Voltammetric study on the interaction of heparin with toluidine blue, and its analytical application

作者: Xiu Ying Peng , Hong Qun Luo , Nian Bing Li

DOI: 10.1007/S00604-006-0641-7

关键词: Linear rangeHeparinAnalytical chemistryCyclic voltammetryVoltammetryToluidineNuclear chemistryElectrochemistryDetection limitChemistryPolyelectrolyte

摘要: The interaction of heparin with toluidine blue (TB) was studied by voltammetry. In pH 5.8 Britton-Robinson (BR) buffer, heparin, which is negatively charged, easily binds to the positively charged TB form a polyelectrolyte complex. Due formation complex, well-defined redox peaks at glass carbon electrode decreased correspondingly without movement peak potential after addition heparin. reaction conditions were optimized carefully. Based on decrease current solution, new electrochemical analytical method established for linear range from 1.0 20.0 µg mL−1 and detection limit 0.44 mL−1. relative standard deviation (RSD) five parallel determinations 10.0 1.07%. This applied determination in sodium injection samples satisfactory results.

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