摘要
建立了浮选CuSCN间接测定抗坏血酸（Vc）的方法。研究表明,在NaNO3存在下,Cu（Ⅱ）被抗坏血酸还原生成的Cu（Ⅰ）与SCN^-形成CuSCN沉淀而被浮选。结果表明,Vc量在2.64-15.8 mg/L范围内与CuSCN的浮选率呈良好的线性关系,回归方程为：E/%=6.008ρ-3.673,r=0.9962。此方法可用于水果和药片中Vc量测定。
A new method for indirect determination of ascorbic acid（Vc） by floatation and separation of CuSCN has been studied in this paper. The study shows that Cu（ Ⅱ ） can be reduced to Cu（ Ⅰ ） by Vc and Cu（ Ⅰ） reacts with the SCN- to form CuSCN, which can be floated on the surface of the liquid phase with NaNO3. A good linear relationship is observed between the floatation efficiency （E/% ） of CuSCN and the amount of Vc, and a linear range is 2.64 - 15.8 mg/L. The linear equation is E（% ） = 6.008c - 3.673 with r = 0.9962. The method is simple, rapid, reliable and nontoxic. The developed method can be applied to indirect determination of Vc in tablets and fruits with satisfactory results.
出处
《分析试验室》
CAS
CSCD
北大核心
2008年第3期45-47,共3页
Chinese Journal of Analysis Laboratory
基金
河南省创忻人才工程(教高[2001]513号)项目资助
