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Rubinskaya, T. B.; Ковалева, С. В.; Kulagin, E. M.; Gladyshev, V. P.

doi:10.1023/a:1022314323176

Cited by 10 publications

(4 citation statements)

References 11 publications

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“…A number of techniques have recently been published on the quantitation of selenium at low levels in natural waters . Among these, voltammtery has received some attention [13][14][15][16], because of its high sensitivity and ability to detect the redox species of metals; in the case of selenium analysis, the detection limit of selenite can be as sensitive as 75 ng/L [14]. However, selenate cannot be determined directly [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…Among these, voltammtery has received some attention [13][14][15][16], because of its high sensitivity and ability to detect the redox species of metals; in the case of selenium analysis, the detection limit of selenite can be as sensitive as 75 ng/L [14]. However, selenate cannot be determined directly [13][14][15][16]. Additionally, the interference of metals on selenite analysis by voltammtery is significant, for example, Cd(II) might suppress 50% of the selenite peak and Pb(II) could shift the peak to −0.75 V [14].…”

Section: Introductionmentioning

confidence: 99%

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Inorganic selenium speciation in groundwaters by solid phase extraction on Dowex 1X2

Lin

2007

Journal of Hazardous Materials

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Inorganic selenium speciation in groundwaters by solid phase extraction on Dowex 1X2

Lin

2007

Journal of Hazardous Materials

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“…To date, stripping voltammetry with the use of modified solid electrodes has been the most widely used approach. Various electrode modifiers, including mercury films [19], boron-doped gold-modification of diamond electrodes [20] as well as direct detection with platinum and gold electrodes, microband electrode array [21] and a rotating gold electrode [22], were typically employed for Se determination. Also, the use of nanomaterials opens up new possibilities in the detection of selenium anions.…”

Section: Introductionmentioning

confidence: 99%

Aptamer and Electrochemical Aptasensor towards Selenate Ions (SeO<sub>4</sub><sup>2-</sup>)

Szymczyk,

Popiołek,

Baran

et al. 2024

Preprint

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Selenium is one of the inorganic compounds in human and animal nutrition and is involved in the proper functioning of the body. As a micronutrient, it actively contributes to the regulation of various metabolic activities, i.e., thyroid hormone, and protection against oxidative stress and cancer. Selenium anion also plays an essential role in the mechanism of immunity to viral infec-tions. However, this element can also be hazardous, especially in high concentrations. The toxicity of selenium is strongly associated with its chemical form. Se exhibits a narrow concentration window from having a positive to exerting a toxic effect. The daily uptake for humans is in the range of 55-400 µg/day. In higher doses (of the order of 900-1000 µg/day), it negatively affects the human body and causes DNA damage through the formation of free radicals. Increased reactivity of Se anion can also disrupt the integrity and function of DNA-repairing proteins. As the permis-sible concentration of Se in drinking water is 10 µg/L, it is vital to develop sensitive and robust methods of Se detection in aqueous samples.

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“…To date, stripping voltammetry with the use of modified solid electrodes has been the most widely used approach. Various electrode modifiers, including mercury films [ 19 ], boron-doped gold modification of diamond electrodes [ 20 ] as well as direct detection with platinum and gold electrodes, microband electrode array [ 21 ] and a rotating gold electrode [ 22 ], have typically been employed for Se determination. Also, the use of nanomaterials opens up new possibilities in the detection of selenium anions.…”

Section: Introductionmentioning

confidence: 99%

Aptamer and Electrochemical Aptasensor towards Selenate Ions (SeO42−)

Szymczyk,

Popiołek,

Baran

et al. 2024

IJMS

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Selenium is an essential inorganic compound in human and animal nutrition, involved in the proper functioning of the body. As a micronutrient, it actively contributes to the regulation of various metabolic activities, i.e., thyroid hormone, and protection against oxidative stress. However, Se exhibits a narrow concentration window between having a positive effect and exerting a toxic effect. In higher doses, it negatively affects living organisms and causes DNA damage through the formation of free radicals. Increased reactivity of Se anions can also disrupt the integrity and function of DNA-repairing proteins. As the permissible concentration of Se in drinking water is 10 µg/L, it is vital to develop sensitive and robust methods of Se detection in aqueous samples. In this study, for the first time, we proposed a selective aptamer for selenate ion detection, chosen following the SELEX process, and its application in the construction of an electrochemical aptasensor towards SeO42− ions. Measurement conditions such as the used redox marker and pH value of the measurement solution were chosen. The proposed aptasensor is characterized by good selectivity and an LOD of 1 nM. Conditions for biosensor regeneration and storage were also investigated in this research.

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Cited by 10 publications

References 11 publications

Inorganic selenium speciation in groundwaters by solid phase extraction on Dowex 1X2

Inorganic selenium speciation in groundwaters by solid phase extraction on Dowex 1X2

Aptamer and Electrochemical Aptasensor towards Selenate Ions (SeO<sub>4</sub><sup>2-</sup>)

Aptamer and Electrochemical Aptasensor towards Selenate Ions (SeO42−)

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