所属单位：理学院
发表刊物：FOOD ANALYTICAL METHODS
关键字：Self-enhanced absorption spectra Wavelet transform Thiamethoxam Tea infusion
摘要：A method of self-enhanced absorption spectrum was proposed for the quantitative determination of thiamethoxam in tea infusion. Based on wavelet transform of original absorption spectra and self-enhanced spectra by wavelet function Gau8, the ratio of wavelet coefficients at analysis point was used to acquire thiamethoxam's concentration. The analysis point of original spectra is at 251 nm by observation which may result in artificial error. However, the analysis point of self-enhanced spectra is at zero point which is fixed, reducing artificial impact. Certain parameters such as limit of detection(LOD), limit of quantitation(LOQ), root mean of standard error of calibration(RMSEC), and relative standard deviation (RSD) were applied which illustrated that wavelet transform of both the two kinds of spectrum could determine thiamethoxam's concentration. There was no significant difference between the two kinds of spectrum by one-way ANOVA test. Besides, prediction of actual samples indicated that the method of wavelet transform of self-enhanced absorption spectrum is an effective method for quantitative determination of thiamethoxam residue in tea infusion.
ISSN号：1936-9751
是否译文：否
发表时间：2017-03-01
合写作者：张吉华
通讯作者：赵志敏
发表时间：2017-03-01