We compare results for iodine quantitation by x-ray fluorescence of excised thyroid glands with results of the quantitation by means of an original, newly developed chemical method, a Schöniger combustion technique, in which iodie is quantitated potentiometrically. Subsequently, we establish the accuracy and clinical suitability of the former technique in quantifying the intrathyroidal iodine.

Charge transport in 20–30-Å-thick Bi films is studied by scanning tunneling potentiometry at room temperature. Deposition at T5140 K onto InP-based multilayer substrates leads to flat and continuous films that are subjected to a lateral current density of up to 8310 A/cm. We find that scattering at surface defects and grain boundaries gives rise to discontinuities in the local electrochemical p...

The use of enzymes in analytical chemistry has gained tremendous attention during the last 2-3 decades. The obvious and straightforward reason has to do with the specificity of enzymatic reactions. In other words, by incorporating an enzyme-related step in the analytical cycle, someone can achieve high selectivity by using non-selective detection techniques (e.g. spectrophotometry, fluorescence...

We report a method for detecting microRNAs encapsulated in exosomes using a microelectrode array in semiconductor-based potentiometry after RT-PCR. The inherent miniaturization of the electrical biosensor meets requirements for massively parallel analysis of circulating microRNA as a noninvasive biomarker.

In recent years, there has been an increase in public perception of the detrimental side-effects fluoride to human health due its effects on teeth and bones. Today, is a plethora techniques available for removal from drinking water. Among them, adsorption very prospective method because handy operation, cost efficiency, high selectivity. Along with efforts assist waters, extensive attention als...