TY - JOUR
T1 - Quantification of trace metals in water using complexation and filter concentration
AU - Dolgin, Bella
AU - Bulatov, Valery
AU - Japarov, Julia
AU - Elish, Eyal
AU - Edri, Elad
AU - Schechter, Israel
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2010/6/15
Y1 - 2010/6/15
N2 - Various metals undergo complexation with organic reagents, resulting in colored products. In practice, their molar absorptivities allow for quantification in the ppm range. However, a proper pre-concentration of the colored complex on paper filter lowers the quantification limit to the low ppb range. In this study, several pre-concentration techniques have been examined and compared: filtering the already complexed mixture, complexation on filter, and dipping of dye-covered filter in solution. The best quantification has been based on the ratio of filter reflectance at a certain wavelength to that at zero metal concentration. The studied complex formations (Ni ions with TAN and Cd ions with PAN) involve production of nanoparticle suspensions, which are associated with complicated kinetics. The kinetics of the complexation of Ni ions with TAN has been investigated and optimum timing could be found. Kinetic optimization in regard to some interferences has also been suggested.
AB - Various metals undergo complexation with organic reagents, resulting in colored products. In practice, their molar absorptivities allow for quantification in the ppm range. However, a proper pre-concentration of the colored complex on paper filter lowers the quantification limit to the low ppb range. In this study, several pre-concentration techniques have been examined and compared: filtering the already complexed mixture, complexation on filter, and dipping of dye-covered filter in solution. The best quantification has been based on the ratio of filter reflectance at a certain wavelength to that at zero metal concentration. The studied complex formations (Ni ions with TAN and Cd ions with PAN) involve production of nanoparticle suspensions, which are associated with complicated kinetics. The kinetics of the complexation of Ni ions with TAN has been investigated and optimum timing could be found. Kinetic optimization in regard to some interferences has also been suggested.
KW - Environmental analysis
KW - Heavy metals
KW - Water
UR - http://www.scopus.com/inward/record.url?scp=77952102080&partnerID=8YFLogxK
U2 - 10.1016/j.talanta.2010.02.056
DO - 10.1016/j.talanta.2010.02.056
M3 - 文章
C2 - 20441927
AN - SCOPUS:77952102080
VL - 81
SP - 1482
EP - 1488
JO - Talanta
JF - Talanta
SN - 0039-9140
IS - 4-5
ER -