| 正交设计-偏最小二乘光度法同时测定磷和硅 |
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| 引用本文： | 胡利芬,曹顺安.正交设计-偏最小二乘光度法同时测定磷和硅[J].理化检验(化学分册),2005,41(1):37-39. |
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| 作者姓名： | 胡利芬 曹顺安 |
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| 作者单位： | 武汉大学,动力与机械学院水质工程系,武汉,430072 |
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| 摘 要： | 采用正交设计法研究了磷、硅在酸性钼酸铵和混合还原剂中的最佳显色条件，建立了多波长紫外可见光度法同时测定磷、硅的方法。试验中采集多个波长下的吸光度构成校正矩阵，用偏最小二乘法对该矩阵进行解析，得出了校正模型。该模型与通过主成分回归法得到的模型相比，预测结果更准确。
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| 关 键 词： | 正交设计，紫外光度法 偏最小二乘法 主成分回归 磷 硅 |
| 文章编号： | 1001-4020(2005)01-0037-03 |
| 修稿时间： | 2003年6月28日 |
MULTIWAVELENGTH UV-SPECTROPHOTOMETRIC DETERMINATION OF PHOSPHATE AND SILICATE WITH OPTIMIZATION BY ORTHOGONAL EXPERIMENTAL DESIGN AND CALIBRATION BY PARTIAL LEAST SQUARE METHOD |
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| HU Li-fen,CAO Shun-an.MULTIWAVELENGTH UV-SPECTROPHOTOMETRIC DETERMINATION OF PHOSPHATE AND SILICATE WITH OPTIMIZATION BY ORTHOGONAL EXPERIMENTAL DESIGN AND CALIBRATION BY PARTIAL LEAST SQUARE METHOD[J].Physical Testing and Chemical Analysis Part B:Chemical Analgsis,2005,41(1):37-39. |
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| Authors: | HU Li-fen CAO Shun-an |
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| Abstract: | The reaction-conditions of the formation of heteropolyacids of phosphate and silicate with acidic molybdate solution and of their reduction to form molybdenum blue with ascorbic acid were optimized by the method of orthogonal experimental design. Under the optimized conditions, the simultaneous determination of phosphate and silicate was carried out by the multiwavelength UV-spectrophotometry, with calibration by PLS method. The matrix was formed by the date of absorbances at different wavelengths, and was analyzed by the PLS method. The model of calibration obtained by this method was found to be better in accuracy than the model obtained by the principle component regression method. |
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| Keywords: | UV-spectrophotometry Phosphate Silicate Orthogonal experimental design Partial least square method Principle component regression method |
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