Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Inorganic arsenic and selenium determination using miniaturised isotachophoresis
AU - Prest, J. E.
AU - Baldock, S. J.
AU - Fielden, P. R.
AU - Goddard, N. J.
AU - Brown, B. J. T.
PY - 2005/11
Y1 - 2005/11
N2 - A new method allowing the simultaneous determination of arsenic(V), selenium(IV) and selenium(VI) using miniaturised isotachophoresis has been developed. The method uses 0.02 M nitric acid buffered to pH 5.5 with histidine as the leading electrolyte. Using a miniaturised poly(methyl methacrylate) chip device with an integrated conductivity detector, separations of model samples and an industrial process stream sample were achieved. Limits of detection were calculated to be 0.85 mg L−1 for arsenic(V), 0.95 mg L−1 for selenium(IV) and 1.0 mg L−1 for selenium(VI). A method for the analysis of arsenic(III), using a glycolic acid based leading electrolyte to eliminate carbonate interference is also presented.
AB - A new method allowing the simultaneous determination of arsenic(V), selenium(IV) and selenium(VI) using miniaturised isotachophoresis has been developed. The method uses 0.02 M nitric acid buffered to pH 5.5 with histidine as the leading electrolyte. Using a miniaturised poly(methyl methacrylate) chip device with an integrated conductivity detector, separations of model samples and an industrial process stream sample were achieved. Limits of detection were calculated to be 0.85 mg L−1 for arsenic(V), 0.95 mg L−1 for selenium(IV) and 1.0 mg L−1 for selenium(VI). A method for the analysis of arsenic(III), using a glycolic acid based leading electrolyte to eliminate carbonate interference is also presented.
KW - Isotachophoresis
KW - Miniaturisation
KW - chip
KW - Arsenic
KW - Selenium
U2 - 10.1007/s00604-005-0403-y
DO - 10.1007/s00604-005-0403-y
M3 - Journal article
VL - 151
SP - 223
EP - 230
JO - Microchimica Acta
JF - Microchimica Acta
SN - 0026-3672
IS - 3-4
ER -