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

Ashok, Vipin; Agrawal, Nitasha; Esteve‐Romero, Josep; Bose, Devasish; Dubey, Neeti Prakash

doi:10.1007/s12161-016-0578-3

Cited by 14 publications

(5 citation statements)

References 21 publications

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“…In recent years, several detection methods for MO have been performed to improve the detection sensitivity. These methods include a Micellar Liquid Chromatography [18], an electrochemical sensor based on Smectite-HDTMA/GCE [19], a SERS probe based on β -CD@Ag NP monolayer [20], and an extraction by using chitosan-zinc oxide NPs [21]. In Table S2, the results of linear ranges and detection limits from the reported methods and this method for probing MO were compared.…”

Section: Resultsmentioning

confidence: 99%

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Nitrogen-Doped Carbon Dots from Averrhoa carambola Fruit Extract as a Fluorescent Probe for Methyl Orange

Zulfajri,

Dayalan,

et al. 2019

Sensors

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In this study, a simple and green hydrothermal treatment was performed to prepare nitrogen-doped carbon dots (NCDs) from Averrhoa carambola (AC) fruit extract as a carbon precursor and L-arginine (Arg) as a nitrogen dopant. The AC-NCDs were characterized by UV light, fluorescence spectroscopy, transmission electron microscopy, FTIR spectroscopy, Raman spectroscopy, UV-vis spectroscopy, and zeta potential analyzer. The AC-NCDs were spherical and the average diameter was estimated to be 6.67 nm. The AC-NCDs exhibited the maximum emission intensity at 446 nm with 360 nm excitation wavelength. The fluorescence quenching behavior of AC-NCDs after interacting with methyl orange (MO) dye was studied. The interaction of AC-NCDs and MO was achieved within 3 min and the fluorescence quenching was maintained to a fixed value even after 30 min. The linearity was obtained in the range of 1 to 25 μM MO with a 0.30 μM detection limit. Furthermore, the pH values affected the quenching behavior of the AC-NCDs/MO system where the interaction mechanisms were driven by the electrostatic interaction, π–π interaction, inner filter effect, and energy transfer. The pH 5 maintained higher quenching efficiency while other pH values slightly decreased the quenching efficiency. Incoming applications, the AC-NCDs can be used in various important fields, especially for environmental protection.

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Section: Resultsmentioning

confidence: 99%

“…But, the MO solution is toxic and irritating for human. So far, there are very few reports about the detection methods of MO [18,19,20,21]. Therefore, it is needed to promote facile, simple, and efficient methods.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen-Doped Carbon Dots from Averrhoa carambola Fruit Extract as a Fluorescent Probe for Methyl Orange

Zulfajri,

Dayalan,

et al. 2019

Sensors

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“…MO is a toxic compound that deteriorates water quality and has been banned for use in food products because it is a carcinogen and teratogen due to the presence of aromatic and -N = N-groups inherent in its structure as shown in Fig. 1 [30,31]. It usually gets into the environment in large quantities through the e uent of textile industries.…”

Section: Introductionmentioning

confidence: 99%

Do Adsorbent Pore Size and Specific Surface Area Affect The Kinetics of Methyl Orange Aqueous Phase Adsorption?

Iwuozor

Ighalo

Emenike

et al. 2021

Preprint

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The kinetics of any adsorption reaction gives more information on the rate at which the adsorbate is taken up by the adsorbent, which is responsible for the residence time of an adsorbate uptake at the adsorbent-aqueous phase interface. This study was aimed at determining the effect of pore size as well as specific surface area (SSA) on the kinetics of the uptake of methyl orange (MO). The basis of the analysis was from data on kinetic models sourced from recent literature. ANOVA of the data revealed that statistical significance was achieved for SSA but not for pore size (at a significance level of 0.05). This called for a more theoretical perspective on the research data. The kinetics constant for micropores is far higher than for the two selected regimes of the mesopore. For the SSA, 100–10 m2/g adsorbents had a higher mean k2 value. This suggested that adsorbents in the SSA range had pore sizes that favour rapid uptake. However, further studies will be needed to gain a better understanding of how SSA affects adsorption kinetics. The study also discussed the technical limitations that could arise due to the use of kinetic model linearisation.

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“…e scarcity of resources and high cost of saffron lead to the frequent occurrence of saffron adulteration in the market, such as plant-derived materials like Zea mays L. (stigma), Chrysanthemum morifolium Ramat. (stigma), Carthamus tinctorius L. (stigma), corn silk, dyed corn stigma, turmeric, gardenia, rubia, calendula and artificial colorants like tartrazine, amaranth, sunset yellow, orange II, and new coccine [8][9][10][11][12][13]. e extracts of gardenia were added to saffron commonly because of the pigments in the extracts were similar to crocetin esters (crocins) present in saffron and thus could be concealed to a greater degree in the saffron [14,15].…”

Section: Introductionmentioning

confidence: 99%

Multivariate Statistical Analysis Uncovers Spectrum–Effect Relationship between HPLC Fingerprints and Antioxidant Activity of Saffron

You

Zhong

et al. 2021

Journal of Chemistry

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Crocus sativus L. is commonly used as functional food and medicinal herb in traditional Chinese medicine. In this study, the spectrum–effect relationship was established between HPLC fingerprints and in vitro antioxidant activity of saffron to improve the quality evaluation method of saffron. The fingerprints of 21 batches of saffron collected from different regions were assessed, and the data were further analyzed by chemometric methods, including similarity analysis, hierarchical clustering analysis, principal component analysis, and orthogonal partial least squares discriminant analysis. The spectrum–effect relationship between fingerprints and antioxidant effect of saffron was analyzed by grey relational analysis and partial least square methods to figure out the antioxidant component of saffron. Thirteen common peaks of 21 batches of saffron were included in the analysis, and peak 3 (picrocrocin), peak 7 (crocin I), and peak 10 (crocin II) were identified as the main active components responsible for antioxidant efficacy. Besides, a multi-index quality control method was developed for simultaneous determination of these three antioxidant components in saffron. Taken together, this study provided new strategies for the quality control and the development of new bioactive products of saffron in the future.

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

Cited by 14 publications

References 21 publications

Nitrogen-Doped Carbon Dots from Averrhoa carambola Fruit Extract as a Fluorescent Probe for Methyl Orange

Nitrogen-Doped Carbon Dots from Averrhoa carambola Fruit Extract as a Fluorescent Probe for Methyl Orange

Do Adsorbent Pore Size and Specific Surface Area Affect The Kinetics of Methyl Orange Aqueous Phase Adsorption?

Multivariate Statistical Analysis Uncovers Spectrum–Effect Relationship between HPLC Fingerprints and Antioxidant Activity of Saffron

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