Inorganic arsenic speciation by differential pulse anodic stripping voltammetry using thoria nanoparticles-carbon paste electrodes

Inorganic arsenic speciation by electroanalysis. From laboratory to field conditions: A mini-review

“…(5) The analysis can be simplified by: the replacement of precious metal electrodes by inexpensive materials [44,47,33,60,[99][100][101][102][103][104]; analysis without removing oxygen from solution [38,55,75,91]; minimizing the sample preparation stage by eliminating the reduction of As(V) to As(III), and speciation of As in the field. Automation of procedures is helpful and there has been some research aimed at creating microfluidic total analysis systems which would be ideal for this purpose [4].…”

Fully-automated magnetic stirring-assisted lab-in-syringe dispersive liquid–liquid microextraction for the determination of arsenic species in rice samples

“…In general, several element-specic and sensitive instrumental techniques [2][3][4][5][6][7][8][9][10][11] have been successfully utilized for direct analysis of total amount of As at trace levels. To obtain information about the toxicities, biochemical, bioavailability and environmental behavior of arsenite and arsenate species, it is necessary to develop sensitive and selective methodologies for the qualitative and quantitative analysis of these individual inorganic arsenic species.…”

Gold Nano Particle and Reduced Graphene Oxide Composite Modified Carbon Paste Electrode for the Ultra Trace Detection of Arsenic (III)

“…There have been enormous different ways of modification procedure investigated and several reviews are published on the determination of arsenic [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38], Carbon based electrode modified with gold nano particles has the advantage over other modified electrodes due to their ability to decrease the interferences from organic matrices and the interference due to some commonly occurring metal ions [39][40][41][42][43][44][45]. In two recent publications reduced graphene oxide and gold nano particles composite modified glassy carbon and thoria nano particles modified carbon paste electrodes were used for the determination of arsenic [46,47]. Present investigation is based on the fabrication of AuNPs and reduced graphene oxide composite (AuNPs/RGO) modified carbon paste electrode for the determination and inorganic speciation of arsenic.…”

“…Carbon paste electrode was used to add its advantage of easy renewability over the other solid electrodes. Though the basic aspect of the modification of the glassy carbon electrode using RGO and AuNPs composite has been discussed previously for the determination of As [47], present work has focused more on the practical aspects and usability of the carbon paste modified electrode for the determination. Reduced graphene oxide composite materials were synthesised and the modified electrode was fabricated to make it suitable for the determination of arsenic in natural samples.…”