Research Article
Spectrophotometric Determination of Iron(II) after Solid Phase Extraction of Its 2,2′ Bipyridine Complex on Silica Gel-Polyethylene Glycol
Figure 3
Effect of 2,2′ bipyridine concentrations on the absorbance of 50 ng mL−1 iron(II) as 2,2′ bipyridine complex after desorption from the column.
