Research output: Contribution to journal › Article › peer-review
Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Bismuth-coated screen-printed electrodes for the simple voltammetric determination of formaldehyde
AU - Malakhova, Nataliya
AU - Mozharovskaia, Polina
AU - Kifle, Alexander Berhane
AU - Kozitsina, Alisa
PY - 2022/8/22
Y1 - 2022/8/22
N2 - For the first time, bismuth modified electrodes have been used for the voltammetric detection of formaldehyde (FM). The well-known method of forming formaldehyde hydrazone (FAH) in the presence of hydrazine sulphate was used to convert the hydrated form of FM into its electrochemically active derivative. Various experimental conditions for differential pulse voltammetry were studied to achieve the best analytical performance. The FAH reduction current (FM response) reaches its maximum value at a pH of a phosphate buffer solution of 5.2 ± 0.1 in the presence of 0.09-0.12 M hydrazine sulfate on a bismuth film preliminarily precipitated for 8-12 min from acidic Bi(iii) acetate solutions at an electrolysis potential of −1.0 V on the surface of a screen-printed carbon electrode (SPCE). A dendritic-like film structure was created on the SPCE surface. Under the optimized conditions a linear calibration curve over the range of 0.01-5 mg L−1 (0.33-167 μM) FM was achieved, with a detection limit of 0.002 mg L−1 (0.06 μM). The determination of FM in waste water, melt water from snow within the city industrial zone, and a widely used pharmaceutical preparation “Endofalk®” with good results revealed the potential applicability of a bismuth modified SPCE (BiSPCE) for trace analysis. © 2022 The Royal Society of Chemistry.
AB - For the first time, bismuth modified electrodes have been used for the voltammetric detection of formaldehyde (FM). The well-known method of forming formaldehyde hydrazone (FAH) in the presence of hydrazine sulphate was used to convert the hydrated form of FM into its electrochemically active derivative. Various experimental conditions for differential pulse voltammetry were studied to achieve the best analytical performance. The FAH reduction current (FM response) reaches its maximum value at a pH of a phosphate buffer solution of 5.2 ± 0.1 in the presence of 0.09-0.12 M hydrazine sulfate on a bismuth film preliminarily precipitated for 8-12 min from acidic Bi(iii) acetate solutions at an electrolysis potential of −1.0 V on the surface of a screen-printed carbon electrode (SPCE). A dendritic-like film structure was created on the SPCE surface. Under the optimized conditions a linear calibration curve over the range of 0.01-5 mg L−1 (0.33-167 μM) FM was achieved, with a detection limit of 0.002 mg L−1 (0.06 μM). The determination of FM in waste water, melt water from snow within the city industrial zone, and a widely used pharmaceutical preparation “Endofalk®” with good results revealed the potential applicability of a bismuth modified SPCE (BiSPCE) for trace analysis. © 2022 The Royal Society of Chemistry.
UR - https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=tsmetrics&SrcApp=tsm_test&DestApp=WOS_CPL&DestLinkType=FullRecord&KeyUT=000842596100001
UR - http://www.scopus.com/inward/record.url?partnerID=8YFLogxK&scp=85137298058
U2 - 10.1039/D2AY00876A
DO - 10.1039/D2AY00876A
M3 - Article
VL - 14
SP - 3423
EP - 3433
JO - Analytical methods
JF - Analytical methods
SN - 1759-9660
IS - 35
ER -
ID: 30948513