Selective metals determination with a photoreversible spirobenzopyran
Selective metals determination with a photoreversible spirobenzopyran
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DOI：
10.1021/ac990755s
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发表时间：
1999-12-01
影响因子：
7.4
通讯作者：
Winkler, JD
中科院分区：
文献类型：
--
作者：
Evans, L;Collins, GE;Winkler, JD
研究了硝基喹啉螺吡喃吲哚啉（NQSP）的光可逆金属离子络合行为，并结合偏最小二乘判别分析（PLSD）对6种不同过渡金属离子Zn 2+、Co2+、Hg 2+、Cu 2+、Cd 2+和Ni 2+在单组分和双组分混合物中的选择性识别.选择增塑剂邻苯二甲酸二辛酯作为本研究的支持介质，是基于（1）其增强金属络合中的光可逆性和蓝移，以及（2）其在支持液膜中的潜在应用，以用于最终的传感器应用。邻苯二甲酸二辛酯中NQSP与二价过渡金属离子的络合在吸收光谱（30-60 nm）中产生可变的蓝移，需要化学计量学技术来克服光谱重叠。PLSD分析用于建立分类分析模型，以区分六种二价过渡金属离子。在实验验证之前，使用净分析物信号的概念研究了进行混合物分析的可行性。金属的单组分和二元组分混合物的识别准确率分别为100%和97.4%，在训练集或预测集中均不包括假阳性。
The photoreversible metal-ion complexation behavior of nitroquinolinospiropyranindoline (NQSP) was studied in combination with the selective identification of six different transition-metal ions, Zn2+, Co2+, Hg2+, Cu2+, Cd2+, and Ni2+, in single- and binary-component mixtures via partial least squares discriminant (PLSD) analysis. The plasticizer, dicapryl phthalate, was chosen as the support medium for this study on the basis of (1) its enhancement of the photoreversibility and hypsochromic shifts seen in metal complexation and (2) its potential application to supported liquid membranes for eventual sensor applications. Complexation of divalent transition-metal ions by NQSP in dicapryl phthalate produced variable hypsochromic shifts in the absorption spectra (30-60 nm), requiring chemometric techniques in order to overcome the spectral overlaps. PLSD analysis was used to build classification analysis models to differentiate between the six divalent transition-metal ions. The feasibility of performing mixture analysis was studied using the concept of net analyte signal prior to experimental verification. Single- and binary-component mixtures of metals were identified with 100 and 97.4% accuracy, respectively, which included no false positives in either the training or prediction sets.