光学学报, 2019, 39 (1): 0130001, 网络出版: 2019-05-10 复制并引用该论文  本文已被引 1 次  被引通知

图 & 表

图 1. 三种单离子的光谱分析。(a)单离子原始光谱;(b) 波长点信息占比离子分析图

Fig. 1. Spectra analysis of three single ions. (a) Original spectra of single ions; (b) ion proportion at wavelength point

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图 2. 不同阶次的光谱信号。(a)原始光谱信号;(b)原始光谱滤波信号;(c)一阶光谱滤波信号;(d)二阶光谱滤波信号

Fig. 2. Spectral signals with different orders. (a) Original spectral signals; (b) original spectral filtering signals; (c) first-order spectral filtering signals; (d) second-order spectral filtering signals

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图 3. 不同离子覆盖度与阶次的关系。(a) Co2+; (b) Cu2+

Fig. 3. Relationship among coverage degrees and orders for different ions. (a) Co2+; (b) Cu2+

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图 4. 小波滤波-分数阶微分方法的失真度与阶数的拟合图

Fig. 4. Fitting plot of order and distortion degree with wavelet filtering-fractional differentiation method

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图 5. 不同离子的非劣解集图。(a) Co2+; (b) Cu2+

Fig. 5. Non-inferior solution sets of different ions. (a) Co2+; (b) Cu2+

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图 6. 不同微分阶数光谱图。(a)原始光谱图;(b) 1阶光谱图;(c) 2阶光谱图;(d) 1.4阶光谱图;(e) 1.5阶光谱图

Fig. 6. Spectra with different differential orders. (a) Original spectra; (b) first-order spectra; (c) second-order spectra; (d) 1.4-order spectra; (e) 1.5-order spectra

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图 7. 预处理后基于多指标融合特征波长点提取

Fig. 7. Wavelength point selection based on multi-index fusion feature after pretreatment

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图 8. 不同离子的预测质量浓度误差图。(a) Co2+; (b) Cu2+

Fig. 8. Errors between predicted and actual mass concentrations of different ions. (a) Co2+; (b) Cu2+

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表 1试剂体系的选择

Table1. Selection of reagent system

Parameter Value Mass concentration of nitroso-R-salt /(g·L-1) 0.04 pH of NaAc-HAc 5.5 Mass concentration of Cu2+ /(mg·L-1) 10 Mass concentration of Co2+ /(mg·L-1) 10 Mass concentration of Zn2+ /(g·L-1) 50

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表 2不同阶数微分方法得到的覆盖度和失真度

Table2. Coverage degree and distortion degree with differentiation methods with different orders

Ions Index Original spectrum First-order differentiation Second-order differentiation MOPSO Co2+ Coverage degree 0.7481 0.7082 0.7506 0.6808 Distortion degree 0.5869 0.6574 0.9824 0.2498 Cu2+ Coverage degree 1 0.9701 0.8529 0.9252 Distortion degree 0.5869 0.6574 0.9824 0.5707

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表 3不同预处理结果的对比

Table3. Comparison of results by different pretreatments

Ions Index Original spectra First-order differentiation Second-order differentiation Fractional differentiation Co2+ RMSEP 0.2963 0.1219 0.1373 0.1175 R2 0.9098 0.9840 0.9796 0.9866 Maximum relative error /% 161.53 19.71 25.83 15.54 Mean relative error /% 26.80 6.14 7.36 5.25 Qualified rate /% 37.5 81.25 75 93.75 Cu2+ RMSEP 0.0810 0.0666 0.1998 0.0679 R2 0.9922 0.9943 0.9513 0.9939 Maximum relative error /% 22.53 13.96 134.80 8.53 Mean relative error /% 6.23 4.36 20.72 3.26 Qualified rate /% 75 93.75 43.75 100

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朱红求, 陈俊名, 阳春华, 李勇刚, 龚娟. 锌溶液中痕量Cu ²⁺、Co ²⁺的检测光谱预处理方法 [J]. 光学学报, 2019, 39(1): 0130001. Hongqiu Zhu, Junming Chen, Chunhua Yang, Yonggang Li, Juan Gong. Spectral Pretreatment Method for Detection of Trace Cu ²⁺ and Co ²⁺ in Zinc Solution [J]. Acta Optica Sinica, 2019, 39(1): 0130001.