Qingju Liu

ORCID: 0000-0003-0240-0756
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About
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Research Areas
  • Pesticide Residue Analysis and Safety
  • Advanced biosensing and bioanalysis techniques
  • Advanced Nanomaterials in Catalysis
  • Molecular Sensors and Ion Detection
  • Analytical chemistry methods development
  • Pesticide and Herbicide Environmental Studies
  • Metal-Organic Frameworks: Synthesis and Applications
  • Insect and Pesticide Research
  • Mycotoxins in Agriculture and Food
  • Electrochemical sensors and biosensors
  • Pesticide Exposure and Toxicity
  • Plant Pathogens and Resistance
  • Sulfur Compounds in Biology
  • Biosensors and Analytical Detection
  • Nanocluster Synthesis and Applications
  • Indoor Air Quality and Microbial Exposure

Beijing Academy of Agricultural and Forestry Sciences
2022-2024

Beijing Research Center for Agricultural and Standards and Testing
2018-2021

University of Chinese Academy of Sciences
2016

A fluorescent aptasensor of chlorpyrifos based on terbium(<sc>iii</sc>) metal–organic frameworks and PDDA-aggregated-gold nanoparticles.

10.1039/c9an00943d article EN The Analyst 2019-01-01

The prevalently used immunoassays for fast screening of aftatoxins (AFs) usually cannot meet the requirement simultaneous determination total AFs (aflatoxin B1 + aflatoxin B2 G1 G2) due to deficiency highly group-specific antibodies. This paper describes a two-step chromogenic reaction based method quantitatively detect in rice using colorimetric measurement without antibody. In method, colorless transform into green-colored indophenol products through with sodium hydroxide and...

10.1021/acs.analchem.5b04720 article EN Analytical Chemistry 2016-03-03

A luminescent terbium-based MOF based biosensing system with excellent performance for the stereospecific detection of d -amino acids.

10.1039/d1nj05570d article EN New Journal of Chemistry 2022-01-01

Ethephon (ETH) is a plant growth regulator extensively utilized in agriculture, but its overuse associated with several health issues. However, detecting ETH sensitively and easily the field challenging due to complexity time-consuming operation of current approaches. In this study, we synthesized aluminum-based metal-organic frameworks (CAU-1) as fluorescent probes for detection fruit. exposure enhanced shifted light green fluorescence CAU-1 blue through high absorption phosphate by...

10.1016/j.jsamd.2024.100769 article EN cc-by Journal of Science Advanced Materials and Devices 2024-07-24

Currently known rapid determination of fungicides usually relies on antibody-based immunoassay. This paper reports a simple antibody-free colorimetric assay for chlorothalonil via the inhibition an enzyme-triggered reaction. The enzymatic activity glyceraldehyde-3-phosphate dehydrogenase was significantly inhibited by chlorothalonil, and color change NBT-PMS system induced from NADH formation suppressed, which could be used indirectly to chlorothalonil. limit detection (LOD) 0.05 μM with...

10.1039/c9ra00291j article EN cc-by-nc RSC Advances 2019-01-01

L-Histidine (L-His) is an essential amino acid, which used to synthesize proteins and enzymes. The concentration of L-His in the body controlled regulate tissue growth repair tissues. In this study, a rapid sensitive method was developed for colorimetric L-his detection using Cu2+ ions inhibit oxidation 3,3',5,5'-tetramethylbenzidine (TMB)-H2O2 system. H2O2 can oxidize TMB oxTMB presence copper, change color from colorless (TMB) blue (oxTMB) similar that observed peroxidase. However, because...

10.3389/fchem.2021.773519 article EN cc-by Frontiers in Chemistry 2021-11-23

Prochloraz and its metabolites in strawberries have not been determined until now. Meanwhile, few reports the literature concerned dissipation behavior risk assessment of prochloraz under greenhouse conditions Beijing. A method for determination was developed using QuEChERS combination with ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). recovered from were present concentrations 73.06% to 116.01%, their RSDs ranged 1.12% 9.17%, limits detection 0.1 1 μg kg-1....

10.3390/molecules28227498 article EN cc-by Molecules 2023-11-09
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