Simultaneous determination of 14 oil-soluble synthetic dyes in chilli products by high performance liquid chromatography with a gel permeation chromatography clean-up procedure

A screening method of oil-soluble synthetic dyes in chilli products based on multi-wavelength chromatographic fingerprints comparison

“…It could be seen that the double chromatographic peaks for Sudan orange G and Sudan Black B were recorded. The double chromatographic peaks for Sudan orange G and Sudan Black B were also observed in other studies (Noguerol-Cal, López-Vilariň o, Fer nández-Martínez, Barral-Losada, & González-Rodríguez, 2008;Zhu et al, 2014). The appearance of multiple chromatographic peaks by injecting a standard could be related to existence of impurities, degradation process or presence of isomers.…”

“…The commonly used HPLC mobile phase for separation of oil-soluble dyes was acetonitrile or methanol containing 0.1% formic acid. We ever used methanol-acetone (9:1, v/v) containing 0.1% formic acid as mobile phase, and obtain efficient separation of 8 oil-soluble synthetic dyes, these dyes contain Para red, Sudan I-IV, Sudan red G, Sudan red B, Sudan red 7B, Sudan red G (Zhu, Li, Gong, Zhou, & Li, 2007). Sun et al (2007) reported the good separation of 10 azo-dyes (Para red, Sudan I-IV, Sudan red G, Sudan red B, Sudan red 7B, Sudan orange G, and Butter yellow) with methanol containing 0.1% formic acid and 0.1% formic acid aqueous solution as the mobile phase system under the gradient elution condition.…”

Determination of polycyclic aromatic hydrocarbons in edible oil by gel permeation chromatography and ultra-high performance liquid chromatography coupled with diode array detector and fluorescence detector

“…Based on the different molecular size of substances, GPC can separate compounds very accurately. The technique is often used for removing certain components with big molecules, such as triglycerides [16][17][18], pigment [19], and the desired product. During the separating procedure, the target compounds experience less loss, because there is no chemical interaction between compounds and the column.…”

Towards SERS based applications in food analytics: Lipophilic sensor layers for the detection of Sudan III in food matrices

“…For the analysis liquid chromatography, mainly highpressure liquid chromatography (HPLC), in combination with different types of mass spectrometry is applied [6][7][8][9]. Moreover, other types of detectors like UV-vis-spectrometers [10][11][12] or photodiode arrays [13][14][15][16][17] come also into operation. An elaborate overview about sample pre-processing and various types of chromatographic approaches for detecting Sudan dyes can be found herein [5].…”