First-derivative spectrophotometric determination of ponceau 4R, sunset yellow and tartrazine in confectionery products

Sayar, Sedat; Özdemır, Yüksel

doi:10.1016/s0308-8146(97)00073-3

Cited by 58 publications

(27 citation statements)

References 6 publications

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“…For the purpose of quantification of the dye content in the pharmaceutical products and food, modern analytical methods and techniques are currently used, such as follows: high performance liquid chromatography (HPLC) [39,40,43,46,47,51,64,70,74], ion-pair liquid chromatography (IP-LC) [9,36], thin-layer chromatography (TLC) [5,49,63], spectrometry, derivative spectrometry, and spectrophotometric methods [7,57,62,68]. Electroanalytical methods also find its application in this field; mainly adsorptive voltammetry [1] and differential pulse polarography [8,12].…”

Section: Determination Of Dyes In Pharmaceuticalsmentioning

confidence: 99%

Organic Colouring Agents in the Pharmaceutical Industry

et al. 2017

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Section: Determination Of Dyes In Pharmaceuticalsmentioning

confidence: 99%

Organic Colouring Agents in the Pharmaceutical Industry

et al. 2017

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“…10 Therefore the importance of their removal/decolorization 11-13 and their determinations [14][15][16][17] solvent (up to 3 mL). 44 To overcome these problems, in our previous work we introduced a micro-cloud point extraction (MCPE) technique.…”

Section: Introductionmentioning

confidence: 99%

“…Some azo dyes are quite harmful and poisonous, 9 and even those that are not toxic, like acid red 18, can be harmful if used in excess. 10 Therefore the importance of their removal/decolorization [11][12][13] and their determinations [14][15][16][17] in environmental samples is obvious. Many analytical methods have been suggested for extraction and determination of azo dyes such as cloud point extraction (CPE), [18][19][20] liquid-liquid extraction (LLE), 21,22 liquid phase microextraction (LPME), 23 solid phase extraction, [24][25][26] solid phase microextraction, 27 and molecularly imprinted solid phase extraction.…”

Section: Introductionmentioning

confidence: 99%

Application of a Novel Micro-Cloud Point Extraction for Preconcentration and Spectrophotometric Determination of Azo Dyes

Ghasemi¹,

Kaykhaii²

2016

Journal of the Brazilian Chemical Society

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A novel room temperature micro-cloud point extraction procedure using triton X-114 surfactant as extracting phase was developed for preconcentration and extraction of three azo dyes (orange G, methyl orange, and acid red 18) from aqueous samples using molecular absorption spectrophotometry in the visible region. The effects of different parameters such as concentration of surfactant and added salting out reagent (Na 2 SO 4 ), pH and type of diluting solvent on microextraction were studied and optimized. Under optimum conditions, calibration curves were linear in the range of 2.0-10.0, 0.2-1.0 and 2-12 mg L -1 with the detection limit of 1.6, 0.6 and 111.0 μg L -1 for orange G, methyl orange and acid red 18, respectively. The relative standard deviation was better than 13.12%. The method was applied to the determination of the azo dyes in water samples. Keywords: micro cloud point extraction, orange G, methyl orange, acid red 18, water analysis IntroductionThe importance of synthetic dyes in today industries can't be denied.1 Every year, thousands tons of such dyes are consumed in food, paper, leather, and textile industries.2,3 From these industries, large volumes of dyes are released to environment and find their way to water and soil. Environmental pollution with dyes can have dire effect on animal, plants, and human health. [4][5][6][7] One of the most important families of dyes is azo dyes that contain −N=N− bond in their structures.8 So far azo dyes have found many applications. Some azo dyes are quite harmful and poisonous, 9 and even those that are not toxic, like acid red 18, can be harmful if used in excess.10 Therefore the importance of their removal/decolorization 11-13 and their determinations [14][15][16][17] solvent (up to 3 mL). 44 To overcome these problems, in our previous work we introduced a micro-cloud point extraction (MCPE) technique. 45 While sustaining the merits of CPE, in MCPE water bath step is completely eliminated and the consumption of toxic organic solvents has been reduced from a few mL to a few ten μL. These make MCPE a fast, inexpensive, and green technique.In this paper MCPE was successfully applied for the determination of three azo dyes, orange G, methyl orange, and acid red 18 (Figure 1) in tap and wastewater samples. Acid red 18 (Panceau 4R) is a popular food color 46 and many methods have been proposed for its determination. 47,48 Methyl orange (acid orange 52 or gold orange) and orange G (orange gelb or wool orange) have many applications as textile dyeing stuff and staining agents in laboratories. These three dyes are of the most abundant used dyeing agents throughout the world and therefore can find their way to environmental sources as hazardous pollutions. 49,50 To our best knowledge this is the first report of determination of theses dyes with cloud point procedure. Non-ionic surfactant, triton X-114, was used as the extractant phase. Experimental InstrumentA Shimadzu UV-Vis spectrophotometer, UV-160 (Kyoto, Japan), equipped with two microcells (10 μL capacity, Star...

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“…This dye has a nitrogen to nitrogen double bond as its chromophore [1][2] . The group attach to the surface of carbon nanotube, in order to take advantage of its outstanding mechanical, optical, solubility, electrical and thermal properties.…”

Section: Introductionmentioning

confidence: 99%

Enviromentaly Friendly Functionalization of Carboxylated Shortend Multi-Wall Nanotubes with Sunset Yellow Dye

Azizian

Zomorodbakhsh²,

Shameli³

et al. 2012

Orientjchem.

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In this paper, the chemical functionalization of carboxylated shortend multi-walled carbon nanotubes (MWNT-COOH) by sunset yellow dye via esterification method in water have been investigated.The functionalized MWNTs were characterized by Fourier Transform Infrared spectroscopy (FT-IR), Raman spectroscopy, elemental analysis,scanning electron microscopy (SEM), Defunctionalization test and UV analysis.

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First-derivative spectrophotometric determination of ponceau 4R, sunset yellow and tartrazine in confectionery products

Cited by 58 publications

References 6 publications

Organic Colouring Agents in the Pharmaceutical Industry

Organic Colouring Agents in the Pharmaceutical Industry

Application of a Novel Micro-Cloud Point Extraction for Preconcentration and Spectrophotometric Determination of Azo Dyes

Enviromentaly Friendly Functionalization of Carboxylated Shortend Multi-Wall Nanotubes with Sunset Yellow Dye

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