JOURNAL ARTICLE

Quantitative analysis of sodium concentration in condiments, soft drinks, and mineral water by external standard 23Na-qNMR.

  • Published In: Bioscience, Biotechnology & Biochemistry, 2025, v. 89, n. 1. P. 88 1 of 3

  • Database: Academic Search Ultimate 2 of 3

  • Authored By: Ogura, Kenji 3 of 3

Abstract

This article focuses on the application of external standard quantitative sodium-23 nuclear magnetic resonance spectroscopy (23Na-qNMR) for accurately measuring sodium concentrations in liquid foods, including condiments, soft drinks, and mineral water. The study demonstrates that 23Na-qNMR can reliably quantify sodium over a wide concentration range (0.4 to 800 mg/100 mL) without the need for deuterated solvents or complex sample pretreatment, aside from dilution for high-sodium condiments like soy sauce. Results from 23Na-qNMR showed strong agreement with ion electrode measurements and manufacturer-reported sodium content, highlighting its potential as a cost-effective and versatile method for sodium analysis in food products. Proper calibration of the 90° pulse width and consistent measurement conditions were identified as critical factors for accurate quantification.

Additional Information

  • Source:Bioscience, Biotechnology & Biochemistry. 2025/01, Vol. 89, Issue 1, p88
  • Document Type:Article
  • Subject Area:Nutrition and Dietetics
  • Publication Date:2025
  • ISSN:0916-8451
  • DOI:10.1093/bbb/zbae150
  • Accession Number:181970549
  • Copyright Statement:Copyright of Bioscience, Biotechnology & Biochemistry is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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