A5048559169- Toxic Organic Pollutants Impact
- Pesticide Residue Analysis and Safety
- Analytical chemistry methods development
- Carcinogens and Genotoxicity Assessment
- Marine Biology and Environmental Chemistry
- Isotope Analysis in Ecology
- Water Treatment and Disinfection
- Meat and Animal Product Quality
- Water Resources and Management
- Effects and risks of endocrine disrupting chemicals
- Organometallic Compounds Synthesis and Characterization
- Plant Surface Properties and Treatments
- Catalytic Processes in Materials Science
- Membrane Separation Technologies
- Horticultural and Viticultural Research
- Microplastics and Plastic Pollution
- Biopolymer Synthesis and Applications
- Microbial Community Ecology and Physiology
- Environmental Chemistry and Analysis
- Postharvest Quality and Shelf Life Management
- Insect and Pesticide Research
- Chemical Analysis and Environmental Impact
- Mercury impact and mitigation studies
- Mycotoxins in Agriculture and Food
- Advanced oxidation water treatment
Qingdao Agricultural University
2024-2025
Health Canada
1985-2006
Chicken eggs categorised as conventional, omega-3 enriched, free range and organic were collected at grading stations in three regions of Canada between 2005 2006. Free run eggs, which only available for collection from two regions, also sampled during this time frame. Egg yolks each these egg types (n = 162) analysed to determine brominated flame retardant levels, specifically polybrominated diphenyl ethers (PBDEs) hexabromocyclododecane (HBCD). PBDEs detected 100% the 162 samples tested,...
Abstract The Canadian Total Diet Study is a national survey to determine the level of chemical contaminants in food supply. Food samples were collected from Whitehorse, Yukon, supermarkets as part study 1998. Whitehorse was chosen sampling centre, despite its small population (n = 19 000), if residue levels different foods available northern communities relative observed previous studies more populated south. Foods prepared for consumption before pesticide analysis. Residue most similar...
Market basket samples representative of food from six Canadian cities were surveyed 1992 to 1996. Fifty composites fatty foods, prepared for consumption analysed 40 PCB congeners by gas chromatography-mass spectrometry. Fish and butter contained the highest total concentrations, while milk infant foods lowest. The dairy meat major contributors intake 5.7 ng/kg/day, TEQ (2,3,7,8-tetrachloro-p-dibenzodioxin equivalent) 0.11 pg/kg/day. pattern was similar different groups with exception fish,...
A previously published method for the determination of deoxynivalenol (DON) and nivalenol (NIV) in grains by capillary gas chromatography (GC) with electron-capture detection (ECD) has been modified to include HT-2 toxin (HT-2), T-2 (T-2) diacetoxyscirpenol (DAS). Recoveries five trichothecenes from wheat averaged 71-92% range 0.8-4 micrograms/g. Detection or quantitation limits found two laboratories were 0.02 0.4 micrograms/g, those DAS at high end this range. The proved practical use...
Extraction studies on butyl‐ and octyltins were conducted with three poly(vinyl chloride) (PVC) product types: clear food container, rigid pipe flexible membrane. Three solvents, tetrahydrofuran, xylene methylene chloride evaluated for extraction efficiency. Methylene extracted more than 97% of the total extractable organotin in two extractions resulted highest recoveries analytes from all PVC products. Method detection limits ranged 0.3 to 0.9 μg alkyltin/g PVC. The mean precision method is...
Abstract Iodoacetic and chloroiodoacetic acids were formed when municipal chlorinated tap water was allowed to react with iodized (with potassium iodide) table salt or iodide itself. acid recently shown be a potent cytotoxic genotoxic agent. For analysis, samples extracted t-amyl methyl ether converted the corresponding esters using methanol sulfuric acid. The concentration of iodoacetic determined by gas chromatography-mass spectrometry (GC-MS) an authentic standard. identities further...
Market basket food samples from six Canadian cities collected 1992 to 1996 were analysed for pesticide residues. One hundred and thirty-six composites prepared each city, representing 99% of the diet. Residues found most frequently in peanut butter butter. DDE, malathion captan occurred frequently, while fungicides chlorothalonil, dicloran present highest concentrations. Processed commodities contained fewer residues at lower concentrations than raw products. No detected either milk or...
An extraction method for butyltin, cyclohexyltin, octyltin and phenyltin compounds in wines was developed using 0.05% tropolone 75% diethyl ether/pentane. Recoveries averaged 96.8% (range 78-121%). Methyl derivatives made by Grignard reaction were quantitated gas chromatography (GC)-atomic absorption spectrometry (AAS). Twenty-nine of the 90 samples (32.2%) tested contained at least one analytes. Mono- diocyltin found sample only, levels 2.41 0.12 ng/ml respectively. Dibutyltin ranged from <...