https://www.selleckchem.com/products/sb239063.html The method exhibited a good linear relationship, with the qualified coefficient of determination (R = 0.9994) in the wide range of 1 to 1000 μg L . The accuracy was validated based on spiked recovery at three spiking levels (12.5, 25.0, and 50.0 μg kg , TM/matrix) in blank matrices that included chicken sausages, beef balls, and egg-milk biscuits. The recoveries ranged from 91% to 109% with qualified relative standard deviations <15% with the limit of quantification (of 1.6 mg kg , TM/matrix). This new approach can be used for the qualitative and quantitative detection of crustacean TM in various food matrices. © 2021 Society of Chemical Industry. This new approach can be used for the qualitative and quantitative detection of crustacean TM in various food matrices. © 2021 Society of Chemical Industry.The impact of metal-to-ligand charge transfer towards the redox noninnocence of 2,2'-azobis(benzothiazole) (abbt) has been highlighted on coordination to RuII (acac)2 (acac=2,4-pentanedionato). It led to the authentication of a series of mononuclear and dinuclear complexes incorporating variable oxidation states of abbt (abbt0/.-/2- ). Mononuclear 1 was identified as [RuIII (abbt.- )], a MLCT excited state of [RuII (abbt)]. Dinuclear 2 was however recognized as two discrete redox isomers (i) radical bridged mixed-valent meso-[Ru2.5 (μ-abbt.- )Ru2.5 ] (2a) and (ii) dianionic ligand bridged isovalent meso-[RuIII (μ-abbt2- )RuIII ] (2b), demonstrating unprecedented structural confirmation of valence tautomerism in azo-based ligand systems. A crystal structure of [2]ClO4 validated the formation of [RuIII (μ-abbt.- ) RuIII ]ClO4 . Analysis of electronic structural forms of 1 and 2 in accessible redox states via spectroelectrochemistry and DFT revealed their electron reservoir feature. Long-term use of the immunosuppressant tacrolimus is limited by nephrotoxicity. Following renal transplantation, the risk of nephrotoxicity ma