Determination of traces molybdenum by catalytic adsorptive stripping voltammetry

Determination and validation method of molybdenum by adsorptive catalytic stripping voltammetry at lead film electrode

“…The complexing agents are generally used for voltammetric determination of molybdenum to form stable Mo(VI)-organic ligand complexes and all methods are based on adsorption controlled electrode reaction. These ligands are oxine [5][6][7], methyl thymol blue [8,9], chloranilic acid [10][11][12][13][14], ɑ-benzoin oxime [15][16][17][18], cupferron [19,20], dihydroxynaphtalene [21], p-cresol derivative [22], 1,10-phenanthroline [23], methyl orange [24], 8-hydroxyquinoline [25], pyrogallol red [26,27], mandelic acid [28], cetyltrimethylammonium bromide (CTAB) [29], tiron [30], morin [31], alizarin violet [32], alizarin red s [4,33,34] and azo compounds [35]. These methods were summarized in Table 1.…”

Determination of molybdenum by adsorptive anodic stripping voltammetry of molybdenum–alizarin violet complex at an acetylene black paste electrode

“…Specifically, adsorptive stripping voltammetry (AdSV) and catalytic adsorptive stripping voltammetry (CAdSV) has proven useful for trace Mo detection since it combines excellent sensitivity, selectivity, accuracy and precision with low cost of instrumentation and maintenance. AdSV and CAdSV were applied after converting Mo(VI) into stable complexes with numerous organic ligands, such as 8-hydroxyquinoline (Oxine) (Sun, Mierzwa, & Lan, 2000), chloranilic acid (Piech, Bas, & Kubiak, 2008), pyrogallol red (Ensafi, Khayamian, & Khaloo, 2004), cupferron (Ensafi, Khayamian, & Atabati, 2002), toluidine blue (Zhao, Pei, Zhang, & Zhou, 1990), tiron (Ensafi & Khaloo, 2005), pyrocatechol violet (Zarei, Atabati, & Ilkhani, 2006), methyl thymol blue (Safavi & Shams, 1999) and 2-(2 0 -thiazolylazo)-p-cresol (Farias, Ohara, Nóbrega, & Gold, 1994). Almost all voltammetric methods apply mercury electrodes.…”

Direct electrochemical response of glucose at nickel-doped diamond like carbon thin film electrodes

“…Mercury film electrodes have often been used to detect trace heavy metals, but their cost and disposal are the main concerns. The toxicity of mercury has motivated sensor technologists to develop mercury-free electrodes [7][8][9]. Atomic carbon is short-lived species and hence carbon is stabilized in various multi-atomic structures with different molecular configurations called allotropes.…”