Rapid and Simultaneous Determination of Essential Minerals and Trace Elements in Human Milk by Improved Flame Atomic Absorption Spectroscopy (FAAS) with Microwave Digestion

Luo, Yang; Zhang, Bo; Ming, Chen; Wang, Jue; Xue, Zheng; Gao, Weiyin; Huang, Junlan; Fu, Weiling

doi:10.1021/jf100940e

Cited by 26 publications

(12 citation statements)

References 30 publications

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“…8,37,38 The effect of phenylalanine, DL-leucine, L-glutamate, Mg 2+ , galactose, glucose, lysine, urea, cysteine and sulfanilic acid bearing a similar molecular structure to melamine for the melamine detection was investigated by the naked-eye and the UV-Vis spectrum. As shown in Fig.…”

Section: Selectivity Of the Optical Sensormentioning

confidence: 99%

One-step synthesis of silver/dopamine nanoparticles and visual detection of melamine in raw milk

Niu

Zhang

et al. 2011

Analyst

142

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In this work, we propose a simple, sensitive and reliable assay for melamine in raw milk with dopaminestabilized silver nanoparticles (AgNPs) as a colorimetric reader. Dopamine can reduce Ag + and functionalize the produced AgNPs to form monodispersed AgNPs. The coexisting melamine in reaction solution could bind dopamine through Michael addition and Schiff base reactions, which leads to the aggregation of AgNPs and induces a colorimetric response. The one-step assay is simple, rapid and highly sensitive. The color-change is quantitatively correlated with the concentration of melamine in the range of 10 ppb to 1.26 ppm, which is below the safety limit in China (1.0 ppm) and EU (2.0 ppm). The coexisting substances including phenylalanine, DL-leucine, L-glutamate, sulfanilic acid, Mg 2+ , galactose, lysine, urea and glucose do not affect the determination of melamine. The colorimetric sensor can be used for rapid monitoring of raw milk quality.

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Section: Selectivity Of the Optical Sensormentioning

confidence: 99%

One-step synthesis of silver/dopamine nanoparticles and visual detection of melamine in raw milk

Niu

Zhang

et al. 2011

Analyst

142

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“…Several procedures of sample preparation have already used to reduce these interfering, and most of them involve a step of digestion to eliminate the organic matrix [23,24]. In this study, a simple dilution of the milk in water was tested and results obtained were compared with the standard additions.…”

Section: Matrix Interferencesmentioning

confidence: 99%

Study of Calcium and Sodium Behavior to Identify Milk Adulteration Using Flame Atomic Absorption Spectrometry

Santos¹,

Costa²,

Pereira-Filho

2012

FNS

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A fast and direct method for determination of milk adulteration by monitoring of calcium and sodium concentrations variations was described. Milk samples were furnished by a dairy company located at São Carlos (São Paulo State, Brazil) and spiked with tap-water, whey, hydrogen peroxide, synthetic urine, urea and synthetic milk in the ranged from 5% to 50% (v/v), expect for caustic soda. Caustic soda was added in the milk until establish the original pH. The milk samples were analyzed by using flame atomic absorption spectrometry (FAAS) and no acid digestion process was required. Results showed a significant decrease in the Na and Ca concentrations with addition of synthetic milk and tap-water, a nonlinear variation with addition of synthetic urine, whey and hydrogen peroxide and a largest increase in the Na concentration with addition of NaOH. Correlation between Na and Ca concentrations in pure and adulterated milk were evaluated by paired t-test at a 95% confidence level. Results showed that the method proposed is efficient to identify samples adulterated with tap-water, caustic soda, synthetics milk and urine.

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“…3 Recent studies have reported the use of alternative techniques for milk sample preparation and the determination of elements by spectroanalytical techniques. Luo et al 4 have worked in the determination of essential and trace elements by FAAS and ICP-OES in human milk with microwaveassisted digestion. Bizzi et al 5 have reported the use of dilute nitric acid for complete decomposition of powdered whole milk and non-fat milk in a microwave oven using oxygen-pressurized vials; low residual carbon content and good recoveries of the elements were obtained.…”

Section: Introductionmentioning

confidence: 99%

Infrared Radiation Applied as a Heating Source in Milk Sample Preparation for the Determination of Trace Elements by Inductively Coupled Plasma-Optical Emission Spectroscopy

Sousa¹,

Silva²,

Gouveia³

et al. 2017

Rev. Virtual Quim.

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Resumo: O uso da radiação infravermelha (IR) como fonte de aquecimento no preparo de amostra de leite e análise de elementos traços por espectrometria de emissão óptica com plasma acoplado indutivamente (ICP-OES) foi investigado. Três estratégias foram estudadas: 1) um sistema que combina a radiação IR e radiação micro-ondas (IR-MW); 2) a digestão parcial utilizando apenas radiação IR; e 3) a digestão parcial utilizando a radiação IR e o pentóxido de vanádio (V 2 O 5 ) como catalisador (IR-V 2 O 5 ). Precisão e exatidão variaram de acordo com o elemento determinado. O procedimento utilizando somente radiação IR apresentou 15,1 ± 0,3 mg g -1 para Ca, 0,76 ± 0,03 µg g -1 para Cu, 217 ± 2 µg g -1 para Fe, 14,8 ± 0,7 mg g -1 para K, 1,17 ± 0,03 mg g -1 para Mg, 4,41 ± 0,08 mg g -1 para Na, 16,2 ± 0,1 mg g -1 para P e 30,5 ± 0,6 µg g -1 para Zn em amostras de leite desnatado. O uso da radiação IR para o preparo de amostras em análise de elementos traços é uma alternativa fácil de ser implementada e de baixo custo para laboratórios de análise de alimentos que não possuam forno de micro-ondas disponível. Palavras-chave: Radiação infravermelha; leite; pentóxido de vanádio; elementos traços; ICP-OES. AbstractThe use of infrared (IR) radiation as a heating source for milk sample preparation in trace element analysis by inductively coupled plasma optical emission spectroscopy (ICP-OES) was investigated. Three strategies were studied: 1) a system that combined IR and microwave radiation (IR-MW); 2) partial digestion using only IR radiation (IR); and 3) partial digestion using IR radiation and vanadium pentoxide as a catalyst (IR-V 2 O 5 ). Accuracy varied according to the element determined. The procedure using only IR radiation presented 15.1 ± 0.3 mg g -1 for Ca, 0.76 ± 0.03 µg g -1 for Cu, 217 ± 2 µg g -1 for Fe, 14.8 ± 0.7 mg g -1 for K, 1.17 ± 0.03 mg g -1 for Mg, 4.41 ± 0.08 mg g -1 for Na, 16.2 ± 0.1 mg g -1 for P and 30.5 ± 0.6 µg g -1 for Zn in non-fat milk. The use of IR radiation for sample preparation in trace element analysis is an easy to implement and a low-cost alternative for laboratories of food analysis that do not have a microwave available.

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Rapid and Simultaneous Determination of Essential Minerals and Trace Elements in Human Milk by Improved Flame Atomic Absorption Spectroscopy (FAAS) with Microwave Digestion

Cited by 26 publications

References 30 publications

One-step synthesis of silver/dopamine nanoparticles and visual detection of melamine in raw milk

One-step synthesis of silver/dopamine nanoparticles and visual detection of melamine in raw milk

Study of Calcium and Sodium Behavior to Identify Milk Adulteration Using Flame Atomic Absorption Spectrometry

Infrared Radiation Applied as a Heating Source in Milk Sample Preparation for the Determination of Trace Elements by Inductively Coupled Plasma-Optical Emission Spectroscopy

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