A5100682491- Pesticide Residue Analysis and Safety
- Insect and Pesticide Research
- Analytical chemistry methods development
- Pesticide Exposure and Toxicity
- Per- and polyfluoroalkyl substances research
- Analytical Chemistry and Chromatography
- Birth, Development, and Health
- Pesticide and Herbicide Environmental Studies
- Toxic Organic Pollutants Impact
- Pharmacological Effects and Assays
- Spectroscopy and Laser Applications
- Pharmaceutical and Antibiotic Environmental Impacts
- Healthcare and Venom Research
- Spectroscopy and Chemometric Analyses
- Insect-Plant Interactions and Control
- Metabolomics and Mass Spectrometry Studies
- Environmental Toxicology and Ecotoxicology
- Veterinary Medicine and Surgery
- Agricultural safety and regulations
- GABA and Rice Research
- Ginseng Biological Effects and Applications
- Ecology and Conservation Studies
- Carcinogens and Genotoxicity Assessment
- Advancements in Transdermal Drug Delivery
- Pharmacological Effects of Natural Compounds
University of Massachusetts Amherst
2019-2024
Seoul National University
2014-2021
Ministry of Food and Drug Safety
2021
Ajou University
2003
A multiresidue method for the simultaneous and rapid analysis of 360 pesticides in representative agricultural produce (brown rice, orange, spinach, potato) was developed using a modified QuEChERS procedure combined with gas chromatography–tandem mass spectrometry (GC-MS/MS). Selected reaction monitoring transition parameters (e.g., collision energy, precursor product ions) MS/MS were optimized to achieve best selectivity sensitivity wide range GC-amenable pesticides. short (20 m) microbore...
A screening method for simultaneous analysis of 379 pesticides in human serum was developed using liquid chromatography–tandem mass spectrometry (LC–MS/MS). Electrospray ionization with positive/negative switching mode LC–MS/MS adopted, and scheduled multiple reaction monitoring each target compound established. The limit quantitation 10 ng/mL 94.5% the total pesticides, correlation coefficients calibration were ≥0.990 93.9% pesticides. For sample preparation, scaled-down QuEChERS used....
Multiresidual pesticide analysis in hair can provide useful perspectives on the relationship between pesticides and human health. To establish a rapid simultaneous analytical method using LC-MS/MS GC-MS/MS, optimization of pulverization, extraction solvent purification with dispersive SPE was performed for 300 pesticides. Hair pulverization standardized ball mill, at 30 Hz 20 min (10 twice), 3-mm diameter beads. For extraction, 0.1% formic acid acetonitrile selected, PSA d-SPE chosen...
Background: Drinking water contamination related to the use of aqueous film-forming foam (AFFF) has been documented at hundreds military bases, airports, and firefighter training facilities. AFFF historically contained high levels long-chain per- polyfluoroalkyl substances (PFAS), which pose serious health concerns. However, composition toxicity legacy mixtures are unknown, presenting great uncertainties in risk assessment affected communities. Objectives: This study aimed determine...
The dissipation behaviors of acetamiprid and chlorantraniliprole in kimchi cabbages were studied under open-field conditions. A simple rapid analytical method was developed using ultra-high performance liquid chromatography coupled with tandem mass spectrometry (UHPLC-MS/MS). multiple reaction monitoring (MRM) conditions two pesticides optimized to quantify identify the pesticide residues. Sample preparation performed by QuEChERS (quick, easy, cheap, effective, rugged, safe) method. Average...
The analysis of pesticides in food products requires accurate measurements for which standardised protocols have been developed. This paper reports the validation QuEChERS (quick, easy, cheap, effective, rugged, and safe)-based methods applied to three different samples (brown rice, red pepper mandarin orange) analysed using gas chromatography-tandem mass spectrometry (GC-MS/MS). analytical used measure 113 pesticides, including various insecticides, fungicides herbicides, was conducted...
수박 시설 재배에서 acetamiprid 수화제의 살포액 조제 및 살포 시 농작업자의 피부 호흡 노출량을 측정하였다. 국내 최초로 노출은 전신노출법을 이용하였으며, 폴리에스테르와 면이 함유된 겉작업복과 면으로 된 내복을 사용하여 손 nitrile 장갑을 끼고 조제/살포 후 장갑 손을 세척하여 측정하였고, 머리의 세척액으로 적신 거즈로 얼굴/목을 닦아서 개인용 공기펌프와 IOM sampler (glass fiber filter)를 작업자 어깨에 고정하여 2 L/min으로 공기를 포집하여 분석법의 정량한계는 2.5 ng/mL이었고, 각 노출 시료의 matrix matched 표준용액의 직선성은 0.99 이상이었다. 재현성은 C.V 8.7% 이하였으며, 노출시료의 회수율은 70~119%, 포장회수율은 77~95%이었다. 노출량(<TEX>$229.7{\mu}g$</TEX>)이 살포시 노출량(<TEX>$20.9{\mu}g$</TEX>)의 10배 이상의 결과를 보였다. 전체 노출량은...
The dissipation patterns of cyantraniliprole and its metabolite IN-J9Z38 were investigated using proso millet (Panicum miliaceum) under open-field conditions to establish a pre-harvest interval. A simple sensitive analytical method was developed for analyzing residues ultra-high performance liquid chromatography coupled with tandem mass spectrometry (UHPLC-MS/MS) multiple reaction monitoring target compounds. validated in terms the instrumental limit quantitation, linearity, accuracy,...
A multiresidue analysis method for the simultaneous determination of 203 pesticides in soybean was developed using solid-phase extraction (SPE) and gas chromatography–tandem mass spectrometry (GC–MS/MS). Scheduled multiple reaction monitoring by GC–MS/MS optimized electron ionization mode. The target satisfied limit quantitation below 0.01 mg/kg, an excellent instrumental repeatability obtained. calibration curve correlation coefficients (r2) 201 (99.0%) were ≥ 0.990. Multiclass Pesticide...
Abstract A quantitative analysis of ginsenoside is very important for ginseng studies because each shows different medical activity and metabolic pathway. In this study, a rapid, simultaneous, 26 ginsenosides (Rb1, Rb2, Rc, Rd, Re, Rf, Rg1, Rg2(R), Rg2(S), Rg3(S), Rg3(R), Rg5, Rg6, Rh1(R), Rh1(S), Rh2(R), Rh2(S), F1, F2, F3, F4, K, Mc, PPT(S), XVII, Y) in white, red Panax was established using multiple reaction monitoring (MRM) mode on ultra-high-performance liquid chromatography-tandem mass...
Abstract The dissipation of ethoprophos and tricyclazole in soil their translocation tendency to spinach were investigated. Prior field trials, the analytical method for determination these pesticide residues was optimized validated on spinach. trial conducted under greenhouse conditions two different pretreatment periods with pesticides. After treating pesticides 30 (PBI-30) 60 days (PBI-60) before seeding, samples collected study soil. Spinach harvested from soil, 50% 100% mature...
Agricultural workers exposed to pesticides can experience adverse health impacts depending on toxicity and exposure amount. Whole-body dosimetry (WBD) is the most reliable, practical, realistic method for measuring exposure. Since validation of analytical experimental methodologies critical quantitative determination exposure, we conducted a procedure design an essential protocol WBD studies. Using fungicide kresoxim-methyl, matrix-matched standards were prepared with various matrices...
A simultaneous analytical method for the organophosphorus insecticide fenthion and its five metabolites (fenthion oxon, oxon sulfoxide, sulfone, sulfone) was developed based on ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS). Five matrices (brown rice, chili pepper, orange, potato, soybean) were selected to validate method. The target compounds analyzed using positive electrospray ionization in multiple reaction monitoring mode. For best sensitivity regard...
For more rapid and sensitive simultaneous analysis of a 356 pesticide multiresidues by gas chromatography–tandem mass spectrometry (GC–MS/MS), microbore (20 m length × 0.18 mm i.d.) column, instead the conventional narrow bore column (30 0.25 i.d.), pulsed pressure injection (PPI) were evaluated in this study. An time 35.2 min with was greatly reduced to 17.8 column. Retention times all target compounds on new adjusted using automated adjustment retention function. The gave significantly...