A novel micellar chromatographic procedure for the determination of metanil yellow in foodstuffs

Ashok, Vipin; Agrawal, Nitasha; Durgbanshi, Abhi̧lasha; Esteve‐Romero, Josep; Bose, Devasish

doi:10.1039/c5ay02377g

Cited by 29 publications

(6 citation statements)

References 23 publications

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“…Ion-pair liquid chromatography detected with 99% linearity the presence of azo dyes, such as metanil yellow, in the range of 0.05 ppm to 10 ppm in food [ 46 ]. Similarly other methods such as high performance liquid chromatography-electrospray ionization tandem mass spectrometry [ 47 ], high performance capillary electrophoresis [ 48 ], and micellar chromatographic method [ 49 ] have been used for detection of metanil yellow and other dyes in food and beverages. Despite their high accuracies and satisfactory detection limits, these conventional methods are limited in practicality due to their operational complexity and sample-destructive nature.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Turmeric Powder Adulterated with Metanil Yellow Using FT-Raman and FT-IR Spectroscopy

Dhakal

Chao

Schmidt

et al. 2016

Foods

111

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Turmeric powder (Curcuma longa L.) is valued both for its medicinal properties and for its popular culinary use, such as being a component in curry powder. Due to its high demand in international trade, turmeric powder has been subject to economically driven, hazardous chemical adulteration. This study utilized Fourier Transform-Raman (FT-Raman) and Fourier Transform-Infra Red (FT-IR) spectroscopy as separate but complementary methods for detecting metanil yellow adulteration of turmeric powder. Sample mixtures of turmeric powder and metanil yellow were prepared at concentrations of 30%, 25%, 20%, 15%, 10%, 5%, 1%, and 0.01% (w/w). FT-Raman and FT-IR spectra were acquired for these mixture samples as well as for pure samples of turmeric powder and metanil yellow. Spectral analysis showed that the FT-IR method in this study could detect the metanil yellow at the 5% concentration, while the FT-Raman method appeared to be more sensitive and could detect the metanil yellow at the 1% concentration. Relationships between metanil yellow spectral peak intensities and metanil yellow concentration were established using representative peaks at FT-Raman 1406 cm−1 and FT-IR 1140 cm−1 with correlation coefficients of 0.93 and 0.95, respectively.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Turmeric Powder Adulterated with Metanil Yellow Using FT-Raman and FT-IR Spectroscopy

Dhakal

Chao

Schmidt

et al. 2016

Foods

111

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“…As a promise in sustaining future research, the contribution of younger generation of Indian analytical chemists either independently or in a group is most significant. To mention a few examples, breakthrough is attained on the development of sensors, , microextraction technique with AAS and electrochemistry at Bilaspur; micellar liquid chromatography at Sagar; sample handling techniques and separation science − at Jabalpur, Lucknow, and Bhopal; metal-complexes as sensors and analytical applications of ionic liquids at Delhi; nanoparticles modified electrochips sensors at Chandigarh; consumer products analysis using packed sorbents at Patiala, and by proton induced γ-ray emission at Hyderabad. As novel innovations, SDME has been coupled with FT-IR at Raipur and fiber-optics based cuvetteless microspectrophotometry at Jabalpur.…”

Section: Current Research Statusmentioning

confidence: 99%

Perspective: Status and Future of Analytical Chemistry in India

Verma

2017

Anal. Chem.

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“…MLC has proved itself to be a useful technique in the determination of diverse group of compounds. This technique was successfully applied for determination of dyes, drugs, pesticides, toxicants, and other complex compounds (Ashok et al 2014;Bose et al 2005;Agrawal et al 2014;Ashok et al 2015). The stable and reproducible behavior of micellar mobile phases allows accurate prediction of solute retention with a model that can also be used to optimize the separation of mixtures.…”

Section: Introductionmentioning

confidence: 97%

Detection of Methyl Orange in Saffron and Other Edibles Using Direct Injection Micellar Liquid Chromatography

Ashok

Agrawal²,

Esteve‐Romero

et al. 2016

Food Anal. Methods

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A simple, sensitive, rapid and eco friendly micellar liquid chromatographic method was developed for the detection of banned color methyl orange in counterfeit saffron and prepared foodstuffs. Methyl orange (p-[[p-(dimethylamino) phenyl] azo] benzenesulfonic acid sodium salt) is a hazardous dye used in titration and is known to be used as common adulterant in counterfeit saffron and cooked foodstuffs like Jalebi (Indian sweet), mango shake, Namkeen (salted snacks), tomato ketchup and ice candy etc., due to its pleasant orange color. In the present work, methyl orange was detected in various food samples using direct injection micellar liquid chromatography without any pretreatment step. A C18 column with an optimum micellar mobile phase containing 0.05-M sodium dodecyl sulfate (SDS), 2 % pentanol buffered to pH 7 was used. Detection was carried out at 458 nm. The retention time was 3.7 min without showing any matrix effect. Linearity (r > 0.9999), intraday and interday precision RSD (%) was less than 1.00 in micellar media. Limit of detection and quantification was found to be 0.05 mg/kg and 0.10 mg/ kg, respectively. Robustness study was also included as a part of method validation. The developed method proved to be reliable and sensitive for determination of methyl orange in real food samples.

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A novel micellar chromatographic procedure for the determination of metanil yellow in foodstuffs

Abstract: A novel method was developed to detect harmful colours and dyes, in spices and other edible foodstuffs.

Cited by 29 publications

References 23 publications

Evaluation of Turmeric Powder Adulterated with Metanil Yellow Using FT-Raman and FT-IR Spectroscopy

Evaluation of Turmeric Powder Adulterated with Metanil Yellow Using FT-Raman and FT-IR Spectroscopy

Perspective: Status and Future of Analytical Chemistry in India

Detection of Methyl Orange in Saffron and Other Edibles Using Direct Injection Micellar Liquid Chromatography

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