Determination of dextrin based on its self-aggregation by resonance light scattering technique.
A novel free-probe assay of dextrin was established based on the resonance light scattering (RLS) enhancement in aqueous solution due to the self-aggregation of dextrin. The RLS intensity was well proportional to the concentration of dextrin over the wide range 0.2-14microg mL(-1) and a detection limit 0.02microg mL(-1) was obtained in the optimum conditions. The effect factors such as pH, buffer medium, holding time, ionic strength and temperature were studied in detail. Little or no interference was presented in the detection when adding coexisting substances including various metal ions and some saccharine in the solution. The assay proposed owns the advantages of easy operation, rapidity, sensitivity and practicability. Three synthetic samples and three kinds of medicine samples were analyzed with satisfactory results.
Chen
Zhanguang
Z
Department of Chemistry, Shantou University, Shantou 515063, China. kqlu@stu.edu.cn
Zhu
Li
L
Song
Tianhe
T
Huang
Jinhai
J
Han
Yali
Y