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Binding of mineral elements by some dietary fibre components-in vitro (I)

Nair, Baboo M. LU ; Asp, Nils Georg LU ; Nyman, Margareta LU and Persson, Hans (1987) In Food Chemistry 23(4). p.295-303
Abstract

The binding of copper, cadmium and zinc ions to some soluble and gelforming types of dietary fibre (guar gum, low and high methoxylated pectin and sterculia gum) has been investigated potentiometrically. Considerable binding was found to low methoxylated pectin, but the binding to sterculia gum and high methoxylated pectin was less pronounced. The binding to guar gum was negligible. Thus, the formation of complexes seemed to be due to the proportion of free carboxyl groups. The amount of added metal bound to sterculia gum was proportional to the fibre concentration, whereas the pectins showed increased binding at higher fibre concentrations. This was possibly due to intermolecular interactions between the polymers and metal ions. The... (More)

The binding of copper, cadmium and zinc ions to some soluble and gelforming types of dietary fibre (guar gum, low and high methoxylated pectin and sterculia gum) has been investigated potentiometrically. Considerable binding was found to low methoxylated pectin, but the binding to sterculia gum and high methoxylated pectin was less pronounced. The binding to guar gum was negligible. Thus, the formation of complexes seemed to be due to the proportion of free carboxyl groups. The amount of added metal bound to sterculia gum was proportional to the fibre concentration, whereas the pectins showed increased binding at higher fibre concentrations. This was possibly due to intermolecular interactions between the polymers and metal ions. The order of complex formation ability to the fibres investigated was different for different metals. To low methoxylated pectin the order Cu>Zn ≫ Cd was observed.

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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Food Chemistry
volume
23
issue
4
pages
9 pages
publisher
Elsevier
external identifiers
  • scopus:0023122408
ISSN
0308-8146
DOI
10.1016/0308-8146(87)90115-4
language
English
LU publication?
yes
id
ead59760-d065-4d33-ad97-22db5cdc79a9
date added to LUP
2018-10-16 19:52:14
date last changed
2023-09-08 09:08:47
@article{ead59760-d065-4d33-ad97-22db5cdc79a9,
  abstract     = {{<p>The binding of copper, cadmium and zinc ions to some soluble and gelforming types of dietary fibre (guar gum, low and high methoxylated pectin and sterculia gum) has been investigated potentiometrically. Considerable binding was found to low methoxylated pectin, but the binding to sterculia gum and high methoxylated pectin was less pronounced. The binding to guar gum was negligible. Thus, the formation of complexes seemed to be due to the proportion of free carboxyl groups. The amount of added metal bound to sterculia gum was proportional to the fibre concentration, whereas the pectins showed increased binding at higher fibre concentrations. This was possibly due to intermolecular interactions between the polymers and metal ions. The order of complex formation ability to the fibres investigated was different for different metals. To low methoxylated pectin the order Cu&gt;Zn ≫ Cd was observed.</p>}},
  author       = {{Nair, Baboo M. and Asp, Nils Georg and Nyman, Margareta and Persson, Hans}},
  issn         = {{0308-8146}},
  language     = {{eng}},
  month        = {{01}},
  number       = {{4}},
  pages        = {{295--303}},
  publisher    = {{Elsevier}},
  series       = {{Food Chemistry}},
  title        = {{Binding of mineral elements by some dietary fibre components-in vitro (I)}},
  url          = {{http://dx.doi.org/10.1016/0308-8146(87)90115-4}},
  doi          = {{10.1016/0308-8146(87)90115-4}},
  volume       = {{23}},
  year         = {{1987}},
}