| Title: | Determination of trace tellurium by photochemical vapor generation-atomic fluorescence spectrometry using bifunctional Co-MOF-74 for preconcentration and sensitization |
| Author(s): | Lu Y; Li C; Tian Y; Hu J; Hou X; |
| Address: | "Analytical & Testing Center, Sichuan University, Chengdu, Sichuan, 610064, China. Analytical & Testing Center, Sichuan University, Chengdu, Sichuan, 610064, China. Electronic address: hujing2019@scu.edu.cn. Analytical & Testing Center, Sichuan University, Chengdu, Sichuan, 610064, China; Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064, China. Electronic address: houxd@scu.edu.cn" |
| DOI: | 10.1016/j.aca.2023.340859 |
| ISSN/ISBN: | 1873-4324 (Electronic) 0003-2670 (Linking) |
| Abstract: | "The determination of trace tellurium in real samples with complicated matrix can be rather challenging due to the low abundance and interferences. Herein, we report a new method for the highly sensitive detection of Te(IV) by photochemical vapor generation-atomic fluorescence spectrometry (PVG-AFS), utilizing Co-MOF-74 as an adsorbent and a precursor of Co(2+) ion sensitizer for preconcentration and enhanced PVG efficiency. The synthesized Co-MOF-74 can completely adsorb Te(IV) within 10 min in a wide pH range. Following filtration and re-suspension in a dilute solution of formic and acetic acid, the adsorbed Te(IV) was converted to volatile compounds under the UV irradiation and swept to AFS for detection. A limit of detection of 0.08 ng/mL for Te(IV) was obtained after a 50-fold preconcentration. The proposed method was used for analysis of various natural water samples for trace Te(IV), with satisfactory spike recoveries achieved" |
| Keywords: | Atomic fluorescence spectrometer Metal organic frameworks Photochemical vapor generation Preconcentration Tellurium; |
| Notes: | "PubMed-not-MEDLINELu, Yuheng Li, Chenghui Tian, Yunfei Hu, Jing Hou, Xiandeng eng Netherlands 2023/02/14 Anal Chim Acta. 2023 Mar 22; 1247:340859. doi: 10.1016/j.aca.2023.340859. Epub 2023 Jan 18" |
