Gradient liquid chromatographic method for the simultaneous determination of sweeteners, preservatives and colours in soft drinks

Determination of eight synthetic food colorants in drinks by high-performance ion chromatography

“…Both the chromato- verified by the determination of colorants present in liquid and instant drinks. This proposed method has shown good operational stability over 1 month for at least 80 assays, and gave reliable and reproducible individual assays [13]. Sample pretreatment techresults with simple sample pretreatment operation.…”

Dispersive solid-phase microextraction and capillary electrophoresis separation of food colorants in beverages using diamino moiety functionalized silica nanoparticles as both extractant and pseudostationary phase

“…Several methods have been widely used to analyze the colorants in food, such as thin-layer chromatography (TLC) [2], gas chromatography (GC) [3], high-performance liquid chromatography (HPLC) [4,5] and HPLC-mass spectrometry (LC-MS) [6]. Among them, HPLC is the most widely used method because it can offer good repeatability and acceptable sensitivity with the traditional UV-Vis detection.…”

A capillary electrophoresis microsystem for the rapid in-channel amperometric detection of synthetic dyes in food

“…Thus, the separation of some additives by using capillary zone electrophoresis (CZE) and micellar electrokinetic chromatography (MEKC) has been described in several papers [12][13][14][15][16][17], but these techniques are affected by sensitivity problems as a result of small injection volumes. Similarly, several reversed-phase, ion-pair and anion-exchange HPLC methods have been developed [18][19][20][21][22][23][24], even though almost all of these methods are affected by some drawbacks, in that they enable the determination of only specific classes of additives and require frequently a lengthy extractive pre-treatment of the sample, usually with incomplete recovery of some of the searched species.…”