Afkhami Abbas, Abbasi-Tarighat Maryam
Faculty of Chemistry, Bu-Ali Sina University, Hamadan 65174, Iran.
Talanta. 2009 Apr 30;78(2):424-31. doi: 10.1016/j.talanta.2008.11.032. Epub 2008 Nov 30.
Wavelet transformation of kinetic profiles as a new and simple method was developed for the simultaneous determination of binary mixtures without prior separation steps. The mathematical explanation of the procedure is illustrated. Daubechies (db), symlet (sym) and discrete meyer wavelet (meyr) from the family of wavelet transforms were selected and applied under the optimal conditions for the resolution of binary mixtures. A model data as well as experimental data were tested. The results from the experimental data relating to the simultaneous spectrophotometric determination of phosphate and silicate based on the formation of phospho- and silico-molybdenum blue complexes in the presence of ascorbic acid, and also simultaneous determination of Co(2+) and Ni(2+) based on their complexation reactions with 1-(2-pyridylazo)-2-naphthol (PAN) in micellar media at pH 6.0 were presented as real models. The proposed method was validated by simultaneous determination of phosphate and silicate in detergent and tap water and also Co(2+) and Ni(2+) in tap water samples.
开发了一种将动力学曲线进行小波变换的新的简单方法，用于同时测定二元混合物，无需事先进行分离步骤。文中阐述了该方法的数学原理。从小波变换族中选择了Daubechies（db）、symlet（sym）和离散meyer小波（meyr），并在最佳条件下应用于二元混合物的分离。对模型数据和实验数据进行了测试。基于在抗坏血酸存在下形成磷钼蓝和硅钼蓝配合物，同时分光光度法测定磷酸盐和硅酸盐，以及基于Co(2+)和Ni(2+)在pH 6.0的胶束介质中与1-(2-吡啶偶氮)-2-萘酚（PAN）的络合反应同时测定Co(2+)和Ni(2+)的实验数据结果作为实际模型给出。通过同时测定洗涤剂和自来水中的磷酸盐和硅酸盐以及自来水样品中的Co(2+)和Ni(2+)，验证了所提出的方法。
