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Citation: SONG Zhongrong, ZOU Rong, HE Jiahong, XU Qiang. Resonance Light Scattering Spectral Method for Determination of Trace Ferrum(Ⅲ) with Acridine Red[J]. Chinese Journal of Applied Chemistry, ;2012, 29(5): 597-603. doi: 10.3724/SP.J.1095.2012.00280 shu

Resonance Light Scattering Spectral Method for Determination of Trace Ferrum(Ⅲ) with Acridine Red

1.
Chemistry and Environment Engineering College, Chongqing University of Arts and Sciences, Chongqing 402168, China

Corresponding author: XU Qiang,
Received Date: 28 June 2011
Available Online: 26 September 2011
Fund Project: 重庆市教育委员会资助项目(KJ111210) (KJ111210)重庆文理学院重点资助项目(Z2010HH12) (Z2010HH12)

In hydrochloric acid solution of pH=3.2,ferrum(Ⅲ) can oxidize I^-into the form of I₃^- and acridine red(AR) can react with I₃^- to form of AR-I₃ ion association complexes(the composition stoichiometry was defined as n(I₃^-):n(AR)=1:1).The association complexes automatically aggregate to(AR-I₃)_n association particles.In this case,the resonance light scattering(RLS) intensities are enhanced greatly.The maximum RLS wavelength locates at 468 nm.The optimum conditions of the reaction,influence factors and the effect of coexisting substances were investigated.In addition,the reaction mechanism of the ion-association complex was discussed.The resonance scattering intensity(ΔI₄₆₈ nm) was linearly related to the concentration of ferrum(Ⅲ) in the range of 0.08~0.56 mg/L with a detection limit of 5.76×10^-7 g/L.The assay was applied to the detection of trace ferrum(Ⅲ) in realistic samples,with a RSD of 3.3% and the recovery range of 96.0%~102.4%,and the results were in a good agreement with that of atomic absorption spectrometry assay.
- acridine red,
- resonance light scattering,
- association particle,
- ferrum(Ⅲ)
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