二阶导数谱；
采用傅里叶变换红外光谱法(FTIR)获得了六种婴幼儿奶粉的红外光谱及其二阶导数谱。
Six kinds of infant powdered milk were identified by Fourier transform infrared spectra (FTIR) and their corresponding second derivative infrared spectra.
所获得的一维红外光谱、二阶导数谱和二维相关红外光谱，从不同角度上提供了两者的差异性。因此。
The general infrared spectra (FTIR), secondary derivative IR spectra and two-dimensional correlation infrared spectroscopy (2D-IR) show the dissimilarity of Chaihu and Dayechaihu respectively.
对利用差谱—二阶导数分光光度法直接测定强干扰基体中微量组分的原理和实验方法进行了探讨。
A new method for determining directly trace component in interfering base by absorbance subtraction -second derivative spectrophotometry is proposed.
针对提高磁异常导数的计算精度，提出磁位离散余弦变换谱的分析方法。
A method of magnetic potential spectrum based on the cosine transform is proposed in order to improve the calculating accuracy of magnetic anomaly derivatives.
理论结果用实验的光发射谱和基态性质以及超导数据进行了验证。
The theoretical results have been verified by both the experimental photoemission spectra and ground-state properties, as well as the superconductivity data.
方法二阶导数差示脉冲极谱法。
METHODS The Secondary derivative differential pulse polarography was developed.
建立用一阶导数单扫描极谱法测定食品中凯氏氮含量的简单、快速的方法。
Objective: To establish a simple rapid method for determining Kjeldahl nitrogen content by 1st order differential coefficient single sweep polarography.
在所有的校正模型中，原始谱图经过二阶导数和偏最小二乘（PLS）处理，20个外部样品用于所建模型的验证，实际和预测的平均相对偏差<5%。
For all samples, the raw spectra were pretreated as second derivative and Norris derivative filter(7,5). partial least square (PLS) was used as the calibration algorithm.
建立盐酸吡哆辛及其制剂的二阶导数差示脉冲极谱定量分析方法。
A method for the quantitative analysis of the pyridoxine hydrochloride and its preparation were...
建立盐酸吡哆辛及其制剂的二阶导数差示脉冲极谱定量分析方法。
A method for the quantitative analysis of the pyridoxine hydrochloride and its preparation were...
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