Simultaneous Determination of Pb2+ and Co2+ Based on Fluorescence Quenching of Bi-Color Quantum Dots with the Aid of Multivariate Calibration Techniques

Xin Feng Zhu; Jue Feng; Jun Wu Zhu; Bin Li; Qin Xu

doi:10.4028/www.scientific.net/KEM.636.41

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 636Simultaneous Determination of Pb2+ and Co2+ Based...

Simultaneous Determination of Pb²⁺ and Co²⁺ Based on Fluorescence Quenching of Bi-Color Quantum Dots with the Aid of Multivariate Calibration Techniques

Abstract:

Simultaneous determination of Pb²⁺ and Co²⁺ without separation has been successfully achieved by a bicolor quantumn dots mixture. This method takes advantage of the different degrees of the fluorescence quenching effects of Pb²⁺ and Co²⁺ to the bio-color quantum dots. Chemometrical approaches were applied to assist the discrimination and detection process. The construction of the multivariate calibration models, based on partial least squares (PLS), orthogonal projections to latent structures least squares (O-PLS) and kenel based orthogonal projections to latent structures (K-OPLS), allowed the simultaneous determination of Pb²⁺ (in the concentration range of 0-120 mM) and Co²⁺ (0-300 mM). The optimal number of factors in PLS and the optimal number of orthogonal components in O-PLS and K-OPLS were carefully selected. A comparison of prediction performances between these results was performed by relative prediction errors, square of the correlation coefficient and root mean squares error of prediction.

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Periodical:

Key Engineering Materials (Volume 636)

Pages:

41-44

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.636.41

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Online since:

December 2014

Authors:

Xin Feng Zhu*, Jue Feng, Jun Wu Zhu, Bin Li, Qin Xu

Keywords:

Fluorescence Quenching, K-OPLS, Multivariate Calibration, O-PLS, PLS, Quantum Dot

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