Carbon Paste Electrode as a Support for Mercury Film in Potentiometric Stripping Determination of Heavy Metals

2000 ◽  
Vol 65 (6) ◽  
pp. 1047-1054 ◽  
Author(s):  
Jiří Konvalina ◽  
Elmorsy Khaled ◽  
Karel Vytřas
Keyword(s):  
Heavy Metals ◽  
Electrode Materials ◽  
Graphite Furnace ◽  
Absorption Spectrometry ◽  
Carbon Paste ◽  
Mercury Film ◽  
Potentiometric Stripping Analysis ◽  
Reference Determination ◽  
Paste Electrode

Carbon paste electrodes containing silicone or paraffin oil as the pasting liquids, preplated with a mercury film, were tested for possible use in potentiometric stripping determination of heavy metals like lead, cadmium and copper. The detailed study has shown that the results are comparable with those obtained with widely used mercury-coated glassy carbon electrode with regard to the linear response at low ppb levels, detection limits, reproducibility, etc. The potentiometric stripping analysis with both electrode materials was used for the determination of lead and copper in a soot sample. No significant differences were found when these results were compared with a reference determination performed by graphite-furnace atomic absorption spectrometry.

scholarly journals Determination of Cd, Mn and Ni accumulated in fruits, vegetables and soil in the Thohoyandou town area, South Africa

Water SA ◽  
2020 ◽  
Vol 46 (2 April) ◽  
Author(s):  
Babra Moyo ◽  
Vhahangwele Matodzi ◽  
Malebogo A Legodi ◽  
Vusumzi E Pakade ◽  
Nikita T Tavengwa
Keyword(s):  
Heavy Metals ◽  
South Africa ◽  
Fruits And Vegetables ◽  
Graphite Furnace ◽  
Absorption Spectrometry ◽  
Dry Weight ◽  
Limpopo Province ◽  
Leafy Vegetables ◽  
Town Area

The accumulation of heavy metals such as Cd, Mn and Ni was investigated in seven different vegetables, fruits and soil samples from Thohoyandou, Limpopo Province, South Africa. Heavy metals were quantified using graphite furnace atomic absorption spectrometry. Concentrations of heavy metals in fruits and vegetables were in the range of 0.23–2.94 mg∙kg-1 for Cd, 11.72–50.16 mg∙kg-1 for Mn and 5.73 – 44.11 mg∙kg-1 for Ni on a dry weight basis. Analysis of soils from where fruits and vegetables were sampled showed that Cd in the soil was in the range of 0.08–1.07 mg∙kg-1, Mn levels were 204.99–249.13 mg∙kg-1 and Ni levels were 48.47–88.23 mg∙kg-1. Cd was below the instrument detection limit for soils on which onions and bananas were grown. Vegetables showed different accumulation abilities, with leafy vegetables being the highest accumulators of heavy metals. The obtained results showed that concentrations of Cd in fruits, vegetables and soils exceeded the recommended maximum acceptable levels proposed by FAO/WHO and, hence, may pose a health risk to consumers. Ni concentrations in bananas, onion, beetroot, spinach and Chinese cabbage exceeded recommended standards by FAO/WHO.

Bi-Film on a carbon paste electrode modified with nafion film embedded with multiwall carbon nano tubes for the determination of heavy metals

2011 ◽  
Vol 3 (11) ◽  
pp. 2540 ◽  
Author(s):  
M. K. Dey ◽  
A. K. Satpati ◽  
S. Sahoo ◽  
R. Kameswaran ◽  
A. V. R. Reddy ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Carbon Paste Electrode ◽  
Carbon Paste ◽  
Nafion Film ◽  
Carbon Nano Tubes ◽  
Paste Electrode ◽  
Multiwall Carbon

Determination of heavy metals in cigarettes using high-resolution continuum source graphite furnace atomic absorption spectrometry

2017 ◽  
Vol 9 (27) ◽  
pp. 4033-4043 ◽  
Author(s):  
Ting Ren ◽  
Xi Chen ◽  
Yao Ge ◽  
Lijiao Zhao ◽  
Rugang Zhong
Keyword(s):  
Heavy Metals ◽  
High Resolution ◽  
Quantitative Determination ◽  
Tobacco Smoke ◽  
Toxic Metals ◽  
Graphite Furnace ◽  
Absorption Spectrometry ◽  
Continuum Source ◽  
Graphite Furnace Atomic Absorption

Quantitative determination of toxic metals in tobacco, smoke, ash and butts of cigarettes using HR-CS GFAAS.

scholarly journals Quality and safety of some commercial spices brands

2013 ◽  
pp. 1-9 ◽  
Author(s):  
Slavica Blagojevic ◽  
Stevan Blagojevic ◽  
Natasa Pejic ◽  
Biljana Begovic ◽  
Spasenka Gajinov
Keyword(s):  
Heavy Metals ◽  
Graphite Furnace ◽  
Microwave Digestion ◽  
Hydride Generation ◽  
Absorption Spectrometry ◽  
Human Consumption ◽  
Quality And Safety ◽  
Sweet Basil ◽  
Graphite Furnace Aas

In this study, in order to evaluate the quality and safety of selected commercial spices brands, contents of moisture and minerals, as well as the concentration of certain heavy metals (As, Hg and Pb) were determined in oregano, sweet basil, parsley and celery. The spice samples were subjected to microwave digestion, and were analyzed by atomic absorption spectrometry (AAS), using hydride generation AAS technique, cold vapor AAS technique, and graphite furnace AAS technique for determination of As, Hg and Pb, respectively. Maximum concentrations of As and Pb were determined in the same brand sample of celery, and are 0.75 ppm and 0.40 ppm, respectively, while the maximum concentration of Hg in various brands sweet basil samples is 0.05 ppm. According to the results, the contents of moisture and minerals, as well as the concentrations of heavy metals in all selected spices were below the maximum permissible limits declared by the national legislations, and are safe for human consumption.

scholarly journals Determination of Cd, Mn and Ni accumulated in fruits, vegetables and soil in the Thohoyandou town area, South Africa

Water SA ◽  
2020 ◽  
Vol 46 (2 April) ◽  
Author(s):  
Babra Moyo ◽  
Vhahangwele Matodzi ◽  
Malebogo A Legodi ◽  
Vusumzi E Pakade ◽  
Nikita T Tavengwa
Keyword(s):  
Heavy Metals ◽  
South Africa ◽  
Fruits And Vegetables ◽  
Graphite Furnace ◽  
Absorption Spectrometry ◽  
Dry Weight ◽  
Limpopo Province ◽  
Leafy Vegetables ◽  
Town Area

The accumulation of heavy metals such as Cd, Mn and Ni was investigated in seven different vegetables, fruits and soil samples from Thohoyandou, Limpopo Province, South Africa. Heavy metals were quantified using graphite furnace atomic absorption spectrometry. Concentrations of heavy metals in fruits and vegetables were in the range of 0.23–2.94 mg∙kg-1 for Cd, 11.72–50.16 mg∙kg-1 for Mn and 5.73 – 44.11 mg∙kg-1 for Ni on a dry weight basis. Analysis of soils from where fruits and vegetables were sampled showed that Cd in the soil was in the range of 0.08–1.07 mg∙kg-1, Mn levels were 204.99–249.13 mg∙kg-1 and Ni levels were 48.47–88.23 mg∙kg-1. Cd was below the instrument detection limit for soils on which onions and bananas were grown. Vegetables showed different accumulation abilities, with leafy vegetables being the highest accumulators of heavy metals. The obtained results showed that concentrations of Cd in fruits, vegetables and soils exceeded the recommended maximum acceptable levels proposed by FAO/WHO and, hence, may pose a health risk to consumers. Ni concentrations in bananas, onion, beetroot, spinach and Chinese cabbage exceeded recommended standards by FAO/WHO.

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