Ion exchange voltammetry at branched polyethylenimine cross-linked with ethylene glycol diglycidyl ether and sensitive determination of ascorbic acid

2013 ◽  
Vol 105 ◽  
pp. 31-39 ◽  
Author(s):  
Vellaichamy Ganesan ◽  
Pankaj Kumar Rastogi ◽  
Rupali Gupta ◽  
Matthew T. Meredith ◽  
Shelley D. Minteer
Keyword(s):  
Ascorbic Acid ◽  
Ion Exchange ◽  
Ethylene Glycol ◽  
Diglycidyl Ether ◽  
Branched Polyethylenimine ◽  
Sensitive Determination

scholarly journals Sensitive determination of gentamicin in plasma using ion-exchange solid-phase extraction followed by UHPLC-MS/MS analysis

2021 ◽  
pp. e00246
Author(s):  
Ana Laura Anibaletto dos Santos ◽  
Anne Caroline Cezimbra da Silva ◽  
Lilian de Lima Feltraco Lizot ◽  
Anelise Schneider ◽  
Roberta Zilles Hahn ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Phase Extraction ◽  
Ms Analysis ◽  
Sensitive Determination

Sensitive Determination of Epinephrine in the Presence of Ascorbic Acid at Poly(diphenylamine sulfonic acid) Modified Sensor

2020 ◽  
Vol 18 (4) ◽  
pp. 253-258
Author(s):  
Gamze Erdoğdu
Keyword(s):  
Ascorbic Acid ◽  
Sulfonic Acid ◽  
Limit Of Detection ◽  
Phosphate Buffer Solution ◽  
Differential Pulse ◽  
Buffer Solution ◽  
Sensitive Determination ◽  
Pulse Voltammetry ◽  
Modified Sensor

A sensitive and simple modified sensor was prepared by electrodeposition of diphenylamine sulfonic acid (DPSA) to the glassy carbon electrode surface by cyclic voltammetry (CV) technique. The electrooxidation of epinephrine (EP) was accomplished by CV and differential pulse voltammetry at poly(DPSA) modified sensor. As a result of the findings, the current values were enhanced and both substances were separated at the modified sensor compared to the bare electrode. There was linearly between the oxidation current and concentration of EP from 0.2 to 100 μM in phosphate buffer solution at pH 7.0. The limit of detection was 5.0 nM and the sensitivity was 0.4205 μA/μM. The determination of EP was successfully and satisfactorily carried out in real samples such as human blood serum and urine at the poly(DPSA) sensor. To the best knowledge of this work, this is the first study that detect the EP in the presence of ascorbic acid at poly(DPSA) sensor in the literature.

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