的灵敏即时检测质量保证。