2019
DOI: 10.1021/acs.analchem.8b05893
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Reduction of Interferences Using Fe-Containing Metal–Organic Frameworks for Matrix Separation and Enhanced Photochemical Vapor Generation of Trace Bismuth

Abstract: Photochemical vapor generation (PVG) has emerged as a promising sample introduction method for atomic spectrometry in recent years. Despite its great success, a major impediment for the wide application of PVG is the interferences from the coexisting ions, especially transition-metal ions. In this work, iron and 1,3,5-benzenetricarboxylic (Fe-BTC), a Fe-containing metal–organic framework (MOF) material, was synthesized and first used as a platform integrating the sample matrix separation, preconcentration, and… Show more

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Cited by 42 publications
(17 citation statements)
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“…The results suggest that the major products formed from irradiation of As, Mo, and Sb are (CH 3 ) 3 As, and Mo(CO) 6 and (CH 3 ) 3 Sb Figure 5, respectively. 28,32,34,41,42 No new volatile species of As, Sb, and Mo were detected in the system with the gas−liquid interface but the generated volatile species in the system with gas−liquid interface are more than that obtained in bulk solution. It implies that similar photochemical processes may happen, but the gas−liquid interface(s) may facilitate the photochemical reduction of analytes.…”
Section: ■ Results and Discussionmentioning
confidence: 97%
“…The results suggest that the major products formed from irradiation of As, Mo, and Sb are (CH 3 ) 3 As, and Mo(CO) 6 and (CH 3 ) 3 Sb Figure 5, respectively. 28,32,34,41,42 No new volatile species of As, Sb, and Mo were detected in the system with the gas−liquid interface but the generated volatile species in the system with gas−liquid interface are more than that obtained in bulk solution. It implies that similar photochemical processes may happen, but the gas−liquid interface(s) may facilitate the photochemical reduction of analytes.…”
Section: ■ Results and Discussionmentioning
confidence: 97%
“…Generation strategies usually focus on composition of the photochemical medium and/or on the addition of various photocatalysts (such as TiO 2 or similar nanomaterials) or metal sensitizers to the sample to optimize efficiency. The following metal sensitizers have so far been utilized with significant enhancement effects on PVG of several elements and include Cd 2+ and Fe 3+ on PVG of As; , Cd 2+ on Se 6+ ; Co 2+ and Ni 2+ on Pb; Cu 2+ on Cl; Cu 2+ on Ir and Rh; Fe 2+ on Te; Fe 3+ and a mixture of Co 2+ and Cu 2+ on Mo; , Fe 3+ on Bi; , and very recently Co 2+ on Tl . Apart from the evident change in the UV–vis absorption spectrum of the reaction medium, the mechanism of their action remains rather speculative. ,, …”
mentioning
confidence: 99%
“…It is self-evident that knowledge of the analytical reaction products is fundamentally crucial to furthering our understanding and validation of possible PVG mechanisms. Many systems have been successfully characterized using gas chromatography mass-spectrometry (GC-MS) techniques, including As, 9,10 Bi, 11–13 Br, 14,15 Cl, 15,16 Co, 13,17 I, 18 F, 19 Fe, 20,21 Hg, 22 Mo, 10 Ni, 23 Sb, 10 Se 24 and Te. 25…”
Section: Introductionmentioning
confidence: 99%