Determination of platinum and palladium in environmental samples by graphite furnace atomic absorption spectrometry after separation on dithizone sorbent

Chwastowska, J.; Skwara, W.; Sterlińska, E.; Pszonicki, L.

doi:10.1016/j.talanta.2004.02.009

Cited by 62 publications

(20 citation statements)

References 22 publications

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“…Comparando os valores de limite de detecção obtidos por diferentes técnicas verifica-se, conforme esperado, a baixa sensibilidade obtida na NAA. Isto se deve a problemas de interferências espectrais decorrentes do efeito Compton do 24 Na e da radiação de freiamento do 32 P. Já a ENAA proporciona um aumento da sensibilidade, devido ao alto valor da integral de ressonância do isótopo alvo 108 Pd de 253 barns e baixa seção de choque para nêutrons térmicos de 8,77 barns, e o sódio presente em alto teor na amostra apresenta baixo valor de integral de resso- nância. Fazendo a pré-separação do Pd para posterior ENAA, foi verificado o aumento da sensibilidade em relação aos métodos instrumentais de análise, sendo que a separação por extração em fase sólida foi a que proporcionou menor valor para limite de detecção.…”

Section: Resultsunclassified

“…Na ENAA com a redução do problema de interferênci-as espectrais principalmente da alta atividade do 24 Na e do 32 P, os dados obtidos indicaram uma boa precisão e alta sensibilidade quando comparados com aqueles encontrados na NAA e EDXRF.…”

Section: Conclusõesunclassified

“…Embora a NAA esteja bem estabelecida para determinação de diversos elementos em concentrações traço e ultratraço em diferentes tipos de matrizes, a determinação de Pd em amostras biológicas por este método apresenta o problema de interferências. A alta atividade do 24 Na, formado pela ativação com nêutrons do sódio presente em alto teor na amostra, impede a medição do paládio devido à saturação do detector e, também, o efeito Compton do 24 Na e da radiação de freiamento do 32 8,20,28 e a pré-concentração do Pd em sulfeto de níquel, obtido por meio de ensaio de fogo, seguida de co-precipitação em telúrio metálico. 14,15,29 São apresentados neste trabalho os resultados da determinação de Pd em amostras biológicas e material catalisador automotivo obtidos pelos métodos de ativação instrumental com nêutrons tér-micos e epitérmicos separadamente e pela técnica de fluorescência de raios X por dispersão de energia (EDXRF).…”

Section: Introductionunclassified

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Determinação de paládio em amostras biológicas aplicando técnicas analíticas nucleares

Cavalcante¹,

Sato²,

Salvador³

et al. 2008

Quím. Nova

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Recebido em 9/5/07; aceito em 24/11/07; publicado na web em 8/7/08 DETERMINATION OF PALLADIUM IN BIOLOGICAL SAMPLES APPLYING NUCLEAR ANALYTICAL TECHNIQUES. This study presents Pd determinations in bovine tissue samples containing palladium prepared in the laboratory, and CCQM-P63 automotive catalyst materials of the Proficiency Test, using instrumental thermal and epithermal neutron activation analysis and energy dispersive X-ray fluorescence techniques. Solvent extraction and solid phase extraction procedures were also applied to separate Pd from interfering elements before the irradiation in the nuclear reactor. The results obtained by different techniques were compared against each other to examine sensitivity, precision and accuracy.

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Section: Resultsunclassified

Section: Conclusõesunclassified

Section: Introductionunclassified

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Determinação de paládio em amostras biológicas aplicando técnicas analíticas nucleares

Cavalcante¹,

Sato²,

Salvador³

et al. 2008

Quím. Nova

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“…For this purpose, many enrichment methods have been proposed and used to separate and preconcentrate trace elements, according to nature of the samples, the concentration of the analytes and the measurement techniques [10]. Different methods have been applied to extract Ni(II) and Pd(II) ions in water samples including liquid-liquid extraction [11], cloud point extraction [12][13][14][15][16], coprecipitation [17], ion exchange [18], liquid phase micro extraction [19][20][21], voltammetry [22,23] and solid phase extraction [9,[24][25][26][27][28][29][30][31][32]. The liquid-liquid extraction and separation methods are usually time-consuming and labor extensive, and require relatively large volumes of high purity solvents.…”

Section: Introductionmentioning

confidence: 99%

Removal of nickel(II) and palladium(II) from surface waters

Sabermahani¹,

Saeidi²,

Sharifzade³

2012

Bull. Chem. Soc. Eth.

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ABSTRACT. A new sorbent was prepared using alumina and 5-Br-PADAP, and its adsorption ability for the removal of Ni(II) and Pd(II) from different waters was investigated. The procedure is based on retention of the analytes on the alumina load with 5-Br-PADAP at pH ~ 6. The separation/preconcentration conditions for the quantitative recoveries were investigated. The limit of detections (LOD) based on three times the standard deviations of the blank, were 0.187 and 0.253 ng mL -1 for Ni(II) and Pd(II), respectively. Obtained sorption capacities for 1 g sorbent were 6.0 mg Ni(II) and 11.0 mg Pd(II). The linearity was maintained in the concentration range of 0.625 to 6.0 ng mL -1 for Ni(II) and 0.416 to 7.0 ng mL -1 for Pd(II) in the original solution. Eight replicate determinations of a mixture containing 2.0 µg mL -1 each of the elements in the final solution gave relative standard deviation of ±0.82 and ±1.12% for Ni(II) and Pd(II), respectively. The proposed method was successfully applied to the determination trace amounts of Ni(II) and Pd(II) in the surface water samples.

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“…144 Examples of AAS applications for the determination of noble metals in various objects using the sorption preconcentration are given in Table 1 and in original papers. 23,27,[31][32][33]81,82,[84][85][86][87][88]112,114,122,130,133,134,136,[144][145][146][147][148][149][150] …”

mentioning

confidence: 99%

Trends in Sorption Preconcentration Combined with Noble Metal Determination

2007

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Nowadays much attention is being paid to the determination of trace amounts of noble metals in geological, industrial, biological and environmental samples. The most promising techniques, such as inductively coupled plasma atomic emission spectrometry (ICP-AES), inductively coupled plasma mass spectrometry (ICP-MS) and electrothermal atomic absorption spectrometry (ETAAS) are characterized by high sensitivity. However, the accurate determination of trace noble metals has been limited by numerous interferences generated from the presence of matrix elements. To decrease, or eliminate, these interferences, the sorption preconcentration of noble metals is often used prior to their instrumental detection. A great number of hyphenated methods of noble metal determination using sorption preconcentration have been developed. This review describes the basic types of available sorbents, preconcentration procedures and preparations of the sorbent to the subsequent determination of noble metals. The specific features of instrumental techniques and examples of ETAAS, FAAS, ICP-AES, ICP-MS determinations after the sorption preconcentration of noble metals are considered. The references cited here were selected mostly from the period 1996 -2006.

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Determination of platinum and palladium in environmental samples by graphite furnace atomic absorption spectrometry after separation on dithizone sorbent

Cited by 62 publications

References 22 publications

Determinação de paládio em amostras biológicas aplicando técnicas analíticas nucleares

Determinação de paládio em amostras biológicas aplicando técnicas analíticas nucleares

Removal of nickel(II) and palladium(II) from surface waters

Trends in Sorption Preconcentration Combined with Noble Metal Determination

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