同时检测元素和分子使用激光切除-ICP-MS/MS.
Takafumi Hirata1, Chihaya Kinoshita2,3
1Geochemical Research Center, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan. hrt1@eqchem.s.u-tokyo.ac.jp.
概括
激光除感应合等离子体双重质谱法 (LA-ICP-MS/MS) 快速检测咖啡豆中的元素和分子. 用银离子 (Ag+) 进行阴性化是分析挥发性有机化合物 (VOC) 的最有效方法.
科学领域:
- 分析化学 分析化学
- 材料科学 材料科学 材料科学
- 食品科学 食品科学 食品科学
背景情况:
- 固体材料的元素和分子组成分析对于质量控制和了解材料特性至关重要.
- 分析固体样本中的元素和分子的传统方法通常需要单独的技术,增加分析时间和复杂性.
研究的目的:
- 调查单一ICP-MS/MS与激光切除相结合的单一ICP-MS/MS在咖啡豆中同时进行元素和分子检测的能力.
- 探索和优化从咖啡豆中释放的挥发性有机化合物 (VOCs) 的电离化策略,使用激光诱导的热溶解.
主要方法:
- 采用激光剥离感应合等离子体双重质谱法 (LA-ICP-MS/MS) 来直接分析固体咖啡豆样本.
- 在ICP中通过直接电离检测和使用碰撞/反应电池 (CRC) 技术对VOC的分子检测进行了研究.
- 我们比较了两种VOC电离方法:与离子 (Ar+) 的离子反应和与 (Li+), (Na+) 和银 (Ag+) 离子的电离.
主要成果:
- 成功检测到的元素 (Mg,Ca,Co) 和挥发性有机物 (丁烯,甲, furan 等). 在激光切除后的咖啡豆中.
- 与银离子 (Ag+) 进行的阴性化证明了对VOC电离的优越性能,与Ar+离子反应相比,实现了较低的碎片化和更高的 adduct 生产效率.
- 通过LA-ICP-MS/MS技术,可以快速同时检测元素和分子物种.
结论:
- LA-ICP-MS/MS是一种通用且快速的分析技术,用于同时检测咖啡豆等固体矩阵中的元素和分子.
- 电离,特别是与Ag+,提供了一个有效的方法来电离从LA-ICP-MS/MS的固体样本中释放的VOC.
- 这种方法在食品分析,材料表征和其他需要全面样本分析的领域具有很大的应用潜力.
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