Detection of Lard in Ink Extracted from Printed Food Packaging Using Fourier Transform Infrared Spectroscopy and Multivariate Analysis

<div><i>Si</i> versus<i> Hi</i> plots for (a) lard, commercial gravure ink, and calibration standards (0.1–20) and (b) calibration standards with the extracted ink samples (S1–S7).</div>

Journal of Spectroscopy

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Figure 5

Figure 5: Detection of Lard in Ink Extracted from Printed Food Packaging Using Fourier Transform Infrared Spectroscopy and Multivariate Analysis 