<b>Comparison of some preconcentration methods for certain metal ions in human milk and yogurts</b>

Abstract

Five samples each of yogurts and human milk were separately collected, deproteinized, pre-concentrated differently with 1% 8-hydroxyquinoline, 1% ammonium pyrrolidine-dithiocarbamate (APDC) and extracted with methyl-isobutylketone (MIBK). Activated carbon powder in HNO 3 was also used. The extracts obtained were analyzed using atomic absorption spectrometry for some metal ions. In yogurts, the powdered activated carbon in HNO 3 exhibited the highest complexing ability with values of 0.

Comparison of Trace Elements in High-Molecular-Mass Multiprotein Complex and in Female Milk from Which It Was Obtained

“…In addition, the relative content of certain metal ions (Ca, Mg, Zn, Fe, Cu, Cr, and Mn) in human milk was previously evaluated using two approaches using 8-hydroxyquinoline (method 1) and ammonium pyrrolidine-dithiocarbamate (method 2) [32] (Table 3). One can see that the relative content of all metals is significantly varied for various milk preparations.…”

“…We compared the data obtained by us with the published results [32, 38] on the evaluation of the content of some metals in human milk (Table 3). Taking into account the essential difference in the content of all elements in different milk preparations, some our data agree to some extent with data of [38], while other with finding of [32]. However, in this article, we estimated the content of the elements only in nine milk preparations that were used to purification of SPC mix .…”

“…Activated carbon powder in HNO 3 was also used. The obtained extracts were analyzed using atomic absorption spectrometry for some metal ions [32].…”

Enrichment/separation of cadmium(II) and lead(II) in environmental samples by solid phase extraction

“…Also lower elements concentrations than the detection limits of the instrumental technique are another problem in the trace heavy metal determinations in environmental samples. Consequently, a preconcentration/separation process is usually required [6][7][8][9][10]. Coprecipitation [11][12][13], membrane filtration [14,15], electrodeposition [16], cloud point extraction [17] and solvent extraction [18][19][20][21] are the popular methods for the preconcentration and separation of the traces transition metal ions.…”

Extraction of Trace Cd(II) in Real Samples using Multi Walled Carbon Nanotubes Carboxylate

“…Also lower elements concentrations than the detection limits of the instrumental technique are another problem in the trace heavy metal determinations in environmental samples. Consequently, a preconcentration/ separation process is usually required [6][7][8][9][10] . Coprecipitation [11][12][13] , membrane filtration 14,15 , electrodeposition 16 , cloud point extraction 17 and solvent extraction [18][19][20][21] are the popular methods for the preconcentration and separation of the traces transition metal ions.…”