Zhu Yanbei, Asakawa Daiki
National Metrology Institute of Japan, National Institute of Advanced Industrial Sciences and Technology, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8563, Japan.
iScience. 2024 Oct 21;27(12):111138. doi: 10.1016/j.isci.2024.111138. eCollection 2024 Dec 20.
Tandem quadrupole inductively coupled plasma mass spectrometry has the potential capability to measure I at extremely low concentration if spectral interferences from Xe and IH can be eliminated effectively. Ozone was introduced as the reaction gas, resulting significantly improved reactions of (I→IO) and (I→IO ), and permitted the highly sensitive measurement of I as IO and IO , helping eliminate spectral interferences related to Xe and IH . In isotopic ratio (I/I) analysis by measuring (I→IO )/(I→IO ), a blank ratio of 6.7 × 10 can be realized for a solution of 500 μg/mL natural iodine, improved by one order of magnitude than the best performance previous reported. This technique contributes to the measurement of trace level I, a radionuclide of iodine attracting attentions as a geochemical tracer related to the development and civilian use of nuclear energy as well as a regulated radionuclide with guidance levels in drinking water established by the World Health Organization.
如果能有效消除来自氙（Xe）和碘化氢（IH）的光谱干扰，串联四极杆电感耦合等离子体质谱法有潜力测量极低浓度的碘（I）。引入臭氧作为反应气，显著改善了（I→IO）和（I→IO ）的反应，并允许以IO和IO 的形式对碘进行高灵敏度测量，有助于消除与氙和碘化氢相关的光谱干扰。在通过测量（I→IO ）/（I→IO ）进行同位素比率（I/I）分析时，对于500μg/mL天然碘溶液，空白比率可达到6.7×10 ，比之前报道的最佳性能提高了一个数量级。该技术有助于痕量碘的测量，碘作为一种放射性核素，既是与核能开发和平利用相关的地球化学示踪剂，也是世界卫生组织在饮用水中规定了指导水平的受监管放射性核素，备受关注。
