CAJ | 학술논문

确立了钛4，5-二溴邻硝基苯基荧光酮-CTMAB显色体系，在此基础上确立了钛和铌同时测定的显色体系，应用三层ANN-BP网络解析钛和铌吸收光谱，吸光光度法同时测定铌和钛。方法选择性好，表观摩尔吸光系数εTi557＝1.24×10５L·mol-1·cm-1，εNb540＝1.63×10５L·mol-1·cm-1。对合金钢中铌和钛进行了同时测定，钛和铌的平均相对误差分别为1.30％和1.08％。使用改进的BP算法，避免了可能产生的麻痹现象。提出了便于网络参数选择的收敛评价函数。
학립료태4，5-이추린초기분기형광동-CTMAB현색체계，재차기출상학립료태화니동시측정적현색체계，응용삼층ANN-BP망락해석태화니흡수광보，흡광광도법동시측정니화태。방법선택성호，표관마이흡광계수εTi557＝1.24×10５L·mol-1·cm-1，εNb540＝1.63×10５L·mol-1·cm-1。대합금강중니화태진행료동시측정，태화니적평균상대오차분별위1.30％화1.08％。사용개진적BP산법，피면료가능산생적마비현상。제출료편우망락삼수선택적수렴평개함수。
In this paper a three-layer artificial neural networks was applied to the simultaneous determination of titanium and niobium by spectrophotometry. Color reactions of Ti( Ⅳ ) and Nb( V ) with 4,5-dibromo-o-ni-trophenyl-fiuorone in the presence of CTMABwas studied. The apparent molar absorptivities of the complexes of titanium and of niobium were found to be 1.24×105L·mol-1·cm-1 and 1.63×105L·mol-1·cm-1 respectively.A method was established for the simultaneous determination of titanium and niobium in steel with RSD's for Ti and Nb to be 1.3%and 1.08% respectively. The paralysis in the procedure of training about ANN was avoided with the improved backpropagation algorithms. The criterion function convenient for selecting of the parameters about the training of networks was also suggested.