Journal of Food Quality / 2019 / Article / Tab 2

Research Article

Identification of Synthetic Food Colours in Selected Confectioneries and Beverages in Jaffna District, Sri Lanka

Table 2

TLC and spectrophotometric analysis of some nonpermitted and all permitted synthetic red and yellow food colour standards.

Colour standardColourPermitted (P)/nonpermitted (NP)Λmax/nmSolvent systemRf value

CarmoisineRedP516n-Propanol : ammonia = 4 : 10.50
Ponceau 4RRedP5080.39
ErythrosinePinkP5260.77
Allura redRedP5060.46
Rhodamine BPinkNP5530.86
Fast redRedNP5100.55

Sunset yellow FCFOrangeP482Butanol : water : glacial acetic acid = 10 : 6 : 50.73
TartrazineYellowP4260.42
Bromocresol purpleYellowNP5860.91
Metanil yellowYellowNP4410.85

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