The high mass transport caused by ultrasonic radiation in the preconcentration of trace metal species in anodic stripping voltammetry (ASV), leads to an order of magnitude enhancement in sensitivity. A Nafion-coated mercury thin-film working electrode is placed in a specially designed small-volume sonovoltammetric cell. The preparation and curing procedure for the Nafion film on a glassy carbon...

Herein, we report a simple and inexpensive way for the fabrication of an ultramicroelectrode and present its characterization by electrochemical techniques. The fabrication of polyaniline UME involves only two steps: modification of a gold (Au) electrode by self assembled monolayers (SAM) and then electrodeposition of polyaniline film on this thiol-coated Au electrode by using cyclic voltammetr...

In this paper, we report the design, fabrication and characterization of an in-silico cell physiology biochip for measuring Ca ion concentrations and currents around single cells. This device has been designed around specific science objectives of measuring real time multidimensional calcium flux patterns around sixteen Ceratopteris richardii fern spores in microgravity flight experiments and g...

Single wire experiments were performed on a low current pulse generator at Cornell University. A 220 nF capacitor charged to 15–25 kV was used to drive single wire experiments. The capacitor and wire holder were connected in series through an external variable inductor to control the current rise rate. This external series inductance was adjustable from 0.2 to 2 mH. When coupled with the range ...

Liquid pumping can occur along the outer surface of an electrode under a DC electric field. For biological applications, a better understanding of the ionic solution pumping mechanism is required. Here, we fabricated CNT wire electrodes (CWEs) and tungsten wire electrodes (TWEs) of various diameters to assess an ionic solution pumping. A DC electric field created by a bias of several volts pump...

The respirometer is shown in Fig. 1. The cathode was made from gold wire of 0.51 mm diam which was coated with glass of low melting point (4). After mounting the cathode as shown in Fig. 1, the gold and its glass coating were ground to a flat surface and polished using a series of carborundum grinding powders. The cathode was maintained at -0.45 V with respect to the calomel electrode. The elec...

Granisetron content of some pharmaceutical tablets was determined using a novel all-solid-state polymeric-membrane-electrode (ASS-PME) having a sensing element functioning based on an ion-exchange mechanism. The best results were observed with ASSPMEs containing 8% GST-tetrakis (p-chlorophenyl) borate as the ion-pair, 56% of dibutyl phthalate, 31% of poly(vinyl chloride), 3% of an ionic liquid ...