Determination of iron, cobalt, nickel, manganese, zinc, copper, cadmium and lead in human hair by inductively coupled plasma-atomic emission spectrometry

Rao, K. S. R. Koteswara; Balaji, T.; Rao, T. Prasada; Babu, Y.S.; Naidu, G. R. K.

doi:10.1016/s0584-8547(02)00045-9

Cited by 233 publications

(39 citation statements)

References 19 publications

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“…Modern instrumental methods including spectrometry, inductively coupled plasma mass spectrometry (ICP-MS), inductively coupled plasma optical emission spectrometry (ICP-OES), and atomic absorption spectrometry (AAS), among others, [6][7][8] have been used for determining traces of metal ions in various media. However, direct determination of metal ions at trace levels by flame AAS (FAAS) is limited not only because of insufficient sensitivity, but also by matrix interferences.…”

Section: Introductionmentioning

confidence: 99%

Ultrasound-assisted emulsification solidified floating organic drop microextraction for the determination of trace cadmium in water samples by flame atomic absorption spectrometry

Zhang

Wang

et al. 2011

J. Braz. Chem. Soc.

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Uma técnica de microextração em fase líquida foi desenvolvida para a extração e determinação de quantidades traço de íons cádmio em amostras de água. A emulsificação-microextração assistida por ultrasom através da gota orgânica flutuante solidificada (USAE-SFODME) foi empregada para a extração e a espectrometria de absorção atômica com chama (FAAS) foi empregada para a determinação de Cd. Foram investigados e otimizados os fatores que influenciam na eficiência da técnica de microextração, tais como tipo e volume de solvente, tempo, temperatura, pH, quantidade do agente quelante e efeito da concentração de cloreto de sódio. Usando as condições otimizadas, um fator do enriquecimento de 81,0 foi obtido para um volume de 6,0 mL de amostra de água. A curva analítica de calibração mostrou-se linear no intervalo de 10-450 mg L -1 com um limite de detecção (LOD) igual a 0,66 mg L -1 de Cd. Os desvios padrão relativos (RSD) para dez replicatas de soluções contendo 20 e 300 mg L -1 de Cd foram 3,34% e 2,42%, respectivamente. O método proposto foi avaliado pela determinação de Cd em material de referência certificado de água ou através de experimentos de adição e recuperação.A liquid-phase microextraction technique was developed using ultrasound-assisted emulsification solidified floating organic drop microextraction (USAE-SFODME) combined with flame atomic absorption spectrometry (FAAS) for the extraction and determination of trace cadmium in water samples. Microextraction efficiency factors, such as extraction solvent type and extraction volume, time, temperature, pH, the amount of the chelating agent, and salt effect, were investigated and optimized. Under optimum conditions, an enrichment factor of 81.0 was obtained for 6.0 mL of water sample. The calibration graph was linear in the range of 10-450 mg L -1 with a detection limit of 0.66 mg L -1 . The relative standard deviations (RSD) for ten replicate measurements of 20 and 300 mg L -1 of Cd were 3.34% and 2.42%, respectively. The accuracy of the proposed method was assessed either by determination of Cd in a certified reference material of water or by addition-recovery experiments.

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Section: Introductionmentioning

confidence: 99%

Ultrasound-assisted emulsification solidified floating organic drop microextraction for the determination of trace cadmium in water samples by flame atomic absorption spectrometry

Zhang

Wang

et al. 2011

J. Braz. Chem. Soc.

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“…Standard stock solution of Fe(III) was prepared by dissolving Fe(NO 3 ) 3 •9H 2 O (99.99%, Aldrich Chemicals, USA) in 0.01N HNO 3 . Subsequently, the working standards were made from the stock by appropriate dilutions.…”

Section: Reagents and Solutionsmentioning

confidence: 99%

“…The methods involving ICP-AES [3,4], ICP-MS [5], spectrophotometry [6], ion chromatography [7,8] and HPLC [9] are well known. A disadvantage of these methods is the associated laborious and time consuming sample preparation procedures and the need for prior separation of matrix uranium using solvent extraction or ion exchange before carrying out the measurement.…”

Section: Introductionmentioning

confidence: 99%

Rapid Separation and Quantification of Iron in Uranium Nuclear Matrix by Capillary Zone Electrophoresis (CZE)

Mishra¹,

Das²,

Jeyakumar³

et al. 2011

AJAC

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A method was developed for rapid separation and determination of iron by employing capillary zone electrophoresis (CZE) technique with direct UV detection. Iron could be separated from matrix uranium by direct injection of dissolved sample solution into capillary using a mixture of 10 mM HCl and 65 mM KCl (pH = 2) as background electrolyte (BGE) at an applied voltage of 15 kV. The developed method has a very high tolerance for the matrix element U (100 mg/mL) and as such may not need prior separation of iron from the matrix. Iron could be separated with better than 95% recovery. The method showed a linear calibration over a concentration range 1-50 ppm of Fe(III). The migration times for the iron peak were reproducible within 1% for both pure Fe(III) and in presence of matrix uranium (80 mg/mL). The precision (RSD, n = 22) of peak area obtained for 1 ppm of iron was 3.5%. The limit of detection (LOD) (3) was 0.1 ppm and the absolute LOD was 9 × 10 -14 g considering the sample injection volume of 1.5 nL. The developed method has been validated by separating and determining iron in two certified reference materials of U 3 O 8 . The method was applied for the determination of iron in different uranium based nuclear materials. The CZE method is versatile for routine analysis as it is simple, rapid and has simple sample preparation procedure.

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“…5 Therefore, the development of accurate and rapid determination methods for monitoring the level of cobalt concentration in the environmental samples is necessary and indispensable. Modern instrumental methods including spectrometry, inductively coupled plasma mass spectrometry (ICP-MS), inductively coupled plasma atomic emission spectrometry (ICP-AES), and atomic absorption spectrometry (AAS), etc., [6][7][8] have been used for determining traces of metal ions in various media. Flame atomic absorption spectrometry (FAAS) is especially the most widely used in this group due to its low cost, friendly operation, high sample throughput and good selectivity.…”

Section: Introductionmentioning

confidence: 99%

Development of Dispersive Liquid‐Liquid Microextraction Based on Solidification of Floating Organic Drop for the Determination of Trace Cobalt in Water Samples

Zhang

Wang

et al. 2011

J Chinese Chemical Soc

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A liquid-phase microextraction technique was developed using dispersive liquid-liquid microextraction based on solidification of floating organic drop combined with flame atomic absorption spectrometry, for the extraction and determination of trace amounts of cobalt in water samples. Microextraction efficiency factors, such as the type and volume of extraction and dispersive solvents, pH, extraction time, the chelating agent amount, and ionic strength were investigated and optimized. Under optimum conditions, an enrichment factor of 160 was obtained from 10.0 mL of water sample. The calibration graph was linear in the range of 1.15-110 mg L -1 with a detection limit of 0.35 mg L -1 . The relative standard deviation for ten replicate measurements of 10 and 100 mg L -1 of cobalt were 3.26% and 2.57%, respectively. The proposed method was assessed through the analysis of certified reference water or recovery experiments.

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Determination of iron, cobalt, nickel, manganese, zinc, copper, cadmium and lead in human hair by inductively coupled plasma-atomic emission spectrometry

Cited by 233 publications

References 19 publications

Ultrasound-assisted emulsification solidified floating organic drop microextraction for the determination of trace cadmium in water samples by flame atomic absorption spectrometry

Ultrasound-assisted emulsification solidified floating organic drop microextraction for the determination of trace cadmium in water samples by flame atomic absorption spectrometry

Rapid Separation and Quantification of Iron in Uranium Nuclear Matrix by Capillary Zone Electrophoresis (CZE)

Development of Dispersive Liquid‐Liquid Microextraction Based on Solidification of Floating Organic Drop for the Determination of Trace Cobalt in Water Samples

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