研究目的
To design a procedure for building N mixtures of P fluorophores to enable optimal signal transfer of excitation-emission matrices (EEM) between a portable fluorimeter based on LEDs and a master fluorimeter, independent of the target analytes.
研究成果
The designed procedure successfully enabled the unequivocal identification of target analytes (enrofloxacin and flumequine) using a portable fluorimeter, with signal transfer to a master fluorimeter ensuring analytical quality. The method's independence from the target analytes' chemical nature and matrix represents a significant advancement for in situ fluorescence measurements.
研究不足
The study's approach is limited by the need for specific fluorophores to build the transfer set and the requirement that the transfer function must be built with samples measured in both instruments. The methodology may need adaptation for different types of signal transfer problems.
1:Experimental Design and Method Selection:
The study involved designing a procedure to build optimal mixtures of fluorophores for EEM signal transfer. The methodology included using PARAFAC for data decomposition and building transfer functions between fluorimeters.
2:Sample Selection and Data Sources:
Samples containing coumarin 120, DL-Tyrosine, and DL-Tryptophan were prepared in specific concentration ranges. These samples were measured using both a portable fluorimeter and a master fluorimeter.
3:List of Experimental Equipment and Materials:
Equipment included a PerkinElmer LS50B Luminescence Spectrometer (master fluorimeter) and a StellarNet Inc. spectrometer system (portable fluorimeter). Chemicals included various fluorophores and antibiotics.
4:Experimental Procedures and Operational Workflow:
The procedure involved recording EEMs of the samples in both instruments, building a transfer function, and applying it to samples containing target analytes (enrofloxacin and flumequine).
5:Data Analysis Methods:
Data were analyzed using PARAFAC decomposition, correlation coefficients between reference spectra and PARAFAC loadings were calculated, and a desirability function was used for optimization.
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