Voltammetry anodic stripping square wave

Square-wave anodic stripping voltammetry was employed by Komorsky-Lovric [107] for the determination of bismuth in seawater. A bare glassy-carbon rotating disk electrode was preconditioned at -0.8 V versus Ag/AgCl, prior to concentration of bismuth. The method was applied to seawater in the 12 ng/1 range. [Pg.144]

The analytical use of GECE modified in situ by using bismuth solution for square wave anodic stripping voltammetry (SWASV) of heavy metals is also studied [36]. The use of this novel format is a simpler alternative to the use of mercury for analysis of trace levels of heavy metals. The applicability of these new surface-modified GECE to real samples (tap water and soil samples) is presented. [Pg.152]

A common approach used in a number of investigations is to modify the SPCE with a thin film of Hg. Recently, Palchetti et al. [152] have reported on the use of an SPCE modified with a thin film of Hg and cellulose (Methocel) for the determination of Pb2+, Cd2+ and Cu2+, using square-wave anodic stripping voltammetry. Detection limits of 0.3, 1 and 0.5 pgl-1 were obtained for Pb2+, Cd2+ and Cu2+, respectively deoxygenation of sample solution was found unnecessary. In all cases, linearity ranging from lpgl 1 to lmgl-1 and correlations of 0.9998 for Cd and Pb, and 0.9987 for Cu were obtained. [Pg.524]

MCPE = magnet carbon paste electrode, SWASV = square wave anodic stripping voltammetry, ASV = anodic stripping voltammetry, PSA = potentiometric stripping analysis, SPEs = screen-printed electrodes, TFGE = thick-film graphite electrode, GCE = glassy carbon electrode. [Pg.952]

Figure 8.3 Schematic representation of copper concentrations relevant to freshwater studies and analytical windows of several analytical techniques. ASV, anodic stripping voltammetry CSV, cathodic stripping voltammetry ISE, ion selective electrode SLM, supported liquid membrane SWASV, square wave anodic stripping voltammetry LC50, lethal concentration for 50% of the population [Cu]t, total metal concentration (adapted from Langford and Gutzman, 1992).

Martinotti, W., Queirazza, G., Guarinoni, A. and Mori, G. (1995) In-flow speciation of copper, zinc, lead and cadmium in fresh waters by square wave anodic stripping voltammetry Part II. Optimization of measurement step. Anal. Chim. Acta, 305, 183-191. [Pg.228]

Feldman BJ, Oserioh JD, Hata BH, D Alessandro A. Determination of lead in blood by square wave anodic stripping voltammetry at a carbon disk ultramicroelectrode. Anal Chem 1994 66 1983-7. [Pg.117]

The aim of this work is to demonstrate how the screen printed electrodes (SPEs) can be used for on site heavy metals monitoring in surface waters in the frame of the WFD. The sensors used consist of mercury-coated screen-printed electrodes coupled with square wave anodic stripping voltammetry (SWASV) (Palchetti et al., 1999). Three metals Cu, Cd, and Pb which are classically analysed in water matrices have been considered. Moreover, Cd and Pb belong to the priority substances list of the WFD. Performance criteria of the device are first established to evaluate the level of confidence of the method. The potential use of the device and its main advantages are then highlighted through two illustrative field applications. [Pg.264]

It is used in combination with square wave anodic stripping voltammetry (SWASV) using a PalmSens portable instrument (Palm Instrument BV, Houten, The Netherlands) for the measurement of metals such as Cu (II), Cd (II) and Pb (II) (labile metallic complexes and free metals) in water. These disposable sensors require no calibration for use in the screening mode, so, many samples may be tested for the presence or the absence of metals in water. The quantification can also be performed using the standard addition method in less than 15 min. [Pg.265]

SWASV Square wave anodic stripping voltammetry... [Pg.587]

Petrovic SC, King DF, and Dewald HD (1998) Electrochemical detection in thin-layer chromatography (TEC). A review on application of direct on-plate square-wave anodic stripping voltammetry for TEC. Electroanalysis 6 393-398. [Pg.4949]

Daniele, S., Baldo, M.A., Ugo, P. and Mazzocchin, G.A. (1990) Voltammetric probe of milk samples by using a platinum microelectrode. Analytica Chimica Acta, 238, 357-366. Wojciechowski, M. and Balcerzak, J. (1991) Square-wave anodic-stripping voltammetry of lead and cadmium at cylindrical graphite fiber microelectrodes with in-situ plated mercury films. Analytica Chimica Acta, 249, 433-445. [Pg.237]

Table 11. Instrumental parameters for the determination of Hg(II), Cu(II) at GE and Cu(II), Pb(II), Cd(II), Zn(II) at HMDE by Square Wave Anodic Stripping Voltammetry (SWASV). Supporting electrolyte 0.01 mol L EDTA-Na2 + 0.06 mol L ...

Wojciechowski M, Balcerzak J (1991) Square-wave anodic stripping voltammetry of lead and cadmium at cylindrical graphite fiber microelectrodes with in situ plated mercury films. Anal Chim Acta 249 433-445... [Pg.399]

Czop E, Economou A, Bobrowski A (2011) A study of in situ plated tin-film electrodes for the determination of trace metals by means of square-wave anodic stripping voltammetry. Electrochim Acta 56 2206—2212... [Pg.455]

Kounaves SP, Deng W (1993) Analytical utility of the iridium-based mercury ultramicroelectrode with square-wave anodic stripping voltammetry. Anal Chem 65 375-379... [Pg.457]

Popa DE, Buleandra M, Mureseanu M, lonica M, Tanase IG (2010) Carbon paste electrode modified with organofunctionalized mesoporous silica for electrochemical detection and quantitative determination of cadmium(II) using square wave anodic stripping voltammetry. [Pg.487]

Nolan MA, Kouvanes SP (1999) Microfabricated array of iridium microdisks as a substrate for direct determination of Cu or Hg " using square-wave anodic stripping voltammetry. Anal Chem 71 3567-3573... [Pg.609]

Anodic stripping voltammetiy is used to determine various heavy-metal ions in situ without the undesirable presence of Hg. This group also presents a similar device for continuous and on-site heavy metal monitoring (Pb(II))." This polymer lab chip sensor allows 43 consecutive measurements in nondeoxygenating standard solutions inside the microchaimels using square-wave anodic stripping voltammetry. Pb concentrations range 1-1,000 ppb with a LOD of 0.55 ppb and 300 s deposition time. [Pg.644]

Radi A, El-shtaif Z (2002) Determination of levofloxacin in hiunan wine by adsorptive square-wave anodic stripping voltammetry on a glassy carbon electrode. Talanta 58 319-324... [Pg.192]

Gazy AAK (2004) Determination of amlodipine besylate by adsorptive square-wave anodic stripping voltammetry on glassy carbon electrode in tablets and biological fluids. Talanta 62 575-582... [Pg.192]

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