Fig. 4

Intra-day and inter-day precisions and accuracy of HMF detection in honey samples determined by the proposed TAPP-assisted MALDI MS method for samples spiked with low, medium, and high concentrations of HMF.

Intra-day and inter-day precisions and accuracy of HMF detection in honey samples determined by the proposed TAPP-assisted MALDI MS method for samples spiked with low, medium, and high concentrations of HMF.