The simultaneous determination of omethoate and dichlorvos pesticides in grain samples using a palladium and graphene composite modified glassy carbon electrode. Issue 28 (25th February 2015)
- Record Type:
- Journal Article
- Title:
- The simultaneous determination of omethoate and dichlorvos pesticides in grain samples using a palladium and graphene composite modified glassy carbon electrode. Issue 28 (25th February 2015)
- Main Title:
- The simultaneous determination of omethoate and dichlorvos pesticides in grain samples using a palladium and graphene composite modified glassy carbon electrode
- Authors:
- Prasad, M. Siva
Krishnaveni, K.
Dhananjayulu, M.
Sreenivasulu, V.
Sreedhar, N. Y. - Abstract:
- Abstract : An electrochemical sensor based on a palladium (Pd) and graphene (Gr) composite modified GCE was fabricated, characterised and used for the simultaneous determination of OMT and DCV in grain samples. Abstract : An electrochemical sensor based on a palladium (Pd) and graphene (Gr) composite modified glassy carbon electrode (GCE) was fabricated, characterised and used for the simultaneous determination of omethoate (OMT) and dichlorvos (DCV) in grain samples. The Pd/Gr/GCE was characterized by scanning electron microscopy (SEM) and cyclic voltammograms (CV). The modified electrode displayed a greatly improved voltammetric response to OMT and DCV. Square wave voltammetry (SWV) was used for the individual and simultaneous determination of OMT and DCV. Various conditions were optimized, such as the pH of the buffer, the applied sample volume, the accumulation potential, the accumulation time, the square wave frequency and the step potential. Well defined reduction (OMT at CO, DCV at CC) peaks were obtained over the potential maximum in an acidic medium in phosphate buffer solution at −0.50 V and −0.80 V for both OMT and DCV. Low current peaks were obtained over the concentration of 3.50 × 10 −8 M with detection limits 2.47 × 10 −10 M and 3.28 × 10 −10 M for OMT and DCV respectively. The composite modified electrode showed good stability and reproducibility. Therefore, the proposed method was successfully applied as an economical and simple sensor with a shorterAbstract : An electrochemical sensor based on a palladium (Pd) and graphene (Gr) composite modified GCE was fabricated, characterised and used for the simultaneous determination of OMT and DCV in grain samples. Abstract : An electrochemical sensor based on a palladium (Pd) and graphene (Gr) composite modified glassy carbon electrode (GCE) was fabricated, characterised and used for the simultaneous determination of omethoate (OMT) and dichlorvos (DCV) in grain samples. The Pd/Gr/GCE was characterized by scanning electron microscopy (SEM) and cyclic voltammograms (CV). The modified electrode displayed a greatly improved voltammetric response to OMT and DCV. Square wave voltammetry (SWV) was used for the individual and simultaneous determination of OMT and DCV. Various conditions were optimized, such as the pH of the buffer, the applied sample volume, the accumulation potential, the accumulation time, the square wave frequency and the step potential. Well defined reduction (OMT at CO, DCV at CC) peaks were obtained over the potential maximum in an acidic medium in phosphate buffer solution at −0.50 V and −0.80 V for both OMT and DCV. Low current peaks were obtained over the concentration of 3.50 × 10 −8 M with detection limits 2.47 × 10 −10 M and 3.28 × 10 −10 M for OMT and DCV respectively. The composite modified electrode showed good stability and reproducibility. Therefore, the proposed method was successfully applied as an economical and simple sensor with a shorter analysis time. … (more)
- Is Part Of:
- RSC advances. Volume 5:Issue 28(2015)
- Journal:
- RSC advances
- Issue:
- Volume 5:Issue 28(2015)
- Issue Display:
- Volume 5, Issue 28 (2015)
- Year:
- 2015
- Volume:
- 5
- Issue:
- 28
- Issue Sort Value:
- 2015-0005-0028-0000
- Page Start:
- 21909
- Page End:
- 21915
- Publication Date:
- 2015-02-25
- Subjects:
- Chemistry -- Periodicals
540.5 - Journal URLs:
- http://pubs.rsc.org/en/Journals/JournalIssues/RA ↗
http://www.rsc.org/ ↗ - DOI:
- 10.1039/c4ra16587j ↗
- Languages:
- English
- ISSNs:
- 2046-2069
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 8036.750300
British Library DSC - BLDSS-3PM
British Library STI - ELD Digital store - Ingest File:
- 9864.xml