Composition of the surface waxes from bell pepper and eggplant

Bauer, Štefan; Schulte, E.; Thier, Hans‐Peter

doi:10.1007/s00217-004-1046-7

Cited by 38 publications

(42 citation statements)

References 18 publications

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“…Table 3 summarizes the positive assignments verified by mass spectral library (head to tail comparison). A great part of the previously published data (Table 3, marked by *) was in accordance with that reported in the literature [13,14,[20][21][22][40][41][42][43]. The compounds that were not positively assigned were not present in the studied vegetable types, not detected due to the low concentrations in the sample test solutions or not detected due to spectra averaging between the coeluting target and matrix compounds (false negative).…”

Section: Analysis Of the Sample Test Solution Compounds' Ms 2 Spectrasupporting

confidence: 87%

“…Presence of isomeric triterpenoids in plant cuticular waxes renders the determination of triterpenoids even more difficult. Among the separation techniques, thin-layer (TLC) [13][14][15][16], supercritical fluid (SFC) [17], gas (GC) [18][19][20][21][22][23][24] and highperformance liquid (HPLC) [13,14,[23][24][25][26][27][28][29][30][31][32][33] chromatography and capillary electrophoresis (CE) [34] have been used in their analysis. GC is favorable for the separation of positional triterpenoid isomers, and coupled to flame ionizaton (FID) [18,19,[21][22][23][24] and mass spectrometric (MS) detection [18][19][20]22,24] has been widely used for their qualitative [18][19][20]22,24] and quantitative analysis [18,19,[21][22]…”

Section: Introductionmentioning

confidence: 99%

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Analysis of triterpenoids and phytosterols in vegetables by thin-layer chromatography coupled to tandem mass spectrometry

Naumoska

Vovk

2015

Journal of Chromatography A

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Section: Analysis Of the Sample Test Solution Compounds' Ms 2 Spectrasupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Analysis of triterpenoids and phytosterols in vegetables by thin-layer chromatography coupled to tandem mass spectrometry

Naumoska

Vovk

2015

Journal of Chromatography A

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“…Extraction and analytical method development were published in a separate paper (De Rijke et al 2015). The main n-alkanes found in the pepper extracts were n-C 27 , n-C 29 , n-C 31 and n-C 33 , corresponding to earlier findings (Bauer, Schulte, & Thier 2005;Parsons et al 2013).…”

Section: Quantification and D 2 H Analysis Of N-alkanessupporting

confidence: 55%

The use of δ2H and δ18O isotopic analyses combined with chemometrics as a traceability tool for the geographical origin of bell peppers

et al. 2016

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The use of 2H and 18O isotopic analyses combined with chemometrics as a traceability tool for the geographical origin of bell peppers de Rijke, E.; Schoorl, J.C.; Cerli, C.; Vonhof, H.B.; Verdegaal, S.J.A.; Vivó Truyols, G.I.; Lopatka, M.; Dekter, R.; Bakker, D.; Sjerps, M.J.; Ebskamp, M.; de Koster, C.G. Published in: Food Chemistry DOI:10.1016/j.foodchem.2016.01.134 Link to publicationCitation for published version (APA): de Rijke, E., Schoorl, J. C., Cerli, C., Vonhof, H. B., Verdegaal, S. J. A., Vivó-Truyols, G., ... de Koster, C. G. (2016). The use of 2H and 18O isotopic analyses combined with chemometrics as a traceability tool for the geographical origin of bell peppers. Food Chemistry, 204, 122-128. DOI: 10.1016/j.foodchem.2016 General rights It is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. Keywords:Isotope ratio mass spectrometry Gas chromatography Geographic origin Food products authenticity Linear discriminant analysis Likelihood ratio Bell peppers Capsicum annuum a b s t r a c t Two approaches were investigated to discriminate between bell peppers of different geographic origins. Firstly, d 18 O fruit water and corresponding source water were analyzed and correlated to the regional GNIP (Global Network of Isotopes in Precipitation) values. The water and GNIP data showed good correlation with the pepper data, with constant isotope fractionation of about À4. Secondly, compoundspecific stable hydrogen isotope data was used for classification. Using n-alkane fingerprinting data, both linear discriminant analysis (LDA) and a likelihood-based classification, using the kernel-density smoothed data, were developed to discriminate between peppers from different origins. Both methods were evaluated using the d 2 H values and n-alkanes relative composition as variables. Misclassification rates were calculated using a Monte-Carlo 5-fold cross-validation procedure. Comparable overall classification performance was achieved, however, the two methods showed sensitivity to different samples. The combined values of d 2 H IRMS, and complimentary information regarding the relative abundance of four main alkanes in bell pepper fruit water, has proven effective for geographic origin discrimination. Evaluation of the rarity of observing particular ranges for these characteristics coul...

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“…The cuticular components in tobacco leaves are also mostly very long chain n-alkanes, 2-methylalkanes and 3-methylalkanes (Severson et al, 1984). Similar alkanes were found in tomato leaf (Smith et al, 1996) and fruit (Bauer et al, 2004) waxes and in the surface waxes from the skins of bell peppers and aubergines (Bauer et al, 2005). The most common hydrocarbons in plant cuticular waxes are n-alkanes, ranging in carbon number from 21 to 33 (Bianchi, 1995).…”

Section: Alkanesmentioning

confidence: 92%