Identification of N-methylaniline based on azo coupling reaction by combining TLC with SERRS

Li, Li; Xu, Feng; Sun, Guangai; Sun, Mingrui; Shou-shi, Jia; Li, Hongmei; Xu, Tao; Zhang, Honglian; Wang, Yan; Guo, Yue; Liu, Taohua

doi:10.1016/j.saa.2021.119490

Cited by 6 publications

(4 citation statements)

References 26 publications

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“…SERS technology provides molecular fingerprints with high-specificity and high-sensitivity spectral features and has been widely applied in the field of analysis. For example, SERS technology can be used for the specific detection of quinolone residues when harmful residues have been preliminary separated in dietary supplements or food using TLC [ 14 , 15 , 16 , 17 , 18 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Rapid Limit Test of Eight Quinolone Residues in Food Based on TLC-SERS, a New Limit Test Method

Zhang,

et al. 2023

Molecules

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Residual quinolones in food that exceed their maximum residue limit (MRL) are harmful to human health. However, the existing methods used for testing these residues have limitations; so, we developed a new limit test method called TLC-SERS to rapidly determine the levels of residues of the following: enrofloxacin (A), ciprofloxacin (B), ofloxacin (C), fleroxacin (D), sparfloxacin (E), enoxacin (F), gatifloxacin (G), and nadifloxacin (H). The residues ware preliminarily separated via TLC. The tested compounds’ position on a thin-layer plate were labeled using their relative Rf under 254 nm ultraviolet light, and an appropriate amount of nanometer silver solution was added to the position. The silver on the plate was irradiated with a 532 nm laser to obtain the SERSs of the compounds. The results show significant differences in the SERS of the eight quinolones: the LODs of H, A, D, E, C, G, F, and B were 9.0, 12.6, 8.9, 19.0, 8.0, 8.7, 19.0, and 12.6 ng/mL, respectively; and the RSD was ≤4.9% for the SERS of each quinolone. The limit test results of 20 samples are consistent with those obtained via UPLC–MS/MS. The results indicate that TLC-SERS is a specific, sensitive, stable, and accurate method, providing a new reference for the rapid limit test of harmful residues in foods.

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Section: Introductionmentioning

confidence: 99%

Rapid Limit Test of Eight Quinolone Residues in Food Based on TLC-SERS, a New Limit Test Method

Zhang,

et al. 2023

Molecules

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“…For the determination of azo dyes, high performance liquid chromatography (HPLC) [ 15 ], thin-layer chromatography [ 16 ], gas chromatography-mass spectrometry (GC–MS) [ 17 ], and liquid chromatography tandem mass spectrometry (LC-MS/MS) [ 18 ] have been reported in the literature. However, most of these instruments require expert users and their costs are quite high [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Combination of smartphone digital image colorimetry and UV-Vis spectrophotometry as detection systems with solidified floating organic drop microextraction as preconcentration method for the quantification of methyl red in wastewater samples

BOMBOM,

GİRGİN,

ZAMAN

et al. 2023

Turkish Journal of Chemistry

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In this study, a portable smartphone-based digital image colorimetric system (SDIC) was designed and integrated with a solidified floating organic drop microextraction method (SFODME) for the quantification of methyl red in textile wastewater samples. The RGB (red, green, and blue) data were evaluated for each captured image, and the green channel was selected for quantification due to its linear response for the analyte. Under optimal conditions, an acceptable linear range was recorded for the analyte. The proposed method recorded a limit of detection (LOD) value of 0.046 mg/L. The developed microextraction method was also combined with UV-Vis spectrophotometry, which recorded an LOD value of 0.012 mg/L. Real sample analysis was carried out with textile wastewater samples to check the applicability/accuracy of the developed method, using a matrix matching calibration strategy to enhance quantification accuracy. Satisfactory percent recoveries in the range of 93.3%–114.3% and 92%–92.7% were recorded for the SFODME-SDIC and SFODME-UV methods, respectively.

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“…SERS technology provides molecular fingerprints with highspecificity and high-sensitivity spectral features and has been widely applied in the field of analysis. For example, SERS technology can be used for the specific detection of quinolone residues when harmful residues have been preliminary separated in dietary supplements or food using TLC [14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Rapid Limit Test of the Eight Quinolones Residue in the Food Based on TLC-SERS

Zhang,

et al. 2023

Preprint

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Numerous studies have shown that quinolones residues in the foods exceeding the MRL is harmful to the human health. There are some limitations in the existing methods for the residues, so we developed a new limit test method (TLC-SERS) to rapidly determine following residues: enrofloxacin(A), ciprofloxacin (B), ofloxacin(C), fleroxacin(D), sparfloxacin(E), enoxacin(F), gatifloxacin(G) and nadifloxacin(H). The residues can be preliminarily separated by TLC. Labeling the tested compounds’ position on the thin layer plate by their relative Rf under 254nm ultraviolet, and an appropriate amount of nanometer silver solution should be added to the position. The silver on the plate should be irradiated with 532nm laser to obtain SERS of the compounds. The results showed a significant differences of the 8 quinolones’ SERS; the LOD of the H, A, D, E, C, G, F and B were orderly 9.0, 12.6, 8.0, 19.0, 8.0, 8.4, 9.0 and 12.6 ng/mL, and the RSD≤4.9% for SERS of each quinolones.The limit test results of the 20 samples was consistent with that determined by the UPLC–MS/MS. The above results indicate that the TLC-SERS is specific, sensitive, stable, and accurate, providing a new reference for the rapid limit test of harmful residues in foods.

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Identification of N-methylaniline based on azo coupling reaction by combining TLC with SERRS

Cited by 6 publications

References 26 publications

Rapid Limit Test of Eight Quinolone Residues in Food Based on TLC-SERS, a New Limit Test Method

Rapid Limit Test of Eight Quinolone Residues in Food Based on TLC-SERS, a New Limit Test Method

Combination of smartphone digital image colorimetry and UV-Vis spectrophotometry as detection systems with solidified floating organic drop microextraction as preconcentration method for the quantification of methyl red in wastewater samples

Rapid Limit Test of the Eight Quinolones Residue in the Food Based on TLC-SERS

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