Highly sensitive determination of heavy metals in upland and lowland rice using AgNP/BiNP/MWCNT/nafion modified glassy carbon electrode via anodic stripping voltammetry
It is of prime importance to determine the presence of trace heavy metals, especially cadmium (Cd2 ^+ ) and lead (Pb2 ^+ ) in rice to ensure food safety as it is the staple source of the daily caloric intake of Asians. This work utilized anodic stripping voltammetry (ASV) for the determination of he...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2020-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/ab6ada |
| _version_ | 1797746926653800448 |
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| author | Shirley T Palisoc Royce Vincent M Chua Michelle T Natividad |
| author_facet | Shirley T Palisoc Royce Vincent M Chua Michelle T Natividad |
| author_sort | Shirley T Palisoc |
| collection | DOAJ |
| description | It is of prime importance to determine the presence of trace heavy metals, especially cadmium (Cd2 ^+ ) and lead (Pb2 ^+ ) in rice to ensure food safety as it is the staple source of the daily caloric intake of Asians. This work utilized anodic stripping voltammetry (ASV) for the determination of heavy metals due to its portability for in situ measurements. A glassy electrode modified with silver nanoparticles (AgNP), bismuth nanoparticles (BiNP), multiwalled carbon nanotubes (MWCNT) and Nafion was fabricated to serve as the working electrode. The morphology of the fabricated electrode was characterized using scanning electron microscopy and x-ray diffraction, its elemental composition was determined by energy dispersive spectroscopy, its chemical bonds were identified using Fourier transform infrared spectroscopy, and its electrochemical behavior was measured via cyclic voltammetry. The electrode showed high stability at 50 continuous scans. The optimal deposition time, accumulation time and scan rate were determined to be 80 s, 60 s and 100 mV s−1, respectively. The detection limit for Cd2 ^+ and Pb2 ^+ were determined to be 25.12 ppb and 20.55 ppb, respectively. Rice samples were analyzed and the transfer factor of the heavy metals were determined at each isolated part. The ASV results were validated with atomic absorption spectroscopy. |
| first_indexed | 2024-03-12T15:44:45Z |
| format | Article |
| id | doaj.art-209ab970c222489a883209a6b98cf9cd |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:44:45Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-209ab970c222489a883209a6b98cf9cd2023-08-09T15:31:39ZengIOP PublishingMaterials Research Express2053-15912020-01-017101508110.1088/2053-1591/ab6adaHighly sensitive determination of heavy metals in upland and lowland rice using AgNP/BiNP/MWCNT/nafion modified glassy carbon electrode via anodic stripping voltammetryShirley T Palisoc0Royce Vincent M Chua1Michelle T Natividad2https://orcid.org/0000-0002-0140-7545Physics Department, De La Salle University , 2401 Taft Avenue, Manila, Philippines; Condensed matter Research Unit, CENSER, De La Salle University , 2401 Taft Avenue, Manila, PhilippinesPhysics Department, De La Salle University , 2401 Taft Avenue, Manila, PhilippinesPhysics Department, De La Salle University , 2401 Taft Avenue, Manila, Philippines; Condensed matter Research Unit, CENSER, De La Salle University , 2401 Taft Avenue, Manila, PhilippinesIt is of prime importance to determine the presence of trace heavy metals, especially cadmium (Cd2 ^+ ) and lead (Pb2 ^+ ) in rice to ensure food safety as it is the staple source of the daily caloric intake of Asians. This work utilized anodic stripping voltammetry (ASV) for the determination of heavy metals due to its portability for in situ measurements. A glassy electrode modified with silver nanoparticles (AgNP), bismuth nanoparticles (BiNP), multiwalled carbon nanotubes (MWCNT) and Nafion was fabricated to serve as the working electrode. The morphology of the fabricated electrode was characterized using scanning electron microscopy and x-ray diffraction, its elemental composition was determined by energy dispersive spectroscopy, its chemical bonds were identified using Fourier transform infrared spectroscopy, and its electrochemical behavior was measured via cyclic voltammetry. The electrode showed high stability at 50 continuous scans. The optimal deposition time, accumulation time and scan rate were determined to be 80 s, 60 s and 100 mV s−1, respectively. The detection limit for Cd2 ^+ and Pb2 ^+ were determined to be 25.12 ppb and 20.55 ppb, respectively. Rice samples were analyzed and the transfer factor of the heavy metals were determined at each isolated part. The ASV results were validated with atomic absorption spectroscopy.https://doi.org/10.1088/2053-1591/ab6adatrace heavy metalsanodic stripping voltammetrysilver nanoparticlesbismuth nanoparticlesmultiwalled carbon nanotubes |
| spellingShingle | Shirley T Palisoc Royce Vincent M Chua Michelle T Natividad Highly sensitive determination of heavy metals in upland and lowland rice using AgNP/BiNP/MWCNT/nafion modified glassy carbon electrode via anodic stripping voltammetry Materials Research Express trace heavy metals anodic stripping voltammetry silver nanoparticles bismuth nanoparticles multiwalled carbon nanotubes |
| title | Highly sensitive determination of heavy metals in upland and lowland rice using AgNP/BiNP/MWCNT/nafion modified glassy carbon electrode via anodic stripping voltammetry |
| title_full | Highly sensitive determination of heavy metals in upland and lowland rice using AgNP/BiNP/MWCNT/nafion modified glassy carbon electrode via anodic stripping voltammetry |
| title_fullStr | Highly sensitive determination of heavy metals in upland and lowland rice using AgNP/BiNP/MWCNT/nafion modified glassy carbon electrode via anodic stripping voltammetry |
| title_full_unstemmed | Highly sensitive determination of heavy metals in upland and lowland rice using AgNP/BiNP/MWCNT/nafion modified glassy carbon electrode via anodic stripping voltammetry |
| title_short | Highly sensitive determination of heavy metals in upland and lowland rice using AgNP/BiNP/MWCNT/nafion modified glassy carbon electrode via anodic stripping voltammetry |
| title_sort | highly sensitive determination of heavy metals in upland and lowland rice using agnp binp mwcnt nafion modified glassy carbon electrode via anodic stripping voltammetry |
| topic | trace heavy metals anodic stripping voltammetry silver nanoparticles bismuth nanoparticles multiwalled carbon nanotubes |
| url | https://doi.org/10.1088/2053-1591/ab6ada |
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