Density-adjusted liquid-phase microextraction with smartphone digital image colorimetry to determine parathion-methyl in water, fruit juice, vinegar, and fermented liquor

Bi, Xinyuan; Jiang, Haijuan; Guo, Xingle; Wang, Min; Niu, Yu; Jia, Liyan; Jing, Xu

doi:10.1039/d2ra02760g

Cited by 3 publications

(2 citation statements)

References 35 publications

(40 reference statements)

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“…27 Typically, one of the channels is more intense than the others; this channel is chosen for quantication by translating the pixel intensity of the image into a value that is correlated with the analyte concentration. 28 SDIC has opened colorimetric analysis to low-budget laboratories including a wider range of researchers and students 29 and has been applied in the analysis of a variety of samples such as food, 28,[30][31][32] environmental samples, 33 alloys, 34,35 drugs [36][37][38] and vitreous humor. 39 In this study, we expand the applicability of SDIC to the quantication of serum proteins.…”

Section: Introductionmentioning

confidence: 99%

“…SDIC has opened colorimetric analysis to low-budget laboratories including a wider range of researchers and students 29 and has been applied in the analysis of a variety of samples such as food, 28,30–32 environmental samples, 33 alloys, 34,35 drugs 36–38 and vitreous humor. 39 In this study, we expand the applicability of SDIC to the quantification of serum proteins.…”

Section: Introductionmentioning

confidence: 99%

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Smartphone digital image colorimetry for quantification of serum proteins

Markus,

Dalmizrak,

Edebal

et al. 2023

Anal. Methods

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Smartphone digital image colorimetry for quantification of serum proteins

Markus,

Dalmizrak,

Edebal

et al. 2023

Anal. Methods

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Deep Eutectic Solvent Liquid-Liquid Microextraction Prior to Smartphone Digital Image Colorimetry for the Determination of Iodate in Table Salt

Caleb,

Markus,

Venn

et al. 2024

Analytical Letters

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A Rapid and Easy Procedure of Enzyme Biosensor based on Nitrogen-Doped Graphene for Detection of Methyl Parathion in CHM

Sun,

Yu,

et al. 2024

J. Electrochem. Soc.

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Methyl parathion (MP), an organophosphorus pesticide that is frequently used to control pests during the planting process of Chinese herbal medicine (CHM), has been used without sufficient control, leading to excessive residues on the surface of CHM, which has a serious impact on the quality and safety of CHM and their preparations. Consequently, it is crucial to carefully control MP during the cultivation, processing, and manufacture of CHM. Based on this, nitrogen-doped graphene (N-Gr) with a high conductivity and chitosan (CS) with good stability were used to modify the glassy carbon electrode (GCE). Subsequently, the prussian blue (PB) with catalytic activity and gold nanoparticles (AuNPs) with excellent biocompatibility were deposited by the electrodeposition method to form the AuNPs/PB/CS@N-Gr/GCE. Then, the acetylcholinesterase (AChE) was effectively immobilized on the electrode surface by covalent bonding between AuNPs and AChE through gold-sulfhydryl bonds. Finally, a rapid and easy procedure of enzyme biosensor (AChE/AuNPs/PB/CS@N-Gr/GCE) for sensitive detection of MP pesticide residues was fabricated. Herein, PB catalyzes the redox reaction of thiocholine, which is produced when acetylthiocholine iodide (ATCHI) undergoes efficient hydrolysis catalyzed by AChE. This process effectively promoted electron transfer, amplifying the sensor’s response signal. After the experimental conditions are optimized, the limit of detection (LOD) for MP is found to be 9.47 × 10−5 μg ml−1. Exhibits a good linear relationship within the concentration range of 1 × 10−3 μg ml−1 ∼ 1 × 101 μg ml−1. Significantly, the fabricated enzyme biosensor excels in swiftly and sensitively detecting trace amounts of MP in real examples. Furthermore, it exhibits robust stability and reproducibility. The excellent performance of this enzyme biosensor not only offers a rapid and easy way to identify and find minute amounts of trace MP pesticide residues in CHM, but also serves as a technical guide for the creation of new, portable, and on-site pesticide residue detection technology for law enforcement.

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Density-adjusted liquid-phase microextraction with smartphone digital image colorimetry to determine parathion-methyl in water, fruit juice, vinegar, and fermented liquor

Abstract: Schematic representation of the density-adjusted LPME-SDIC.

Cited by 3 publications

References 35 publications

Smartphone digital image colorimetry for quantification of serum proteins

Smartphone digital image colorimetry for quantification of serum proteins

Deep Eutectic Solvent Liquid-Liquid Microextraction Prior to Smartphone Digital Image Colorimetry for the Determination of Iodate in Table Salt

A Rapid and Easy Procedure of Enzyme Biosensor based on Nitrogen-Doped Graphene for Detection of Methyl Parathion in CHM

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