Biomaterial Database

Sensitive determination of arsenite by capillary zone electrophoresis with direct photometric detection. 1997

N G Vanifatova, and Spivakova BYa, and J Mattusch, and R Wennrich

Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Science, Moscow, Russia.

The effect of the sample matrix type (water and aqueous solutions containing phosphate buffer, 3-[cyclohexylamino]-1-propanesulfonic acid [CAPS], and sodium chloride solutions) on the migration behavior and peak parameters of As(III), As(V), and dimethylarsinate was studied. CAPS is found to be the most effective additive for As(III) peak amplification. The reasons for additive influence are discussed. The pH of the carrier electrolyte has been optimized with respect to As(III) peak height and shift of the peak position in electropherograms from the position of the sample matrix plug. Under optimal conditions, a peak efficiency expressed as the number of theoretical plates per meter (N) of 50,460 and a detection limit of 0.05 mg L-1 for As(III) were achieved.

UI	MeSH Term	Description	Entries
D012680	Sensitivity and Specificity	Binary classification measures to assess test results. Sensitivity or recall rate is the proportion of true positives. Specificity is the probability of correctly determining the absence of a condition. (From Last, Dictionary of Epidemiology, 2d ed)	Specificity,Sensitivity,Specificity and Sensitivity
D018053	Arsenites	Inorganic salts or organic esters of arsenious acid.
D019075	Electrophoresis, Capillary	A highly-sensitive (in the picomolar range, which is 10,000-fold more sensitive than conventional electrophoresis) and efficient technique that allows separation of PROTEINS; NUCLEIC ACIDS; and CARBOHYDRATES. (Segen, Dictionary of Modern Medicine, 1992)	Capillary Zone Electrophoresis,Capillary Electrophoreses,Capillary Electrophoresis,Capillary Zone Electrophoreses,Electrophoreses, Capillary,Electrophoreses, Capillary Zone,Electrophoresis, Capillary Zone,Zone Electrophoreses, Capillary,Zone Electrophoresis, Capillary