Detection of Monosodium Glutamate by Lanthanide-oxybis(benzoate) Coordination Polymers

• Published in: Journal of analytical chemistry (New York, N.Y.) N.Y.), 2023-10, Vol.78 (10), p.1389-1397
• Main Authors: Chuasaard, Thammanoon, Tapangpan, Pimchanok, Ngamjarurojana, Athipong, Grudpan, Kate, Rujiwatra, Apinpus
• Format: Article
• Language: English
• Subjects: Amino acids; Analytical Chemistry; Benzoates; Benzoic acid; Calibration; Chemical properties; Chemistry; Chemistry and Materials Science; Coordination polymers; Measurement; Monosodium glutamate; Photoluminescence; Polymers; Sodium glutamate
• ISSN: 1061-9348; 1608-3199
• DOI: 10.1134/S1061934823100064

A series of lanthanide coordination polymers, i.e., [Ln III 4 (oba) 6 (H 2 O) 9 ]·3H 2 O, where Ln III corresponded to Eu III ( I ), Gd III ( II ), Tb III ( III ), H 2 oba—4,4'-oxybis(benzoic acid), were synthesized using the rapid and facile microwave technique. They were structurally characterized and evaluated for use as photoluminescent probes in monosodium glutamate ( MSG ) detection. Possible interferences of amino acids were examined. Based on the devised ratiometric parameters, I showed viable responses to MSG. Linear calibration plot could be constructed over 10–100 mM with sensitivity, limits of detection and quantification of 33.2% mM, 1.3, and 4 mM, respectively. The constructed calibration plot could be used to determine concentrations of standard MSG solutions providing the percentage recoveries of 94–103%. The use of I for real soup samples was also attempted through the standard spiking approach.