Abstract
Direct current voltammetry (DCV), differential pulse voltammetry (DPV), and differential pulse adsorptive stripping voltammetry (DPAdSV) at a mercury meniscus modified silver solid amalgam electrode (m-AgSAE) were used for the determination of trace amounts of carcinogenic 2-nitrobiphenyl (2-NBP) and 4-nitrobiphenyl (4-NBP) in buffered aqueous-methanolic solutions (for 2-NBP: 0.01 mol L-1 LiOH (pH 12.0) - methanol (9:1), for 4-NBP: 0.25 mol L-1 acetate buffer (AB) of pH 4.8-methanol (7:3)). Both nitrobiphenyls (NBPs) can be determined by DCV and DPV in the concentration range 0.2-100 μmol L-1 (limit of quantification (LQ) of both NBPs for DCV is 0.2 μmol L-1, LQ of 2-NBP and 4-NBP for DPV is 0.1 and 0.2 μmol L-1, respectively). An attempt to decrease the LQ using DPAdSV was not successful, probably due to some competitive adsorption. The optimal medium for the simultaneous determination of 2-NBP and 4-NBP by DPV at the m-AgSAE was: 0.10 mol L-1 AB of pH 6.0-methanol (7:3). The dependences of the peak current on the concentration of individual NBPs in the mixture were linear in the 10-6 and 10-7 mol L-1 concentration ranges. The practical applicability of the newly developed methods was verified using model samples of drinking and river water.
| Original language | English |
|---|---|
| Pages (from-to) | 2155-2169 |
| Number of pages | 15 |
| Journal | International Journal of Electrochemical Science |
| Volume | 10 |
| Issue number | 3 |
| Publication status | Published - 1 Jan 2015 |
| Externally published | Yes |
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Keywords
- Drinking and river water
- Nitrobiphenyls
- Silver solid amalgam electrode
- Simultaneous determination
- Voltammetry
ASJC Scopus subject areas
- Electrochemistry
Cite this
Voltammetric determination of 2-nitrobiphenyl and 4-nitrobiphenyl using a mercury meniscus modified silver solid amalgam electrode. / Horakova, Eva; Smidova, Daniela; Vyskocil, Vlastimil; Barek, Jiri.
In: International Journal of Electrochemical Science, Vol. 10, No. 3, 01.01.2015, p. 2155-2169.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Voltammetric determination of 2-nitrobiphenyl and 4-nitrobiphenyl using a mercury meniscus modified silver solid amalgam electrode
AU - Horakova, Eva
AU - Smidova, Daniela
AU - Vyskocil, Vlastimil
AU - Barek, Jiri
PY - 2015/1/1
Y1 - 2015/1/1
N2 - Direct current voltammetry (DCV), differential pulse voltammetry (DPV), and differential pulse adsorptive stripping voltammetry (DPAdSV) at a mercury meniscus modified silver solid amalgam electrode (m-AgSAE) were used for the determination of trace amounts of carcinogenic 2-nitrobiphenyl (2-NBP) and 4-nitrobiphenyl (4-NBP) in buffered aqueous-methanolic solutions (for 2-NBP: 0.01 mol L-1 LiOH (pH 12.0) - methanol (9:1), for 4-NBP: 0.25 mol L-1 acetate buffer (AB) of pH 4.8-methanol (7:3)). Both nitrobiphenyls (NBPs) can be determined by DCV and DPV in the concentration range 0.2-100 μmol L-1 (limit of quantification (LQ) of both NBPs for DCV is 0.2 μmol L-1, LQ of 2-NBP and 4-NBP for DPV is 0.1 and 0.2 μmol L-1, respectively). An attempt to decrease the LQ using DPAdSV was not successful, probably due to some competitive adsorption. The optimal medium for the simultaneous determination of 2-NBP and 4-NBP by DPV at the m-AgSAE was: 0.10 mol L-1 AB of pH 6.0-methanol (7:3). The dependences of the peak current on the concentration of individual NBPs in the mixture were linear in the 10-6 and 10-7 mol L-1 concentration ranges. The practical applicability of the newly developed methods was verified using model samples of drinking and river water.
AB - Direct current voltammetry (DCV), differential pulse voltammetry (DPV), and differential pulse adsorptive stripping voltammetry (DPAdSV) at a mercury meniscus modified silver solid amalgam electrode (m-AgSAE) were used for the determination of trace amounts of carcinogenic 2-nitrobiphenyl (2-NBP) and 4-nitrobiphenyl (4-NBP) in buffered aqueous-methanolic solutions (for 2-NBP: 0.01 mol L-1 LiOH (pH 12.0) - methanol (9:1), for 4-NBP: 0.25 mol L-1 acetate buffer (AB) of pH 4.8-methanol (7:3)). Both nitrobiphenyls (NBPs) can be determined by DCV and DPV in the concentration range 0.2-100 μmol L-1 (limit of quantification (LQ) of both NBPs for DCV is 0.2 μmol L-1, LQ of 2-NBP and 4-NBP for DPV is 0.1 and 0.2 μmol L-1, respectively). An attempt to decrease the LQ using DPAdSV was not successful, probably due to some competitive adsorption. The optimal medium for the simultaneous determination of 2-NBP and 4-NBP by DPV at the m-AgSAE was: 0.10 mol L-1 AB of pH 6.0-methanol (7:3). The dependences of the peak current on the concentration of individual NBPs in the mixture were linear in the 10-6 and 10-7 mol L-1 concentration ranges. The practical applicability of the newly developed methods was verified using model samples of drinking and river water.
KW - Drinking and river water
KW - Nitrobiphenyls
KW - Silver solid amalgam electrode
KW - Simultaneous determination
KW - Voltammetry
UR - http://www.scopus.com/inward/record.url?scp=84929397965&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84929397965&partnerID=8YFLogxK
M3 - Article
VL - 10
SP - 2155
EP - 2169
JO - International Journal of Electrochemical Science
JF - International Journal of Electrochemical Science
SN - 1452-3981
IS - 3
ER -