Concentration levels of lead and cadmium in algae of the canary islands littoral

Hardisson, Arturo; Lozano, Gonzalo; Rodríguez, M.Immaculada; Hernández, A. A. Sánchez; Bonis, A. de

doi:10.1016/s0378-4274(96)80288-8

Cited by 5 publications

(4 citation statements)

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“…This value was below the standard (0.1%) specified by the FDA [7]. This value was within the range of 98-262 ppm recorded by Hardisson et al [8] and less than the range of 0.019-0.051% reported by ISO (2004).…”

Section: Resultscontrasting

confidence: 38%

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Parametric Study of Deterioration of Preservatives in Soft Drink

2023

Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.

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Употребление безалкогольных напитков является очень распространенной практикой. В частности, безалкогольные напитки особенно популярны среди детей и подростков. В результате состав напитков должен быть проверен в соответствии с законом. Консерванты в безалкогольных напитках должны определяться во всем мире для обеспечения безопасности и качества продукта. В целях продления срока годности продукта консерванты представляют собой соединения, которые предотвращают, останавливают или задерживают рост микроорганизмов или любую порчу элементов, вызванную бактериями. Целью данного исследования является определение того, как консерванты в безалкогольных напитках портятся на разных этапах их срока годности. Для определения порчи были проанализированы различные физико-химические характеристики и состояние консервантов. Для оценки общей растворимости твердых веществ, объема CO 2 , процентного содержания лимонной кислоты, pH и процентного содержания бензойной кислоты использовались химические методы, такие как дегазация газированных напитков, определение pH, общего количества растворимых твердых веществ, объема газа и бензойной кислоты.

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Section: Resultscontrasting

confidence: 38%

“…This value was below the standard (0.1%) specified by the FDA [7]. This value was within the range of 98-262 ppm recorded by Hardisson et al [8]. Table 6 shows observations of physicochemical characteristics of Mountain Dew (regular) during shelf life of six month.…”

Section: Resultsmentioning

confidence: 48%

Parametric Study of Deterioration of Preservatives in Soft Drink

2023

Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.

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“…Clevenger, Smith, and Winefordner published a 1997 review article that surveys the instrumental techniques used for the quantitation of mercury. 2 The atomic spectroscopic methods used for the determination of mercury include atomic absorption spectroscopy, [3][4][5][6][7][8][9][10] atomic fluorescence spectroscopy, [11][12][13][14][15][16][17] coupled plasma mass spectrometry (ICPMS). [18][19][20][21][22][23][24][25][26][27][28][29][30][31] The ability to monitor isotope ratios using ICPMS advantageously allows for the high accuracy technique of isotope dilution to be implemented.…”

mentioning

confidence: 99%

“…Clevenger, Smith, and Winefordner published a 1997 review article that surveys the instrumental techniques used for the quantitation of mercury . The atomic spectroscopic methods used for the determination of mercury include atomic absorption spectroscopy, − atomic fluorescence spectroscopy, − and inductively coupled plasma mass spectrometry (ICPMS). − The ability to monitor isotope ratios using ICPMS advantageously allows for the high accuracy technique of isotope dilution to be implemented , However, the ID-ICPMS technique employed for mercury in solution can still suffer from long mercury washout times, reduced sensitivity, memory effects, and isotope ratio imprecision.…”

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confidence: 99%

Development of Isotope Dilution Cold Vapor Inductively Coupled Plasma Mass Spectrometry and Its Application to the Certification of Mercury in NIST Standard Reference Materials

et al. 2001

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An isotope dilution cold vapor inductively coupled plasma mass spectrometry (ID-CV-ICPMS) method featuring gaseous introduction of mercury via tin chloride reduction has been developed and applied to the quantification and certification of mercury in various NIST standard reference materials: SRM 966 Toxic Metals in Bovine Blood (30 ng x mL(-1)); SRM 1641d Mercury in Water (1.6 microg x mL(-1)); and SRM 1946 Lake Superior Fish Tissue (436 ng x g(-1)). Complementary mercury data were generated for SRMs and NIST quality control standards using cold vapor atomic absorption spectroscopy (CVAAS). Certification results for the determination of mercury in SRM 1641d using two independent methods (ID-CV-ICPMS and CVAAS) showed a degree of agreement of 0.3% between the methods. Gaseous introduction of mercury into the ICPMS resulted in a single isotope sensitivity of 2 x 10(6) counts x s(-1)/ng x g(-1) for 201Hg and significantly reduced the memory and washout effects traditionally encountered in solution nebulization ICPMS. Figures of merit for isotope ratio accuracy and precision were evaluated at dwell times of 10, 20, 40, 80, and 160 ms using SRM 3133 Mercury Spectrometric Solution. The optimum dwell time of 80 ms yielded a measured 201Hg/202Hg isotope ratio within 0.13% of the theoretical natural value and a measurement precision of 0.34%, on the basis of three replicate injections of SRM 3133.

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Trace elements determination in edible seaweeds by an optimized and validated ICP-MS method

Rocha

Sánchez‐Muniz

Gómez-Juaristi

et al. 2009

Journal of Food Composition and Analysis

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An optimized and validated inductively coupled plasma mass spectrometry (ICP-MS) method was used to analyze trace elements in seaweeds. Different volumes and rates of HNO 3 and H 2 O 2 , digestion times, and microwave power levels were tested to ascertain the best conditions for sample digestion. Analytical mass and instrumental parameters were selected to assure accurate and precise determination of As, Cd, Co, Cr, Mo, Ni, Pb, Sb, Se, and V by ICP-MS. The method was optimized and validated using biological Certified Reference Materials. In addition, some samples of seaweeds (Porphyra and Laminaria) from France, Spain, Korea, and Japan were analyzed using the optimized method. Porphyra presented higher concentrations of most elements, except for As, than Laminaria. Seaweeds from Korea and Japan tended to display the highest concentrations of Pb and Cd. In contrast, Spanish and French samples showed the highest levels of some micro-elements essential to human nutrition.

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Concentration levels of lead and cadmium in algae of the canary islands littoral

Cited by 5 publications

References 0 publications

Parametric Study of Deterioration of Preservatives in Soft Drink

Parametric Study of Deterioration of Preservatives in Soft Drink

Development of Isotope Dilution Cold Vapor Inductively Coupled Plasma Mass Spectrometry and Its Application to the Certification of Mercury in NIST Standard Reference Materials

Trace elements determination in edible seaweeds by an optimized and validated ICP-MS method

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