Direct determination of cadmium in Orujo spirit samples by electrothermal atomic absorption spectrometry: Comparative study of different chemical modifiers

Fariñas, M. Vilar; García, Julia Barciela; Martín, S. García; Crecente, R.M. Peña; Herrero-Latorre, Carlos

doi:10.1016/j.aca.2007.03.062

Cited by 18 publications

(15 citation statements)

References 22 publications

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“…Concentrations of individual elements are quite often measured in distilled spirits using graphite-furnace atomic absorption spectrometry (GF-AAS) with graphite tubes and integrated or inserted L'vov platforms [1,4,6,11,17,19,34,37,38,45,[49][50][51][52]. Graphite tubes without platforms are rarely used [18,31,45].…”

Section: Methods Of Choice For Elemental Analysis Of Spirit Productsmentioning

confidence: 99%

“…Graphite tubes without platforms are rarely used [18,31,45]. GF-AAS is applied to determine a specific group of trace elements {i.e., Al [17,19,34,46], As [1,6,19,37], Cd [11,17,19,20,38,45,46,49,50], Cr [11,18,31,45], Cu [1,6,9,37,50], Fe [52], Ni [9,11,31,45], Pb [1,4,6,9,14,16,17,19,33,37,46,[49][50][51] and Sb [18]}. However, it can also be used for determining selected major and minor elements (i.e., Zn, Fe, Ca, Mg and Na) …”

Section: Methods Of Choice For Elemental Analysis Of Spirit Productsmentioning

confidence: 99%

“…Parameters of GF temperature programs (i.e., drying, pyrolysis and atomization temperatures) and types and amounts of chemical modifiers are in most cases optimized to select compromise conditions providing the best reproducibility of analyte responses, the lowest limits of detection (LODs) and well-defined atomic absorption peaks. Carefully optimized operating conditions also enable removal of the majority of organic components of distilled spirits and prevent analytes from volatilization before the atomization stage [1,4,6,17,18,20,31,37,38,49,50]. GF-AAS is particularly advantageous for direct analysis of distilled spirits with minimal sample preparation [6].…”

Section: Methods Of Choice For Elemental Analysis Of Spirit Productsmentioning

confidence: 99%

“…Accordingly, permissible levels of selected trace elements in these products are given as the following: 10 mg L -1 , 10 mg L -1 , 0.5 mg L -1 and 2 mg L -1 , respectively for As, Cu, Pb and Zn [25] in Serbia, 0.1 mg L -1 , 5 mg L -1 and 0.2 mg L -1 , respectively for As, Cu and Pb [1,3,[6][7][8]16,29,33,36] in Brazil, 10 mg L -1 , 1 mg L -1 and 10 mg L -1 , respectively for Cu, Pb and Zn, [2,5,14] in Spain, and 4 mg L -1 and 2 mg L -1 , respectively for Cu and Fe [13,27] in Venezuela. Apart from verification of the quality and the safety of distilled spirits, their reliable elemental analysis is important from a marketing point of view {i.e., to guarantee the products are genuine and of superior quality, particularly when these products are declared as possessing a certified brand of origin (CBO) label [1,2,6,7,31,37,38]. …”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Advances in assessing the elemental composition of distilled spirits using atomic spectrometry

Szymczycha‐Madeja

Wełna

Jamróz

et al. 2015

TrAC Trends in Analytical Chemistry

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Section: Methods Of Choice For Elemental Analysis Of Spirit Productsmentioning

confidence: 99%

Section: Methods Of Choice For Elemental Analysis Of Spirit Productsmentioning

confidence: 99%

Section: Methods Of Choice For Elemental Analysis Of Spirit Productsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Advances in assessing the elemental composition of distilled spirits using atomic spectrometry

Szymczycha‐Madeja

Wełna

Jamróz

et al. 2015

TrAC Trends in Analytical Chemistry

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“…The modifiers usually act stabilizing thermally the analytes, allowing higher pyrolysis temperature and better matrix elimination. [40][41][42][43] The objective of this work consist in the study of modifiers in solution and also as permanent modifiers and calibration techniques for the development of a method for the determination of Cd, Pb and Tl in biodiesel. The feasibility of using a simple treatment, consisting of the formation of a biodiesel microemulsion, will be investigated.…”

Section: Introductionmentioning

confidence: 99%

Calibration techniques and modifiers for the determination of Cd, Pb and Tl in biodiesel as microemulsion by graphite furnace atomic absorption spectrometry

Silva¹,

Chaves²,

Santos³

et al. 2010

J. Braz. Chem. Soc.

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Diferentes calibrações e modificadores foram testados para a determinação de Cd, Pb e Tl em biodiesel por espectrometria de absorção atômica em forno de grafite (GF AAS). Foram preparadas microemulsões usando-se 2 g de biodiesel, 1 mL de solução aquosa de ácido nítrico 10% (v/v) e n-propanol até o volume final de 10 mL. As temperaturas de pirólise foram: 600 °C para Cd e Tl com Pd como modificador permanente e 800 °C para Pb com Ru como modificador permanente. As temperaturas de atomização também foram otimizadas. A calibração aquosa não corrigiu as interferências não espectrais, mas a calibração com simulação de matriz produziu resultados exatos com recuperações entre 80 e 116%. Os valores de RSD foram menores do que 8% para e Cd e Pb com valores de LOD de 0,5 ng g -1 para Cd, 6 ng g -1 para Pb e 1 ng g -1 para Tl. Os resultados obtidos usando-se calibração pelo método de adições de analito e por simulação de matriz foram concordantes. Padrões organometálicos não foram necessários. Diferentes amostras de biodiesel foram analisadas.Different calibration approaches and modifiers were tested for Cd, Pb and Tl determination in biodiesel by graphite furnace atomic absorption spectrometry (GF AAS). Microemulsions were prepared by mixing 2 g of biodiesel, 1 mL of a 10% (v/v) nitric acid aqueous solution and n-propanol to a 10 mL final volume. Pyrolysis temperatures of 600 °C for Cd and Tl with Pd as permanent modifier, and 800 °C for Pb with Ru as permanent modifier were used. Atomization temperatures were also optimized. Calibration solution prepared in aqueous medium did not correct non-spectral interferences, but matrix matching calibration using base oil led to accurate results with recoveries from 80 to 116%. The RSD values were lower than 8% for Cd and Pb and the LOD values were 0.5 ng g -1 for Cd, 6 ng g -1 for Pb and 1 ng g -1 for Tl. The obtained results using the analyte additions method or by matrix matching calibration were in agreement, confirming the accuracy of the proposed procedure. Organometallic standards were not required and different samples were analyzed.

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Comparison of several chemometric techniques for the classification of orujo distillate alcoholic samples from Galicia (northwest Spain) according to their certified brand of origin

et al. 2010

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This paper has a double objective. The first goal was to develop an authentication system to differentiate between traditional orujo alcoholic distillates with and without a certified brand of origin (CBO). Owing to their low price and quality, samples without a CBO can be used as substrates for falsification of genuine CBO ones. The second objective was to perform a comparison of the abilities of the different chemometric procedures employed for this classification. The classification was performed on the basis of the chemical information contained in the metal composition of the orujo distillates. Eight metals determined by electrothermal atomic absorption spectrometry and inductively coupled plasma optical emission spectrometry were considered (Ca, Cd, Cr, Cu, K, Mg, Na and Ni). After the appropriate pretreatment, the data were processed using different chemometric techniques. In the first stage, principal component analysis and cluster analysis were employed to reveal the latent structure contained in the data. Once it had been demonstrated that a relation exists between the metal composition and the raw materials, and not between the metal composition and the distillation systems employed for the orujo production, the second step consisted in the comparative application of different supervised pattern recognition procedures (such as linear discriminant analysis, K-nearest neighbours, soft independent modelling of class analogy, UNEQ and different artificial neural network approaches, including multilayer feed-forward, support vector machines, learning vector quantization and probabilistic neural networks). The results showed the different capabilities of the diverse classification techniques to discriminate between Galician orujo samples. The best results were those provided by probabilistic neural networks, in which the correct recognition abilities for CBO classes and without CBO classes were 98.6 +/- 3.1 and 98.0 +/- 4.5%; the prediction results were 87.7 +/- 3.3 and 86.2 +/- 5.0%, respectively. The usefulness of chemical metal analysis in combination with chemometric techniques to develop a classification procedure to authenticate Galician CBO orujo samples is demonstrated.

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Direct determination of cadmium in Orujo spirit samples by electrothermal atomic absorption spectrometry: Comparative study of different chemical modifiers

Cited by 18 publications

References 22 publications

Advances in assessing the elemental composition of distilled spirits using atomic spectrometry

Advances in assessing the elemental composition of distilled spirits using atomic spectrometry

Calibration techniques and modifiers for the determination of Cd, Pb and Tl in biodiesel as microemulsion by graphite furnace atomic absorption spectrometry

Comparison of several chemometric techniques for the classification of orujo distillate alcoholic samples from Galicia (northwest Spain) according to their certified brand of origin

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