کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1218767 | 967624 | 2010 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Water-soluble Cu, Fe, Mn and Zn species in nuts and seeds Water-soluble Cu, Fe, Mn and Zn species in nuts and seeds](/preview/png/1218767.png)
An approach was developed to estimate molecular weight distribution of water-soluble Cu, Fe, Mn and Zn species in Brazil nut, cupuassu seed and coconut pulp by size exclusion chromatography (SEC) coupled on-line to ultra-violet (UV) and off-line to graphite furnace atomic absorption spectrometry (GF-AAS) detectors and matrix-assisted laser desorption ionisation time-of-flight mass spectrometry (MALDI-TOF-MS). SEC-UV analytical signals showed the prevalence of high molecular weight (HMW) species (79–1.7 kDa for Brazil nut, 50–1.7 kDa for coconut pulp, and 34–1.7 kDa for cupuassu seeds). The Brazil nut SEC-UV, GF-AAS and MALDI-TOF mass spectra gave confirmation of the association of the elements with water-soluble compounds. The elemental profiles were associated with fractions of compounds of molecular weight 1.2–16 kDa for Brazil nut, 1.7–13 kDa for coconut pulp, and 1.2–7.6 kDa for cupuassu seeds.
Journal: Journal of Food Composition and Analysis - Volume 23, Issue 1, February 2010, Pages 78–85