Pushing the frontiers: boron-11 NMR as a method for quantitative boron analysis and its application to determine boric acid in commercial biocides

Quantitative boron-11 NMR (11B qNMR) spectroscopy has been introduced for the first time as a method to determine boric acid content in commercial biocides. Validation of the method affords a limit of detection of 0.02% w/w and a limit of quantification of 0.04% w/w, which are low enough to determin...

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Veröffentlicht in:	Analyst (London) 2018-10, Vol.143 (19), p.4707-4714
Hauptverfasser:	Aguilera-Sáez, Luis Manuel, Belmonte-Sánchez, José Raúl, Romero-González, Roberto, Martínez Vidal, José Luis, Arrebola, Francisco Javier, Garrido Frenich, Antonia, Fernández, Ignacio
Format:	Artikel
Sprache:	eng
Schlagworte:	Acids Biocides Boron Inductively coupled plasma mass spectrometry Linearity Mass spectrometry NMR Nuclear magnetic resonance Preservatives
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Zusammenfassung:	Quantitative boron-11 NMR (11B qNMR) spectroscopy has been introduced for the first time as a method to determine boric acid content in commercial biocides. Validation of the method affords a limit of detection of 0.02% w/w and a limit of quantification of 0.04% w/w, which are low enough to determine boric acid in commercial biocides. Other figures of merit such as linearity (R2 > 0.99), recovery (93.6%-106.2%), intra- and inter-day precision (from 0.7 to 2.0%), uncertainty (3.7 to 4.4%) and matrix effects were also evaluated. This method was successfully applied to determine boric acid in five different commercial biocides in a wide range of concentrations (
ISSN:	0003-2654 1364-5528
DOI:	10.1039/c8an00505b