Health & Environmental Research Online (HERO)


Print Feedback Export to File
6615172 
Journal Article 
Determination of dissolved iron(II) and iron(III) in water with 5-Br-PAN-S by solid phase spectrophotometry 
Chen, , JR; Lin, JJ; , 
2001 
Yes 
Analytical Letters
ISSN: 0003-2719
EISSN: 1532-236X 
MARCEL DEKKER INC 
NEW YORK 
34 
12 
2169-2178 
English 
WOS:000171530100015 
A very sensitive and selective method for the determination of trace amounts of iron(II) and iron(III) by SPS has been developed. It is based on the fixation of iron(II) as 1-(5-bromo-2-pyridylazo)-2-naphthol-6-sulphonic acid (5-Br-PAN-S) complex on a styrene-divinylbenzene anion-exchange resins. The absorbances of resin sorbed iron(II) complex is measured directly at 765 and 850 nm. Iron(III) was determined by difference measurements after reduction of iron(III) to iron(II) with hydroxylamine. The linear range of the determination is 0-25 mug for iron(II) or total iron. The detection limit for a sample volume of 100 ml using 0.5 g of anion-exchange, corresponds to 2.1 mug l(-1). The method has been successfully applied to the determination of iron(II) and iron(III) in drinking water and natural waters.