This book contains information obtained from authentic and highly regarded sources. Reasonable ef... more This book contains information obtained from authentic and highly regarded sources. Reasonable efforts have been made to publish reliable data and information, but the authors, editors and publishers cannot assume responsibility for the validity of all materials or the consequences of their use. The authors and editors have attempted to trace the copyright holders of all material reproduced in this publication and apologise to copyright holders if permission to publish in this form has not been obtained. If any copyright material has not been acknowledged, please write and let us know so we may rectify in any future reprint.
s of “ChimAlSi_2012” IX° Italian Congress of Food Chemistry. “Food, Functional Foods and Nutraceu... more s of “ChimAlSi_2012” IX° Italian Congress of Food Chemistry. “Food, Functional Foods and Nutraceuticals” Hotel Continental Terme, Ischia (NA), Italy, June 03-07, 2012
The carbon stable isotope ratio (δ13C) is a valuable chemical parameter in the investigation of t... more The carbon stable isotope ratio (δ13C) is a valuable chemical parameter in the investigation of the geographic origin, quality, and authenticity of foods. The aim of this study is the evaluation of the feasibility of 13C-NMR (Nuclear Magnetic Resonance) spectroscopy to determine the carbon stable isotope ratio, at natural abundance, of small organic molecules, such as vanillin, without the use of IRMS (Isotope Ratio Mass Spectrometry). The determination of vanillin origin is an active task of research, and differentiating between its natural and artificial forms is important to guarantee the quality of food products. To reach our goal, nine vanillin samples were analyzed using both 13C quantitative NMR spectroscopy (under optimized experimental conditions) and IRMS, and the obtained δ13C values were compared using statistical analysis (linear regression, Bland–Altman plot, and ANOVA (analysis of variance)). The results of our study show that 13C-NMR spectroscopy can be used as a val...
White truffle (Tuber magnatum Pico) is a typical product of some Italian regions, and due to its ... more White truffle (Tuber magnatum Pico) is a typical product of some Italian regions, and due to its organoleptic properties it is of high economic value. To date, there is no available information, on the elemental and isotopic composition of this product. For the first time the characteristic value ranges of the stable isotope ratios of the bio-elements as a whole (δ13C, δ15N, δ18O and δ34S) and of the concentration of some macro- and micro-elements (Ag, Al, B, Ba, Ca, Cd, Cr, Cu, Fe, K, Li, Mg, Mn, Na, Ni, Pb, Sr, Zn) are now available, determined in white truffles produced in different areas of Italy (Toscana, Molise, Marche, Piemonte - Langhe, Monferrato-) and in Croatia. All the samples analysed showed values for the toxic, potentially toxic or allergenic elements lower than the legal limits. Furthermore, the ranges of variability of some elements or elements ratios (i.e. Na, B, Mg/Ca, Ba/Ca, Sr/Ca, Li/Fe, B/Al, Ba/Al) and stable isotope ratios (δ34S and δ18O) seem to be different according to the geographical origin. Therefore, the results of this first exploratory work highlight the possibility of characterising white truffles of different provenance, and suggest widening the scope of the survey throughout Italy and foreign regions.
An international project developed, quality-tested, and measured isotope-delta values of 10 new f... more An international project developed, quality-tested, and measured isotope-delta values of 10 new food matrix reference materials (RMs) for hydrogen, carbon, nitrogen, oxygen, and sulfur stable isotope-ratio measurements to support food authenticity testing and food provenance verification. These new RMs, USGS82 to USGS91, will enable users to normalize measurements of samples to isotope-delta scales. The RMs include (i) two honeys from Canada and tropical Vietnam, (ii) two flours from C3 (rice) and C4 (millet) plants, (iii) four vegetable oils from C3 (olive, peanut) and C4 (corn) plants, and (iv) two collagen powders from marine fish and terrestrial mammal origins. An errors-in-variables regression model included the uncertainty associated with the measured and assigned values of the RMs and was applied centrally to normalize results and obtain consensus values and measurement uncertainties. Utilization of these new RMs should facilitate mutual compatibility of stable isotope data if accepted normalization procedures are applied and documented.
Rapid communications in mass spectrometry : RCM, Jan 20, 2017
No study has investigated the variations of stable isotope ratios (SIRs) of bioelements within a ... more No study has investigated the variations of stable isotope ratios (SIRs) of bioelements within a Protected Designations of Origin (PDO) cheese and few studies have focused on the dietary background of animals. For traceability purposes, it is important to know how and whether these issues affect SIRs in a PDO cheese. Thirty-six Pecorino Siciliano cheese samples were collected in three east-Sicilian areas in seasons in which green herbage was present or absent in an animal's diet. The determination of C, N and S SIRs was performed using an isotope ratio mass spectrometer coupled with an elemental analyser. The H and O SIRs were measured using an isotope ratio mass spectrometer equipped with a thermal conversion elemental analyzer pyrolysis unit. The C, N, H, O and S SIRs measured in defatted cheeses were subjected to a multivariate stepwise discriminant analysis to verify if cheeses could be distinguished based on their geographical origin and on the animals" feeding regimen...
This book contains information obtained from authentic and highly regarded sources. Reasonable ef... more This book contains information obtained from authentic and highly regarded sources. Reasonable efforts have been made to publish reliable data and information, but the authors, editors and publishers cannot assume responsibility for the validity of all materials or the consequences of their use. The authors and editors have attempted to trace the copyright holders of all material reproduced in this publication and apologise to copyright holders if permission to publish in this form has not been obtained. If any copyright material has not been acknowledged, please write and let us know so we may rectify in any future reprint.
s of “ChimAlSi_2012” IX° Italian Congress of Food Chemistry. “Food, Functional Foods and Nutraceu... more s of “ChimAlSi_2012” IX° Italian Congress of Food Chemistry. “Food, Functional Foods and Nutraceuticals” Hotel Continental Terme, Ischia (NA), Italy, June 03-07, 2012
The carbon stable isotope ratio (δ13C) is a valuable chemical parameter in the investigation of t... more The carbon stable isotope ratio (δ13C) is a valuable chemical parameter in the investigation of the geographic origin, quality, and authenticity of foods. The aim of this study is the evaluation of the feasibility of 13C-NMR (Nuclear Magnetic Resonance) spectroscopy to determine the carbon stable isotope ratio, at natural abundance, of small organic molecules, such as vanillin, without the use of IRMS (Isotope Ratio Mass Spectrometry). The determination of vanillin origin is an active task of research, and differentiating between its natural and artificial forms is important to guarantee the quality of food products. To reach our goal, nine vanillin samples were analyzed using both 13C quantitative NMR spectroscopy (under optimized experimental conditions) and IRMS, and the obtained δ13C values were compared using statistical analysis (linear regression, Bland–Altman plot, and ANOVA (analysis of variance)). The results of our study show that 13C-NMR spectroscopy can be used as a val...
White truffle (Tuber magnatum Pico) is a typical product of some Italian regions, and due to its ... more White truffle (Tuber magnatum Pico) is a typical product of some Italian regions, and due to its organoleptic properties it is of high economic value. To date, there is no available information, on the elemental and isotopic composition of this product. For the first time the characteristic value ranges of the stable isotope ratios of the bio-elements as a whole (δ13C, δ15N, δ18O and δ34S) and of the concentration of some macro- and micro-elements (Ag, Al, B, Ba, Ca, Cd, Cr, Cu, Fe, K, Li, Mg, Mn, Na, Ni, Pb, Sr, Zn) are now available, determined in white truffles produced in different areas of Italy (Toscana, Molise, Marche, Piemonte - Langhe, Monferrato-) and in Croatia. All the samples analysed showed values for the toxic, potentially toxic or allergenic elements lower than the legal limits. Furthermore, the ranges of variability of some elements or elements ratios (i.e. Na, B, Mg/Ca, Ba/Ca, Sr/Ca, Li/Fe, B/Al, Ba/Al) and stable isotope ratios (δ34S and δ18O) seem to be different according to the geographical origin. Therefore, the results of this first exploratory work highlight the possibility of characterising white truffles of different provenance, and suggest widening the scope of the survey throughout Italy and foreign regions.
An international project developed, quality-tested, and measured isotope-delta values of 10 new f... more An international project developed, quality-tested, and measured isotope-delta values of 10 new food matrix reference materials (RMs) for hydrogen, carbon, nitrogen, oxygen, and sulfur stable isotope-ratio measurements to support food authenticity testing and food provenance verification. These new RMs, USGS82 to USGS91, will enable users to normalize measurements of samples to isotope-delta scales. The RMs include (i) two honeys from Canada and tropical Vietnam, (ii) two flours from C3 (rice) and C4 (millet) plants, (iii) four vegetable oils from C3 (olive, peanut) and C4 (corn) plants, and (iv) two collagen powders from marine fish and terrestrial mammal origins. An errors-in-variables regression model included the uncertainty associated with the measured and assigned values of the RMs and was applied centrally to normalize results and obtain consensus values and measurement uncertainties. Utilization of these new RMs should facilitate mutual compatibility of stable isotope data if accepted normalization procedures are applied and documented.
Rapid communications in mass spectrometry : RCM, Jan 20, 2017
No study has investigated the variations of stable isotope ratios (SIRs) of bioelements within a ... more No study has investigated the variations of stable isotope ratios (SIRs) of bioelements within a Protected Designations of Origin (PDO) cheese and few studies have focused on the dietary background of animals. For traceability purposes, it is important to know how and whether these issues affect SIRs in a PDO cheese. Thirty-six Pecorino Siciliano cheese samples were collected in three east-Sicilian areas in seasons in which green herbage was present or absent in an animal's diet. The determination of C, N and S SIRs was performed using an isotope ratio mass spectrometer coupled with an elemental analyser. The H and O SIRs were measured using an isotope ratio mass spectrometer equipped with a thermal conversion elemental analyzer pyrolysis unit. The C, N, H, O and S SIRs measured in defatted cheeses were subjected to a multivariate stepwise discriminant analysis to verify if cheeses could be distinguished based on their geographical origin and on the animals" feeding regimen...
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