Facile Dual Enhanced Modes of Nanoparticles/Sodium Dodecyl Sulfate for Luminescent Detection of Vitamin C in Commercial
- PDF / 1,077,083 Bytes
- 10 Pages / 612 x 792 pts (letter) Page_size
- 1 Downloads / 181 Views
RTICLES
Facile Dual Enhanced Modes of Nanoparticles/Sodium Dodecyl Sulfate for Luminescent Detection of Vitamin C in Commercial Fruit Juices Wedad A. Al-onazia, Nawal A. Alarfaja, Maha F. El-Tohamyb, *, and Nada A. Al-Malkia aDepartment
of Chemistry, College of Science, King Saud University, P.O. Box 22452, Riyadh, 11495 Saudi Arabia Administrative of Medical Affairs, Zagazig University, Zagazig, Ash Sharqiyah, Egypt *e-mail: [email protected]
bGeneral
Received March 27, 2018; revised April 30, 2018; accepted March 21, 2020
Abstract—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 λem of 420 nm after λex 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. Keywords: ascorbic acid, spectrofluorimetry, silver nanoparticles, gold nanoparticles, copper oxide nanoparticles, commercial fruit juices DOI: 10.1134/S1061934820100020
Ascorbic acid (AA) is a cofactor that is required to maintain fundamental processes throughout the body (Scheme 1) [1]. It plays an important role in basic nervous system functions as well as in cell communication [2]. AA cannot be formed normally in a human body therefore, it is essential to be taken in the human diet. It is a part of various physiological functions in living organisms such as collagen synthesis in the connective body tissues, antioxidant, anti-inflammatory agent and protects body cells from damage [3]. HO O
O
HO HO
OH
Scheme 1. Chemical structure of ascorbic acid.
Clark and Frank [4] suggested a simple HPLC approach with electrochemical detection for AA determination in plasma using a single column and automatic alternating dual column regeneration. Reversed-phase HPLC methods for simultaneous detection of AA in the presence of other compounds such as gallic acid and caffeine were also reported [5, 6]. Szultka et al. [7] proposed another method for detecting the degradation products of vitamin C by
liquid chromatography−mass spectrometry (LC− MS). The detection was performed using a UV detector in sequence with a triple-quadrupole mass spectrometer (MS) in the multiple reaction monitoring mode. Moreover, AA was determined using silica gel thin layer chromatography [8]. Another group of researchers suggested a simple high performance thin layer chromatography-densitometry metho
Data Loading...
