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

A series of lanthanide coordination polymers, i.e., [Ln.sup.III.sub.4(oba).sub.6(H.sub.2O).sub.9]·3H.sub.2O, where Ln.sup.III corresponded to Eu.sup.III (I), Gd.sup.III (II), Tb.sup.III (III), H.sub.2oba-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.
Author(s): Thammanoon Chuasaard [sup.1] , Pimchanok Tapangpan [sup.1] , Athipong Ngamjarurojana [sup.2] , Kate Grudpan [sup.1] , Apinpus Rujiwatra [sup.1] [sup.3] Author Affiliations: (1) https://ror.org/05m2fqn25, grid.7132.7, 0000 0000 9039 7662, [...]