Facile Dual Enhanced Modes of Nanoparticles/Sodium Dodecyl Sulfate for Luminescent Detection of Vitamin C in Commercial Fruit Juices

• Published in: Journal of analytical chemistry (New York, N.Y.) N.Y.), 2020-10, Vol.75 (10), p.1285-1294
• Main Authors: Wedad A. Al-onazi, Alarfaj, Nawal A., El-Tohamy, Maha F., Al-Malki, Nada A.
• Format: Article
• Language: English
• Subjects: Analytical Chemistry; Ascorbic acid; Chemistry; Chemistry and Materials Science; Copper oxides; Fluorescence; Fruit juices; Gold; Juices; Linearity; Nanoparticles; Silver; Sodium dodecyl sulfate; Sulfates; Surface active agents; Vitamin C
• ISSN: 1061-9348; 1608-3199
• DOI: 10.1134/S1061934820100020

The present study suggested three different highly sensitive luminescent systems based on the employment of silver nanoparticles ( NPs ), copper oxide nanoparticles and gold nanoparticles in the presence of micellar medium sodium dodecyl sulfate ( SDS ) for the detection of ascorbic acid in some fruit juices. The fluorescence spectral behavior of ascorbic acid was detected at λ em of 420 nm after λ ex at 350 nm in the presence of acetate buffer (pH 3). Under optimized experimental conditions, the suggested spectroflourimetric systems displayed excellent linearity over concentration ranges of 1.0 × 10 –9 –1.0 × 10 –2 , 1.0 × 10 –7 –1.0 × 10 –3 and 1.0 × 10 –6 –1.0 × 10 –3 M with lower limits of detection of 1.0 × 10 –10 , 5 × 10 –8 and 5 × 10 –7 M for SDS−AgNPs, SDS−CuONPs and SDS−AuNPs systems, respectively. The suggested approaches were successfully used to detect ascorbic acid in its bulk powder and in some commercial fruit juices.