UV-Vis spectroscopic detection coupled with chemometrics for the measurement of mixed organic acids in water samples enriched by radial electric focusing solid phase extraction

• Autorzy: Guo Y. , Liu X. , Liu J. , Bian X. , Zhang Q. , Pan J. , Wan D.

Identyfikatory

DOI

10.24425/119562

• Języki publikacji: EN

Abstrakty

EN

Due to the difficulty of detecting traces of organic acid mixture in an aqueous sample and the complexity of resolving UV-Vis spectra effectively, a combinatory method based on a self-made radical electric focusing solid phase extraction (REFSPE) device, UV-Vis detection and partial least squares (PLS) calculation is proposed here. In this study, REFSPE was used to enhance the extraction process of analytes between the aqueous phase and the membrane phase to enrich the trace of mixed organic acid efficiently. Then, the analytes, which were eluted from the adsorption film by ethanol with the assistance of an ultrasonic cleaning machine, were detected with UV-Vis spectrophotometry. After that, the PLS method was introduced to solve the problem of overlapping peaks in UV-Vis spectra of mixed substances and to quantify each compound. The linearly dependent coefficients between the predicted value of the model and the actual concentration of the sample were all higher than 0.99. The limit values of detection for benzoic acid, phthalic acid and p-toluene sulfonic acid were found at 9.9 μg/L, 12.2 μg/L and 13.8 μg/L with the relative recovery values between 84.8% and 117.9%. The RSD (n = 20) values of each component are 1.17%, 1.11% and 0.86%, respectively. Therefore, the proposed combined method can determine traces of complex materials in an aqueous sample efficiently and has wonderful potential applications.

Słowa kluczowe

EN

chemometrics; UV-Vis spectrophotometer; radial electric focusing solid phase extraction; mixed organic acids

• Wydawca: Komitet Metrologii i Aparatury Naukowej PAN
• Czasopismo: Metrology and Measurement Systems
• Rocznik: 2018
• Tom: Vol. 25, nr 2
• Strony: 317--329
• Opis fizyczny: Bibliogr. 24 poz., rys., tab., wykr.

Twórcy

autor

Guo Y.

• Tianjin Polytechnic University, School of Environmental and Chemical Engineering, Tianjin 300387, China

autor

Liu X.

• Tianjin Polytechnic University, School of Environmental and Chemical Engineering, Tianjin 300387, China

autor

Liu J.

• Tianjin Polytechnic University, School of Environmental and Chemical Engineering, Tianjin 300387, China

autor

Bian X.

• Tianjin Polytechnic University, State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin 300387, China

autor

Zhang Q.

• Tianjin Polytechnic University, State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin 300387, China

autor

Pan J.

• Tianjin Polytechnic University, State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin 300387, China

autor

Wan D.

• Tianjin Polytechnic University, State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin 300387, China

Bibliografia

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Uwagi

EN

1. This work was supported by the National Science Foundation of China (No. 21476172, 21405110, 21506161 and 21646010).

PL

2. Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).