Research Article

Selective Extraction and Determination of Chromium Concentration Using Luffa cylindrica Fibers as Sorbent and Detection by FAAS

Table 1

Tested conditions for Cr(III) adsorption in the study of multivariate optimization using SPE with a Luffa cylindrica fibers column and detection by FAAS.

Adsorbent mass (mg)Sample flow rate (mL·min−1)Eluent concentration (mol·L−1)Eluent volume (µL)Integrated absorbance

5020.51000.013
10020.51000.024
5040.51000.012
10040.51000.016
5021.01000.018
10021.01000.023
5041.01000.015
10041.01000.025
5020.510000.015
10020.510000.020
5040.510000.024
10040.510000.026
021.010000.022
10021.010000.030
5041.010000.025
10041.010000.026