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Homogeneous catalysis for photochemical vapor generation for speciation of inorganic selenium by high performance liquid chromatography-atomic fluorescence spectrometry
Journal of Analytical Atomic Spectrometry ( IF 3.1 ) Pub Date : 2021-09-03 , DOI: 10.1039/d1ja00247c
Mengtian Li 1 , Hui Xia 1 , Jin Luo 2 , Xin Yang 1 , Hui Li 1 , Xingli Liu 1 , Fujian Xu 1
Affiliation  

A simple, sensitive and cost-effective homogeneous catalysis photochemical vapor generation (PVG) system for HPLC separation and atomic fluorescence spectrometry detection was reported herein for the speciation analysis of trace Se(IV) and Se(VI). Homogeneous Cd ions as a catalyst were stable and reliable, without complex nanomaterial synthesis and coating. Under the conditions of 60 μg mL−1 Cd ions, 3.5 m reaction coil, 40% acetic acid and 0.30 mL min−1 of 5 mM Na2CO3–1.3 mM NaHCO3, the online HPLC-Cd-PVG-AFS system enabled us to achieve a calculated detection limit of 0.16 and 0.21 ng mL−1 for Se(IV) and Se(VI), respectively. Moreover, it could also work successfully even in a phosphate separation system. Under the optimized conditions of 60 μg mL−1 Cd ions, 5 m reaction coil, 40% acetic acid and 0.35 mL min−1 of 50 mM Na2HPO3, a detection limit of 0.49/0.78 ng mL−1 for Se(IV)/Se(VI) was achieved.

中文翻译:

高效液相色谱-原子荧光光谱法均相催化光化学气相生成无机硒形态

本文报道了一种用于 HPLC 分离和原子荧光光谱检测的简单、灵敏且经济高效的均相催化光化学蒸汽发生 (PVG) 系统,用于痕量 Se( IV ) 和 Se( VI )的形态分析。均相Cd离子作为催化剂稳定可靠,无需复杂的纳米材料合成和包覆。在 60 μg mL -1 Cd 离子、3.5 m 反应线圈、40% 乙酸和 0.30 mL min -1的 5 mM Na 2 CO 3 –1.3 mM NaHCO 3 条件下,在线 HPLC-Cd-PVG-AFS 系统使我们能够实现的0.16和0.21计算出的检测限纳克毫升-1硒(IV) 和 Se( VI )。此外,它甚至可以在磷酸盐分离系统中成功工作。下60微克毫升的优化条件-1 Cd离子,5米的反应线圈,40%乙酸和0.35毫升分钟-1的50mM的的Na 2 HPO 3,0.49 / 0.78,检测限纳克毫升-1硒(实现了 IV )/Se( VI )。
更新日期:2021-09-22
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