Visual determination of malachite green in sea fish samples

Гавриленко, Н. А.; Volgina, Tatyana N.; Pugachev, Evgeniy V.; Гавриленко, М. А.

doi:10.1016/j.foodchem.2018.08.139

Cited by 54 publications

(14 citation statements)

References 25 publications

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“…In view of this, it is necessary to exploit a rapid and practical method in testing MG. Many methods were used in MG measurement, such as surface-enhanced Raman spectroscopy (SERS), − chromatography, spectrophotometry, − etc. Most methods of detecting MG are based on spectrophotometry, such as UV–vis spectrophotometry, but the MG adsorption process by adsorbent usually takes a long time.…”

Section: Introductionmentioning

confidence: 99%

A Europium-based MOF Fluorescent Probe for Efficiently Detecting Malachite Green and Uric Acid

et al. 2020

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Lanthanide (such as Tb and Eu) metal–organic frameworks (MOFs) have been widely used in fluorescent probes because of their multiple coordination modes and brilliant fluorescence characteristic. Many lanthanide MOFs were applied in detecting metal ions, inorganic anions, and small molecules. However, it’s rarely reported that Ln-MOF was devoted to detecting malachite green (MG) and uric acid (UA). We prepared a europium-based metal–organic framework (Eu-TDA) (TDA = 2,5-thiophenedicarboxylic acid group). Luminescence studies demonstrated that Eu-TDA can rapidly detect MG and UA with excellent selectivity and sensitivity, where individual quenching efficiency K sv (MG: 5.8 × 105 M–1; UA: 4.15 × 104 M–1) and detection limit (MG: 0.0221 μM; UA: 0.689 μM) were regarded as the excellent MOF sensors for detecting MG and UA. The quenching of Eu-TDA’s fluorescence emission by MG and UA was likely due to the spectral overlap, energy transfer, and competition. Among 11 metal cations and 14 anions, Eu-TDA can quickly and effectively recognize MG and UA with highly selective and sensitive properties. Our method possesses potential application in detecting UA in human blood and MG in the fishpond.

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Section: Introductionmentioning

confidence: 99%

A Europium-based MOF Fluorescent Probe for Efficiently Detecting Malachite Green and Uric Acid

et al. 2020

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“…To ensure food quality and safety, all kinds of analytical methods are used to determine MG residues and its metabolite in aquatic products and aquatic water, such as mass spectrometry [ 4 ], liquid chromatography [ 5 ], liquid chromatography coupled with tandem mass spectrometry [ 6 ], immunological assays [ 7 ], visual and spectrophotometric determination [ 8 ], surface-enhanced Raman scattering [ 9 ], and molecularly imprinted polymer [ 10 ]. Those mentioned methods are reliable with satisfactory sensitivity, accuracy, and precision, but they also require relevant extraction pretreatment, large-scale instruments, professional experimental skills, and expensive costs [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

Selection and Application of ssDNA Aptamers for Fluorescence Biosensing Detection of Malachite Green

Xie

Chen

Zhao

et al. 2022

Foods

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Malachite green oxalate (MG) is a kind of veterinary drug, which is freely soluble in water and hazardous to aquatic products, resulting in food toxicity and human health problems. The demand for effective and sensitive detection of MG residues is increasing in food safety. In this work, three DNA aptamers MG-36-12/16/17 targeting MG with good affinity (Kd values were 169.78, 71.94, and 102.46 μM, respectively) were obtained by Capture-SELEX. Furthermore, MG-36-12, MG-76-16-6A, and MG-36-17 were found to perform sensitively and specifically to detect MG as a sensing probe in a FRET fluorescent aptasensor, where the FAM-labeled aptamer and GO were employed as efficient energy donor–acceptor pair. The linear range of this aptasensor using aptamer MG-36-12 was from 4 to 1200 ng/mL and the LOD was as low as 1.82 ng/mL. Additionally, the fluorescent assay using aptamer MG-36-17 to detect MG exhibited a linear relationship from 4 to 2000 ng/mL and a LOD of 5.05 ng/mL. Meanwhile, the aptasensor showed high specificity to MG with no cross-reactivity to other veterinary drugs and had a mean recovery of 82.77% to 102.48% in actual water samples from the aquatic product market.

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“…A polymethacrylate matrix was taken to tightly immobilize BCP and allow easy permeation of the analyte. There are good examples of applying PMM for the solid-phase quantification of various species [21][22][23][24][25]. The initial 6.5 pH value of spoiled milk [26] coincides with BCP's pK a value 6.5 ± 0.3 in the PMM.…”

Section: Introductionmentioning

confidence: 90%

Optical pH Sensing in Milk: A Small Puzzle of Indicator Concentrations and the Best Detection Method

2021

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Optical chemical sensors can yield distinctively different responses that are dependent on the method applied for readout and evaluation. We therefore present a comprehensive study on the pH determined non-continuously with optical sensors in real milk samples by either photometry or colorimetry (via the RGB-readout of digital images) compared to the pH values obtained electrochemically by potentiometry. Additionally, the photometric determination of pH was conducted with single-wavelength and a dual wavelength ratiometric evaluation of the absorbance. It was found that both the precision and accuracy of the pH determined by photometry benefit from lower concentrations of bromocresol purple, which served as the pH indicator inside the sensor membrane. A further improvement is obtained by the ratiometric evaluation of the photometric sensor response. The pH values obtained from the colorimetric evaluation, however, gain in precision and accuracy if a higher concentration of the indicator is immobilized inside the sensor membrane. This has a major impact on the future fabrication of optical pH sensor membranes because they can be better tuned to match to the most precise and accurate range of the planned detection method.

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Visual determination of malachite green in sea fish samples

Cited by 54 publications

References 25 publications

A Europium-based MOF Fluorescent Probe for Efficiently Detecting Malachite Green and Uric Acid

A Europium-based MOF Fluorescent Probe for Efficiently Detecting Malachite Green and Uric Acid

Selection and Application of ssDNA Aptamers for Fluorescence Biosensing Detection of Malachite Green

Optical pH Sensing in Milk: A Small Puzzle of Indicator Concentrations and the Best Detection Method

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