| Title: | Bimetallic-based food sensors for meat spoilage: Effects of the accepting metallic unit in Fe(II)CNM(A) (M(A)?ª+=?ª+Pt(II) or Au(I)) on device selectivity and sensitivity |
| Address: | "Department of Science and Environmental Studies, The Education University of Hong Kong, 10 Lo Ping Road, Tai Po, Hong Kong Special Administrative Region. Electronic address: cfchow@eduhk.hk" |
| DOI: | 10.1016/j.foodchem.2019.125190 |
| ISSN/ISBN: | 1873-7072 (Electronic) 0308-8146 (Linking) |
| Abstract: | "Technologies for monitoring meat spoilage are important to ensuring consumer safety. As dimethyl sulfide (DMS) is a reliable marker for meat freshness, sensitive and selective DMS sensors are of great interest. Herein, two trinuclear cyano-bridged bimetallic donor-acceptor ensembles, Fe(II)(bpy)(2)(CN)(2)-[Pt(II)(DMSO)Cl(2)](2) (1) and Fe(II)(bpy)(2)(CN)(2)-[Au(I)Cl](2), were synthesized, and corresponding solid-supported sensors were fabricated to determine the effect of the acceptor metal (M(A)) on DMS detection. Changing M(A) from Au(I) to Pt(II) improved the sensitivity and selectivity owing to changes in the relative thermodynamic stabilities of the complex and M(A)-DMS adduct. When applied to real meat samples, 1 exhibited a linear spectroscopic response to DMS, even in the presence of interfering compounds, with a method detection limit of 1.0?ª+ppm. The total bacteria count and gas chromatography-mass spectrometry results revealed that the spectroscopic signal generated by 1 correlated with the microbial growth level and DMS concentration during meat spoilage" |
| Keywords: | Coordination Complexes/chemical synthesis/*chemistry Food Analysis/instrumentation/*methods Food Microbiology Gold/chemistry Limit of Detection Meat/*analysis/microbiology Platinum/chemistry Sensitivity and Specificity Sulfides/*analysis Volatile Organic; |
| Notes: | "MedlineChow, Cheuk-Fai eng England 2019/07/23 Food Chem. 2019 Dec 1; 300:125190. doi: 10.1016/j.foodchem.2019.125190. Epub 2019 Jul 16" |
