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Visible Spectra of Quinacridone Pigments

Visible spectroscopy can used to determine low ppb levels of migration of colorants used for indirect food contact applications. The US FDA specification requires that the colorant migration be 10 ppb. [Pg.364]

PR38 retain lot (red scan) and C.l. PR38 complaint lot (green scan). [Pg.365]

Red scan is blank LDPE spiked with 9.872 ppb PRl22. Green scan is LDPE with 1.5% PRl 22 type A. Pink scan is LDPE with 1.5% PRl 22 type B. [Pg.365]

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