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Citation: YANG Ji-Dong, WANG Xiang-Hong, LIU Zhong-Fang, KONG Ling, LIU Shao-Pu. Determination of Sodium Alginate with Basic Bisphenylnaphthylmethane Dyes by Resonance Rayleigh Scattering[J]. Chinese Journal of Applied Chemistry, ;2008, 25(4): 385-390. shu

Determination of Sodium Alginate with Basic Bisphenylnaphthylmethane Dyes by Resonance Rayleigh Scattering

1.
a College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715;
2.
b Department of Chemistry, Fuling Normal College, Chongqing

Corresponding author: LIU Shao-Pu,
Received Date: 10 May 2007
Available Online: 20 September 2007
Fund Project: 国家自然科学基金资助项目(20475045) (20475045)重庆市教委资助项目(KJ051303) (KJ051303)

In a Britton-Robinson buffer solution (pH 4.0~5.2),sodium alginate (SA) can be bound with some basic bisphenylnaphthylmethane dyes such as Victoria blue 4R(VB4R),Victoria blue B(VBB),or night blue (NB) to form a new product,resulting in a significant enhancement of Resonance Rayleigh Scattering (RRS) and the appearance of a new RRS spectrum.The RRS intensity was directly proportional to the SA concentration in a range of 0.075~4.0 mg/L for all the systems,which showed that the method has a fairly high sensitivity.The detection limits of SA (3σ) were 22.0×10^-9 g/mL for VB4R-SA system,25.6×10^-9 g/mL for VBB-SA system,and 37.5×10^-9 g/mL for NB-SA system,respectively.The VB4R system exhibited the highest sensitivity,for which the effects of coexisting substances were investigated,and the result showed that the method had a good selectivity.This method was applied to determination of trace amounts of SA in noodle samples and kelp extract with satisfactory results.
- Sodium Alginate,
- Basic bisphenylnaphthylmethane dyes,
- Resonance Rayleigh Scattering
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