Microchimica Acta
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Development and application of the cold-vapour techniques for the determination of mercury in biological materials — A review
Microchimica Acta - Tập 65 - Trang 307-320 - 1976
The development of the cold-vapour technique for the determination of mercury is reviewed, from the early methods by which mercury in a sample was converted into a vapour for absorption measurements, to the recent developments utilizing reduction of mercury to the elemental state with tin(II) chloride and its measurement with an atomic-absorption spectrophotometer. Application of the technique to ......
Fluorescent assay of alkaline phosphatase activity via atom transfer radical polymerization
Microchimica Acta - Tập 189 - Trang 1-8 - 2022
A novel fluorescence assay is proposed through activators regenerated by electron transfer atom transfer radical polymerization (ARGET ATRP) strategy for alkaline phosphatase (ALP) activity detection. First of all, 2-bromo-2-methylpropionic acid (BMP) was employed as the initiator to modify on the surface of the magnetic nanoparticle (Fe3O4-MNP) by amide bonding. Then, ascorbic acid (AA) produced ......
Chemiluminescence assay for detection of 2-hydroxyfluorene using the G-quadruplex DNAzyme-H2O2-luminol system
Microchimica Acta - Tập 185 - Trang 1-7 - 2017
A chemiluminescence (CL) based assay is described for the determination of the environmental pollutant 2-hydroxyfluorene (2-HOFlu) which is found to inhibit the CL of a system composed of the G-quadruplex/hemin complex (a DNAzyme), H2O2, and luminol. The G-rich aptamer PW17 is transformed to a potassium(I)-stabilized G-quadruplex-hemin complex which displays peroxidase-like activity to catalyze th......
Bioenzyme-free colorimetric assay for creatinine determination based on Mn3O4 nanoparticles catalyzed oxidation of 3,3′,5,5′-tetramethylbenzidine
Microchimica Acta - Tập 191 - Trang 1-11 - 2023
Mn3O4 nanozyme with good oxidase-like activity was successfully synthesized. The prepared Mn3O4 nanozyme can directly and effectively catalyze the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) to generate green–blue-colored ox-TMB. Creatinine exhibits distinct inhibition effect on Mn3O4 nanozyme-catalyzed TMB colorimetric reaction system, leading to obvious color fading and absorbance intensit......
Sulfur-doped carbon quantum dots and derived 3D carbon nanoflowers are effective visible to near infrared fluorescent probes for hydrogen peroxide
Microchimica Acta - Tập 184 - Trang 2055-2062 - 2017
Near-infrared photoluminescence is intrinsic only to a minority of carbonaceous nanomaterials. Longwave fluorescence is, however, well suited for bio-sensing and bio-imaging owing to the low autofluorescence and low absorbance by biomatter. The authors describe here sulfur doped carbon quantum dots (S-CQDs) and their derivatives (referred to as 3D carbon nanoflowers; S-CNFs). Their average diamete......
Detection of chlorantraniliprole residues in tomato using field-deployable MIP photonic sensors
Microchimica Acta - Tập 188 - Trang 1-7 - 2021
A photonic sensor based on inversed opal molecular imprinted polymer (MIP) film to detect the presence of chlorantraniliprole (CHL) residue in tomatoes was developed. Acrylic acid was polymerized in the presence of CHL inside the structure of a colloidal crystal, followed by etching of the colloids and CHL elution. Colloidal crystals and MIP films were characterized by scanning electron microscopy......
Microdetemination of nitro and nitroso groups in aliphatic and aromatic compounds, especially in nitro-arginines
Microchimica Acta - - 1980
A novel microanalytical method is described for the quantitative determination of nitro and nitroso groups in aliphatic, aromatic and nitro-arginine compounds. During decomposition by pyrolysis in a stream of oxygen, nitrogen oxides and decomposition products containing nitrogen were formed from the nitro and nitroso groups of the substances studied. These were transformed into nitrogen dioxide by......
Au nanoparticle plasmon-enhanced electrochemiluminescence aptasensor based on the 1D/2D PTCA/CoP for diclofenac assay
Microchimica Acta - - 2021
The combination of localized surface plasmon resonance (LSPR) and electrochemiluminescence (ECL) can be an effective way to amplify the signal intensity. In this work, an ECL aptasensor with 3,4,9,10-perylenetetracarboxylic acid–decorated cobalt phosphate (denoted as PTCA/CoP) as the ECL emitter and Au nanoparticles (NPs) as plasma was proposed for diclofenac assay. The prepared PTCA/CoP with spec......
Two-layer reflectometric interference spectroscopy-based immunosensing for C-reactive protein
Microchimica Acta - Tập 182 - Trang 307-313 - 2014
We report on dual interference layers for use in reflectometric interference spectroscopy (RIfS)-based immunosensing. The layers consist of (a) an antibody-embedded organic/inorganic hybrid titanium dioxide (TiO2) layer (~60 nm thick) as a sensitive layer, and (b) a TiO2 layer (~110 nm thick) as an interference base layer placed on a silicone substrate by liquid phase deposition. A monoclonal anti......
Aptamer based test stripe for ultrasensitive detection of mercury(II) using a phenylene-ethynylene reagent on nanoporous silver as a chemiluminescence reagent
Microchimica Acta - Tập 181 - Trang 663-670 - 2014
We describe a paper-based chemiluminescence (CL) test for the determination of mercury(II) ion. A single-stranded DNA aptamer was first covalently immobilized via its amino groups to the hydroxy groups on the surface of cellulosic paper. The aptamer probes can capture Hg(II) ions due to their specific interaction with thymine. The CL reagent (a caboxylated phenylene-ethynylene referred to as P-aci......
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