Direct visual detection and quantification of mercury in fresh fish meat using facilely prepared polymeric sensory labels

Abstract

Direct visual detection and quantification of mercury in fish and water using easily prepared polymeric labels. In fish, the labels can be used directly through contact with fish meal.

Why Is the Sensory Response of Organic Probes within a Polymer Film Different in Solution and in the Solid-State? Evidence and Application to the Detection of Amino Acids in Human Chronic Wounds

“…It is usually found in the bibliography that solid polymers having sensory motifs chemically anchored to the polymer backbone behave in a different way than the sensory chemicals in solution beyond the lack of migration of the sensory motifs to the solution. It is stated that these systems mimic enzymes in water solutions that have a broad hydrophilic body that maintains the protein hydrated (tertiary structure) and small hydrophobic active sites where selective reactions take place without the competition of water [ 2 , 3 , 5 , 29 ]. Herewith we demonstrate the influence of the polymer matrix in outperforming the performance of conventional probes by two means: analysing the interaction of the probe or sensory motifs in solution and chemically anchored to a polymer in the solid-state and analysing the influence of the diffusion of species in solution into the swelled film.…”

“…Photographs were taken three-fold for the error’s calculations, and the average of each RGB parameter was calculated. This easy and cheap method allows the quantification of amino acid in aqueous media, by only taking a photo, and we have widely used it in previous works [ 3 , 7 ].…”

Microcellular polymer films based on cross-linked 1-vinyl-2-pyrrolidone and methyl methacrylate

“…The obtained data show that values of WSP vary between 19 % and 42 %, with a clear influence of the presence of the cross-linker (reported WSP values in similar non-cross-linked films are around 60 %[22], which indicates that the cross-linker reduces greatly the WSP). It can be seen that adding short chain length PEGDMA, (film 2f, with PEGDMA 200 ), decreases the WSP respect to film 1f (without cross-linker) from 42 % to 19 %.…”

Polymeric chemosensor for the detection and quantification of chloride in human sweat. Application to the diagnosis of cystic fibrosis

“…[14][15] Fluorescence is a most appropriate readout for measuring and detecting this anion and very recently variations of the fluorescence of molecular sensors have been used to quantify chloride within this context. [16][17][18] However, these systems require the collection of sweat from the patient and manipulation of the sample with the addition reagents such as concentrated acids in order to complete the analysis.…”