Micromolar fluoride contamination arising from glass NMR tubes and a simple solution for biomolecular applications

Micromolar fluoride contamination arising from glass NMR tubes and a simple solution for biomolecular applications
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玻璃核磁共振管产生的微摩尔氟化物污染以及生物分子应用的简单解决方案

DOI:
10.1101/2024.02.12.579991
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发表时间:
2024
期刊:
--
影响因子:
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通讯作者:
Matwani K
Matwani K
中科院分区:
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文献类型:
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作者:
Matwani K

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氟(19F)核磁共振正在成为化学、生物化学、结构生物学、材料科学、药物发现和医学中宝贵的分析技术,特别是由于天然存在的氟在生物、有机和无机化合物中固有的稀缺性。在这里,我们重温从新的和未使用的玻璃核磁共振管氟化物浸出不足报道的问题。我们描述了在几个小时内从各种新型和未使用的玻璃核磁共振管中浸出游离氟化物的特征,并将这种污染物量化为微摩尔浓度,适用于多种玻璃类型和品牌的典型核磁共振样品量。我们发现,在我们实验的时间框架内,石英核磁共振管中制备的样品无法检测到这种人工制品。我们还观察到,预浸泡新的玻璃核磁共振管结合冲洗去除这种污染低于微摩尔水平。鉴于19f核磁共振在广泛领域的日益普及,一次性筛选管的日益普及,弛豫研究和低浓度样品所需的长收集时间,以及在所有核磁共振实验中避免污染的重要性,我们预计我们的简单解决方案将对生物分子核磁共振波谱学家有用。
Fluorine (19F) NMR is emerging as an invaluable analytical technique in chemistry, biochemistry, structural biology, material science, drug discovery, and medicine, especially due to the inherent rarity of naturally occurring fluorine in biological, organic, and inorganic compounds. Here, we revisit the under-reported problem of fluoride leaching from new and unused glass NMR tubes. We characterised the leaching of free fluoride from various types of new and unused glass NMR tubes over the course of several hours and quantify this contaminant to be at micromolar concentrations for typical NMR sample volumes across multiple glass types and brands. We find that this artefact is undetectable for samples prepared in quartz NMR tubes within the timeframes of our experiments. We also observed that pre-soaking new glass NMR tubes combined with rinsing removes this contamination below micromolar levels. Given the increasing popularity of19F NMR across a wide range of fields, increasing popularity of single-use screening tubes, the long collection times required for relaxation studies and samples of low concentrations, and the importance of avoiding contamination in all NMR experiments, we anticipate that our simple solution will be useful to biomolecular NMR spectroscopists.
DOI: 10.1021/acs.joc.8b00104
发表时间: 2018-03-16
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影响因子: --
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DOI: --
发表时间: 1986
期刊: Biochemistry
影响因子: 2.9
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发表时间: 2019-09-01
影响因子: 2.7
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