A novel prepared mercuric ion PVC membrane sensor based on a Rhodamine B derivative (RND) as a selective sensing material was described. The sensor exhibited a specific fluorescent off-on response to Hg(2+), and showed a linear response over the Hg(2+) concentration range from 1.0 × 10(-9) to 2.0 × 10(-3)M with a very low detection limit of 8.1 × 10(-10)M in bulk method. The sensor has also bee...

Abstract. We report on a pilot study using CO2 optode deployed Seaglider in the Norwegian Sea from March to October 2014. The measurements required drift and lag correction situ calibration discrete water samples collected vicinity. found that signal correlated better with concentration of CO2, c(CO2), than its partial pressure, p(CO2). Using calibrated c(CO2) regional parameterisation total al...

Diffuse optical tomography (DOT) can image spatial variations in highly scattering optical media. We have built an inexpensive and portable continuous-wave DOT system containing 18 laser diode sources (9 at 780nm and 9 at 830nm) and 16 silicon detectors, which can acquire 288 independent measurements in less than 4 seconds. These data can then be processed using a variety of imaging algorithms....

A spectrophotometric flow-injection analysis (FIA) system for monitoring clinical hemodialysis is demonstrated. The role of a dialysate urea detector incorporated in this bioanalytical system is played by an optical flow-through biosensor based on Prussian Blue film with chemically linked urease forming a monomolecular layer of the enzyme. This pH-enzyme optode-FIA system is useful for the sele...

The present study describes and validates a novel yet simple system for simultaneous in vivo measurements of rates of aquatic CO2 production (ṀCO2 ) and oxygen consumption (ṀO2 ), thus allowing the calculation of respiratory exchange ratios (RER). Diffusion of CO2 from the aquatic phase into a gas phase, across a hollow fibre membrane, enabled aquatic ṀCO2  measurements with a high-precision in...

This work aims to develop an efficient sensing device detect milk freshness when stored at typical home conditions. The synthesis of the pH-sensitive optode array, experimental setup for monitoring, and array images acquisition procedure are presented. employment various chemometric tools on RGB triplets visualize, compare, predict spoilage commercial types is discussed. conclusions drawn from ...