Iodine is a common impurity in tetrabutylammonium fluoride

SENSORS AND ACTUATORS B-CHEMICAL

卷:258

Article

Brettell-Adams, Ian A.¹  Andreen, Alexandra V.¹  Bhattacharyya, Sidhartha²  Rupar, Paul A.¹ 

[1] Univ Alabama, Dept Chem, Box 870336, Tuscaloosa, AL 35487 USA

[2] Univ Alabama, Dept Geol Sci, Tuscaloosa, AL 35487 USA

关键词: Tetrabutylammonium fluoride;    Fluoride sensors;    Standard impurities;    Iodine impurities;    Boron sensing;   

DOI  :  10.1016/j.snb.2017.11.091

来源: Elsevier

【 摘 要 】

Tetrabutylammonium fluoride (TBAF) is a common fluoride source used for the development of fluoride sensors. Commercial TBAF samples were found to absorb light at 295 and 370 nm and fluoresce at 435 nm, which is not expected for pure TBAF. The source of the anomalous absorption and emission was determined to be I-3(-). The I-3(-) forms from the oxidation of I-, which was detected as an impurity in all commercially purchased TBAF samples (6 tested total). The concentrations of iodine in commercial samples of TBAF were found to range from 0.0186% to 0.866% w/w,(1) as measured by ICP-MS.(2) The presence of iodine in TBAF can impact sensing results when TBAF is used as a fluoride source for sensing experiments. (c) 2017 Elsevier B.V. All rights reserved.

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