Speciation of inorganic chromium in river water by graphite furnace-atomic absorption spectrometry after chromabond NH<sub>2</sub> column based solid phase extraction

Mokgohloa, Conny P.; Thomas, Mary S.; Mokgalaka, Ntebogeng S.; Ambushe, Abayneh A.

doi:10.1080/03067319.2020.1779243

Cited by 2 publications

(2 citation statements)

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“…Instances of contact with Cr(VI) through inhaling the dust, dermal contact, and ingestion of Cr(VI) contaminated substances have been linked to nasal septum, asthma, and inflammation of the larynx and liver. Humans and experimental animals have developed dermatitis, and skin ulceration, and shown mutagenic and genotoxic effects on exposure to hexavalent chromium [8,9,[11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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Two-step one-pot speciation of chromium as Cr-APDC-and-NaEDTA complexes followed by ETA-AAS analysis

Salihu,

Bakar

2024

Recent Adv. Nat. Sci

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A two-step preconcentration method involving solid-and-liquid-phase extraction procedures has been proposed for the speciation of chromium in a one-pot system. The method used sodium ethylenediaminetetraacetic acid (NaEDTA) and ammonium pyrrolidinedithiocarbamate (APDC). The Cr(VI)-APDC was extracted with ethyl acetate and digested with nitric acid. while the Cr(III)-EDTA complex ion was adsorbed onto Al2O3 (neutral grade) with the aid of a tetrabutylammonium bromide (TBAB) pairing agent and desorbed with a hydrochloric acid solution. Sample splitting was not required. The ZEEnit 650P, electrothermal atomization atomic absorption spectrometer, (ETA-AAS) was employed for the analysis. The concentration of the chromium (III) in the samples ranged from 1.83±0.00 µg L−1 to 106.28±0.21 µg L−1, while <LOD to 19.85±0.12 µg L−1 was the range of Cr(VI) concentration in the samples. Recovery from spiked samples was between 83% and 117% Cr(III) and 79% and 99% Cr(VI). Precision (n = 6), was 1.87% for Cr(III) and 7.67% for Cr(VI). The limits of detection (LODs), calculated by the Aspect LS software (3σ, n = 11) were 0.42 µg L−1 and 0.62 µg L−1 for Cr(III) and Cr(VI) respectively. The mean total chromium (n = 3), from the certified reference material (CRM), LGC6019 was 0.74±0.61 µg L−1, (certified value = 0.78±0.20 µg L−1). The preconcentration factor: ratio of the Cr(III) content of CRM before and after preconcentration was 3.57. Parameters such as pH, time, temperature, and the amount of adsorbent were optimized by the isolation method. The method was validated and applied for the speciation analysis of chromium in water samples.

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Section: Introductionmentioning

confidence: 99%

“…Due to its numerous industrial applications in wood preservation, leather tanning, electroplating, and steel alloy production, exposure to hexavalent Cr is unavoidable [14][15][16][17]. When discharged into the environment, the atmosphere and aquatic systems serve as means of long-range chromium transport and distribution [9,11].…”

Section: Introductionmentioning

confidence: 99%

Two-step one-pot speciation of chromium as Cr-APDC-and-NaEDTA complexes followed by ETA-AAS analysis

Salihu,

Bakar

2024

Recent Adv. Nat. Sci

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Speciation of chromium in river sediments by graphite furnace-atomic absorption spectrometry after microwave-assisted extraction

Mokgohloa

Thomas

Mokgalaka

et al. 2020

International Journal of Environmental Analytical Chemistry

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Speciation of inorganic chromium in river water by graphite furnace-atomic absorption spectrometry after chromabond NH₂ column based solid phase extraction

Cited by 2 publications

References 30 publications

Two-step one-pot speciation of chromium as Cr-APDC-and-NaEDTA complexes followed by ETA-AAS analysis

Two-step one-pot speciation of chromium as Cr-APDC-and-NaEDTA complexes followed by ETA-AAS analysis

Speciation of chromium in river sediments by graphite furnace-atomic absorption spectrometry after microwave-assisted extraction

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Speciation of inorganic chromium in river water by graphite furnace-atomic absorption spectrometry after chromabond NH2 column based solid phase extraction

Cited by 2 publications

References 30 publications

Two-step one-pot speciation of chromium as Cr-APDC-and-NaEDTA complexes followed by ETA-AAS analysis

Two-step one-pot speciation of chromium as Cr-APDC-and-NaEDTA complexes followed by ETA-AAS analysis

Speciation of chromium in river sediments by graphite furnace-atomic absorption spectrometry after microwave-assisted extraction

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Speciation of inorganic chromium in river water by graphite furnace-atomic absorption spectrometry after chromabond NH₂ column based solid phase extraction