Determination of bismuth in environmental samples with Mg–W cell–electrothermal atomic absorption spectrometry

Itoh, Syn-ichi; Kaneco, Satoshi; Ohta, Kouji; Mizuno, Takayuki

doi:10.1016/s0003-2670(98)00706-5

Cited by 37 publications

(21 citation statements)

References 14 publications

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“…However, a number of toxic effects in humans have been attributed to bismuth compounds such as, nephropathy, osteoarthropathy, hepatitis, and neuropathology. 33 As the use of bismuth in medicines is increasing, it has spread in the environment and the exposure of organisms to bismuth has increased. 34 In this report we explore the interaction of the morin plus its complex (Bi-complex) with calf thymus DNA, using spectrophotometric, fluorimetric and cyclic voltammetry methods.…”

Section: Introductionmentioning

confidence: 99%

Study on the interaction between morin-bi(III) complex and DNA with the use of methylene blue dye as a fluorophor probe

Ensafi

Hajian

Ebrahimi

2009

J. Braz. Chem. Soc.

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Com base em nossa investigação, ambos os complexos, morin-Bi(III) e Morin, podem vincularse ao DNA, embora a natureza da ligação seja diferente para cada um deles. Na presença e ausência do DNA, o morin-Bi(III) mostrou características espectrais diferentes, o que está de acordo com as observadas para outros intercaladores. Neste trabalho, a interação do complexo morin-Bi(III) com o DNA de timo de vitela foi investigada com o uso do azul de metileno (MB), como uma sonda de corante espectral e aplicação de espectrofotometria UV-Vis, espectroscopia de fluorescência e voltametria cíclica. , enquanto que o morin liga-se por um modelo de não-intercalação.Based on our investigation, although both morin-Bi(III) complex and morin can bind to DNA, the nature of the binding was found to be different for each of them. In the presence and absence of the DNA, the morin-Bi(III) complex shows different spectral characteristics which agree with those observed for other intercalators. In this work, the interaction of morin-Bi(III) complex with calf thymus DNA was investigated with the use of methylene blue (MB) dye as a spectral probe and application of UV-Vis spectrophotometry, fluorescence spectroscopy and cyclic voltammetry. The 2:1 morin-Bi(III) complex ratio was calculated by UV-Vis spectroscopy (mole ratio method). The fluorescence signal of Bi(III)-morin complex is increased with DNA addition whereas the fluorescence signal of Morin is decreased with DNA addition. The fluorescence signal of the DNA-complex is quenched by addition of MB which confirms the displacement of the complex with MB. Cyclic voltammetry studies confirm the intercalation reaction. The results showed that only morin-Bi(III) complex can intercalate into the double helix of the DNA. The apparent binding constant of morin-Bi(III) complex with DNA is found to be 2.8 × 10 4 L mol -1, while morin binds in a non-intercalation mode.

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Section: Introductionmentioning

confidence: 99%

Study on the interaction between morin-bi(III) complex and DNA with the use of methylene blue dye as a fluorophor probe

Ensafi

Hajian

Ebrahimi

2009

J. Braz. Chem. Soc.

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“…The disadvantages of liquid-liquid extraction include the use of large volumes of organic solvents. Nevertheless, several other techniques for pre-concentration of Bi have been proposed, including preconcentration using Mg-W cell electrodeposition, 14 preconcentration with sodium di-n-propyl dithiophosphinate and activated carbon in a batch method, flow injection on-line two stage solvent extraction, 15 flow injection on-line sorption preconcentration 16,17 and solid phase extraction. [18][19][20][21][22] When the micellar solution of a nonionic or weakly polar surfactant is heated, the surfactant changes from water soluble to oil soluble.…”

Section: Introductionmentioning

confidence: 99%

Cloud point extraction spectrophotometric determination of trace quantities of bismuth in urine

Afkhami¹,

Madrakian²,

Siampour³

2006

J. Braz. Chem. Soc.

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Investigamos o processo de extração no ponto-nuvem para bismuto, a partir de soluções aquosas, usando o surfactante não-iônico Triton X-114. O método consiste na reação de complexação do Bi(III) com vermelho de bromopirogalol e extração mediada pelo sistema micelar. As condições ótimas de extração e reação (pH, concentração de reagentes, efeito do tempo de incubação etc.) foram estudadas, e as características analíticas do método (por exemplo, limite de detecção, intervalo de linearidade) foram estabelecidas. Uma resposta linear para o íon Bi(III) foi obtida no intervalo de 4,60-120,0 ng mL -1 . O limite de detecção obtido foi de 2,0 ng mL -1 . O efeito da interferência de alguns ânions e cátions foi também testado. O método foi aplicado para a determinação de bismuto em amostras de urina humana.A cloud point extraction process using the nonionic surfactant Triton X-114 to extract bismuth from aqueous solutions was investigated. The method is based on the complexation reaction of Bi(III) with bromopyrogallol red (BPR) and micelle-mediated extraction of the complex. The optimal extraction and reaction conditions (e.g., pH, reagent concentration, effect of time) were studied, and the analytical characteristics of the method (e.g., limit of detection, linear range) were obtained. Linearity was obeyed in the range of 4.60-120.0 ng mL -1 of Bi(III) ion. The detection limit of the method was 2.0 ng mL -1 of Bi(III) ion. The interference effect of some anions and cations was also tested. The method was applied to the determination of bismuth in human urine sample.

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“…The stock solution of Bi(III) was prepared by dissolving Bi(NO 3 ) 3 .5H 2 O in 0.5 mol dm −3 nitric acid and it was further diluted with distilled water to the concentrations required for experimental use. Immobilized bayberry tannin (0.100 g) was suspended in 100 cm 3 of Bi(III) solutions in which the concentrations of Bi(III) ions were 0.096, 0.191, 0.287, 0.383 and 0.479 mmol dm −3 .…”

Section: Adsorption Isothermsmentioning

confidence: 99%

“…2 It is well known that a number of human diseases have been attributed to the toxic effects of bismuth, such as nephropathy, osteoarthropathy, hepatitis and neuropathology. 3 Therefore, the removal of bismuth from wastewater is essential for the elimination of bismuth contamination.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of bismuth(III) by bayberry tannin immobilized on collagen fiber

Wang

Liao

Zhao

et al. 2006

J of Chemical Tech & Biotech

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The adsorption behavior of collagen fiber-immobilized bayberry tannin towards Bi(III) at acidic pH values was investigated. The adsorption capacity of the adsorbent towards Bi(III) was 0.348 mmol g −1 at 303 K, and increased with the rise in temperature. The adsorption isotherms of Bi(III) were in the shape of so-called type II isotherms and could be described by an empirical equation, ln q e = k + (1/n)C e , which implies that chemical adsorption is predominant at lower concentrations of Bi(III) and that physical adsorption is involved at higher concentrations. The adsorption kinetics of Bi(III) on the immobilized bayberry tannin could be well described by the pseudo-second-order rate model, and the adsorption capacities calculated by the model were almost the same as those determined by actual measurements. The adsorbent could be regenerated by using 0.02 mol dm −3 ethylenediaminetetraacetic acid (EDTA) solution after adsorption of Bi(III). The adsorption selectivity of the immobilized bayberry tannin towards Bi(III) in a Cu(II)-Bi(III) binary solution in acidic medium was remarkable. Therefore, it is strongly suggested that the immobilized bayberry tannin could be applied to the removal of Bi(III) from crude Cu(II) samples under proper conditions.

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Determination of bismuth in environmental samples with Mg–W cell–electrothermal atomic absorption spectrometry

Cited by 37 publications

References 14 publications

Study on the interaction between morin-bi(III) complex and DNA with the use of methylene blue dye as a fluorophor probe

Study on the interaction between morin-bi(III) complex and DNA with the use of methylene blue dye as a fluorophor probe

Cloud point extraction spectrophotometric determination of trace quantities of bismuth in urine

Adsorption of bismuth(III) by bayberry tannin immobilized on collagen fiber

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