摘要
当交流电流密度很大时,“E-t”曲线出现上下电位时滞平阶,示波图两端将有稳定亮点,这时的“E-t”曲线由一系列高次谐波组成。本文首次利用富里叶变换对交流示波极谱图进行频谱分析,并将此频谱用于分析测试。 1 底液“E-t”
Application of frequency-spectrum analysis to oscillopolarogram using Fourier transformation technique is given in this paper. Harmonic equations of E-t curve of the supporting electrolyte are given. Theoretical conclusions are confirmed by experimental results. The Faradic rectification is also explained.The frequency-spectrum can be used in analysis. The second and third harmonic potentials can be used to determine the concentration of the depolarizer. The lowest concentration determined is 1 × 10-6 mol/L. The method is more sensitive than the conventional one and the precision is also better. THe factors influencing the frequency-spectrum are studied. The influence of dissolved oxygen on ordinary oscillopolarogram is not obvious but its effect can be seen easily in the frequency-spectrum analysis.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1991年第5期604-606,共3页
Chemical Journal of Chinese Universities
关键词
交流示波极谱
频谱分析
傅氏变换
a. c. Oscillopolarogram, Frequency-spectrum analysis, Fourier transformation