Dorothea F K Rawn

Summary

Affiliation: Health Canada
Country: Canada

Publications

  1. ncbi request reprint Anatoxin-a and its metabolites in blue-green algae food supplements from Canada and Portugal
    Dorothea F K Rawn
    Food Research Division, Food Directorate, Health Products and Food Branch, Health Canada, 2203D, 251 Sir Frederick Banting Driveway, Tunney s Pasture, Ottawa, Ontario, Canada K1A 0K9
    J Food Prot 70:776-9. 2007
  2. doi request reprint Persistent organic pollutants in fish oil supplements on the Canadian market: polychlorinated biphenyls and organochlorine insecticides
    Dorothea F K Rawn
    Sir Frederick Banting Research Centre, Tunney s Pasture, Ottawa, ON, Canada
    J Food Sci 74:T14-9. 2009
  3. ncbi request reprint Canadian Total Diet Study in 1998: pesticide levels in foods from Whitehorse, Yukon, Canada, and corresponding dietary intake estimates
    D F Rawn
    Food Research Division 2203D, Bureau of Chemical Safety, Health Products and Food Branch, Health Canada, Tunney s Pasture, Ottawa, ON, Canada K1A 0L2
    Food Addit Contam 21:232-50. 2004
  4. doi request reprint Evaluation of surface plasmon resonance relative to high pressure liquid chromatography for the determination of paralytic shellfish toxins
    Dorothea F K Rawn
    Food Research Division, Bureau of Chemical Safety, Health Products and Food Branch, Health Canada, Sir Frederick Banting Research Centre, Tunney s Pasture, Ottawa, ON, Canada K1A 0K9
    J Agric Food Chem 57:10022-31. 2009
  5. doi request reprint Effects of postharvest preparation on organophosphate insecticide residues in apples
    Dorothea F K Rawn
    Food Research Division, Bureau of Chemical Safety, Health Products and Food Branch, Health Canada, 2203D, Tunney s Pasture, Ottawa, ON, Canada K1A 0K9
    J Agric Food Chem 56:916-21. 2008
  6. ncbi request reprint Variability in captan residues in apples from a Canadian orchard
    Dorothea F K Rawn
    Food Research Division, Bureau of Chemical Safety, Health Products and Food Branch, Health Canada 2203E, Tunney s Pasture, Ottawa, ON, Canada K1A 0L2
    Food Addit Contam 24:149-55. 2007
  7. ncbi request reprint N-methyl carbamate pesticide residues in conventional and organic infant foods available on the Canadian retail market, 2001-03
    D F K Rawn
    Food Research Division, Bureau of Chemical Safety, Health Products and Food Branch, Health Canada, Address Locator 2203D, Tunney s Pasture, Ottawa, ON K1A 0L2, Canada
    Food Addit Contam 23:651-9. 2006
  8. ncbi request reprint Improved method for the determination of anatoxin-a and two of its metabolites in blue-green algae using liquid chromatography with fluorescence detection
    Dorothea F K Rawn
    Health Canada, Bureau of Chemical Safety, Food Research Division, Health Products and Food Branch, Address Locator 2203D, Tunney s Pasture, Ottawa, ON, Canada, K1A 0L2
    J AOAC Int 88:1741-7. 2005
  9. ncbi request reprint Organophosphate levels in apple composites and individual apples from a treated Canadian orchard
    Dorothea F K Rawn
    Food Research Division, Bureau of Chemical Safety, Health Products and Food Branch, Health Canada, 2203D Tunney s Pasture, Ottawa, ON, Canada K1A 0L2
    J Agric Food Chem 54:1943-8. 2006
  10. ncbi request reprint Confirmation of okadaic acid, dinophysistoxin-1 and dinophysistoxin-2 in shellfish as their anthrylmethyl derivatives using UV radiation
    Dorothea F K Rawn
    Food Research Division, Bureau of Chemical Safety, Health Products and Food Branch, Health Canada, Sir Frederick Banting Research Centre, 2203D, Tunney s Pasture, Ottawa, Ont, Canada K1A 0L2
    J Chromatogr A 1080:148-56. 2005

Detail Information

Publications21

  1. ncbi request reprint Anatoxin-a and its metabolites in blue-green algae food supplements from Canada and Portugal
    Dorothea F K Rawn
    Food Research Division, Food Directorate, Health Products and Food Branch, Health Canada, 2203D, 251 Sir Frederick Banting Driveway, Tunney s Pasture, Ottawa, Ontario, Canada K1A 0K9
    J Food Prot 70:776-9. 2007
    ..3 to 1.5, 0.3 to 0.8, and 0.5 to 0.8 pg on the column, respectively). Because of the higher specificity of the LC-MS-MS analysis, all tested food supplement samples were considered free of anatoxin-a and its transformation products...
  2. doi request reprint Persistent organic pollutants in fish oil supplements on the Canadian market: polychlorinated biphenyls and organochlorine insecticides
    Dorothea F K Rawn
    Sir Frederick Banting Research Centre, Tunney s Pasture, Ottawa, ON, Canada
    J Food Sci 74:T14-9. 2009
    ..Average SigmaPCB and SigmaDDT intakes were calculated to be 736 +/- 2840 ng/d and 304 +/- 948 ng/d, respectively...
  3. ncbi request reprint Canadian Total Diet Study in 1998: pesticide levels in foods from Whitehorse, Yukon, Canada, and corresponding dietary intake estimates
    D F Rawn
    Food Research Division 2203D, Bureau of Chemical Safety, Health Products and Food Branch, Health Canada, Tunney s Pasture, Ottawa, ON, Canada K1A 0L2
    Food Addit Contam 21:232-50. 2004
    ..No dietary intakes above the acceptable daily intakes, however, were observed for any of the 39 pesticides investigated in any age-sex category, where an acceptable daily intake has been proposed...
  4. doi request reprint Evaluation of surface plasmon resonance relative to high pressure liquid chromatography for the determination of paralytic shellfish toxins
    Dorothea F K Rawn
    Food Research Division, Bureau of Chemical Safety, Health Products and Food Branch, Health Canada, Sir Frederick Banting Research Centre, Tunney s Pasture, Ottawa, ON, Canada K1A 0K9
    J Agric Food Chem 57:10022-31. 2009
    ..SPR may be applicable as a screening technique, although improved antibody response to the N-1-hydroxylated PSTs is required prior to this method being safely used for routine testing...
  5. doi request reprint Effects of postharvest preparation on organophosphate insecticide residues in apples
    Dorothea F K Rawn
    Food Research Division, Bureau of Chemical Safety, Health Products and Food Branch, Health Canada, 2203D, Tunney s Pasture, Ottawa, ON, Canada K1A 0K9
    J Agric Food Chem 56:916-21. 2008
    ..Rinsing and peeling of apples resulted in a 74.5-97.9% reduction in OP residues, while rinsing alone lowered mean concentrations by 13.5-28.7% relative to apples that received no postharvest preparation...
  6. ncbi request reprint Variability in captan residues in apples from a Canadian orchard
    Dorothea F K Rawn
    Food Research Division, Bureau of Chemical Safety, Health Products and Food Branch, Health Canada 2203E, Tunney s Pasture, Ottawa, ON, Canada K1A 0L2
    Food Addit Contam 24:149-55. 2007
    ..Composite samples ranged in concentration from 166 to 2620 ng g-1. The greatest uncertainty associated with the measured concentrations was due to variability among apples rather than the measurement of residue levels...
  7. ncbi request reprint N-methyl carbamate pesticide residues in conventional and organic infant foods available on the Canadian retail market, 2001-03
    D F K Rawn
    Food Research Division, Bureau of Chemical Safety, Health Products and Food Branch, Health Canada, Address Locator 2203D, Tunney s Pasture, Ottawa, ON K1A 0L2, Canada
    Food Addit Contam 23:651-9. 2006
    ..Dietary intakes of carbaryl and methomyl based on the consumption of infant foods tested ranged between 0.2-343 and 0.4-2.0 ng kg-1 body weight day-1, respectively...
  8. ncbi request reprint Improved method for the determination of anatoxin-a and two of its metabolites in blue-green algae using liquid chromatography with fluorescence detection
    Dorothea F K Rawn
    Health Canada, Bureau of Chemical Safety, Food Research Division, Health Products and Food Branch, Address Locator 2203D, Tunney s Pasture, Ottawa, ON, Canada, K1A 0L2
    J AOAC Int 88:1741-7. 2005
    ..The detection limits obtained for the 2 degradation products dihydroanatoxin-a and epoxyanatoxin-a in BGA extracts were similarly low (55 and 65 microg/kg, respectively)...
  9. ncbi request reprint Organophosphate levels in apple composites and individual apples from a treated Canadian orchard
    Dorothea F K Rawn
    Food Research Division, Bureau of Chemical Safety, Health Products and Food Branch, Health Canada, 2203D Tunney s Pasture, Ottawa, ON, Canada K1A 0L2
    J Agric Food Chem 54:1943-8. 2006
    ..Variability factors ranged from 2 to 19 for all compounds observed in this study. Composite samples may not accurately reflect the extremes of exposure from consumption of single servings of apples...
  10. ncbi request reprint Confirmation of okadaic acid, dinophysistoxin-1 and dinophysistoxin-2 in shellfish as their anthrylmethyl derivatives using UV radiation
    Dorothea F K Rawn
    Food Research Division, Bureau of Chemical Safety, Health Products and Food Branch, Health Canada, Sir Frederick Banting Research Centre, 2203D, Tunney s Pasture, Ottawa, Ont, Canada K1A 0L2
    J Chromatogr A 1080:148-56. 2005
    ..UV radiation is, therefore, proposed as a rapid and simple confirmation technique for these DSP in mussel samples...
  11. ncbi request reprint PCB, PCDD and PCDF residues in fin and non-fin fish products from the Canadian retail market 2002
    Dorothea F K Rawn
    Food Research Division, Bureau of Chemical Safety, Health Products and Food Branch, Health Canada, Ottawa, ON, Canada, K1A 0L2
    Sci Total Environ 359:101-10. 2006
    ..SigmaPCB levels were below the Canadian guideline value for PCBs in fish and fish products (2000 ng/g). Similarly, 2,3,7,8-TCDD levels in all fish products were below the Canadian guideline value (0.020 ng/g)...
  12. ncbi request reprint N-methyl carbamate concentrations and dietary intake estimates for apple and grape juices available on the retail market in Canada
    D F K Rawn
    Food Research Division Bureau of Chemical Safety, Health Products and Food Branch, Health Canada, 2203D, Tunney s Pasture, Ottawa, ON, Canada, K1A 0L2
    Food Addit Contam 21:555-63. 2004
    ..Carbaryl short-term intake estimates were calculated and all were below the proposed acute reference doses...
  13. doi request reprint Persistent organic pollutants in fish oil supplements on the canadian market: polychlorinated dibenzo-p-dioxins, dibenzofurans, and polybrominated diphenyl ethers
    D F K Rawn
    Food Research Div, Bureau of Chemical Safety, Health Products and Food Branch, Health Canada
    J Food Sci 74:T31-6. 2009
    ..Average PCDD/F and PBDE intake estimates, based on consumption of maximum supplement dose following product label recommendations, were 4.32 pg TEQ/d and 25.1 ng/d lipid, respectively...
  14. doi request reprint The impact of production type and region on polychlorinated biphenyl (PCB), polychlorinated dibenzo-p-dioxin and dibenzofuran (PCDD/F) concentrations in Canadian chicken egg yolks
    Dorothea F K Rawn
    Food Research Division, Bureau of Chemical Safety, Health Products and Food Branch, Health Canada, Tunney s Pasture, Ottawa, ON, Canada K1A 0K9
    Chemosphere 89:929-35. 2012
    ..Median PCB dietary intake estimates based on consumption of eggs were less than 10 ng d(-1) while median PCDD/F intakes were less than 45 pg d(-1)...
  15. doi request reprint Brominated flame retardant concentrations in sera from the Canadian Health Measures Survey (CHMS) from 2007 to 2009
    Dorothea F K Rawn
    Food Research Division, Bureau of Chemical Safety, Health Products and Food Branch, Health Canada, Sir Frederick Banting Research Centre, 251 Sir Frederick Banting Driveway, Address Locator 2203C, Tunney s Pasture, Ottawa, ON K1A 0K9, Canada Electronic address
    Environ Int 63:26-34. 2014
    ..No differences in ∑HBCD concentration were associated with age or sex. This dataset represents the first national data describing HBCD isomers and some PBDEs (e.g., 183, 209) in Canadians. ..
  16. ncbi request reprint Liquid chromatographic determination of the cyanobacterial toxin beta-n-methylamino-L-alanine in algae food supplements, freshwater fish, and bottled water
    Peter M Scott
    Bureau of Chemical Safety, Health Canada, Banting Building, AL 2203D, Ottawa, Ontario K1A 0K9, Canada
    J Food Prot 72:1769-73. 2009
    ..Recoveries of BMAA from spiked extracts of hydrolyzed protein from BGA supplements and fish ranged from 66 to 83%. The cleanup developed provides a useful method for surveying foods and supplements for BMAA and protein-bound BMAA...
  17. doi request reprint PCDD/F and PCB concentrations in sera from the Canadian Health Measures Survey (CHMS) from 2007 to 2009
    Dorothea F K Rawn
    Food Research Division, Bureau of Chemical Safety, Health Products and Food Branch, Health Canada, Sir Frederick Banting Research Centre, 251 Sir Frederick Banting Driveway, Tunney s Pasture, Ottawa, ON K1A 0K9, Canada
    Environ Int 47:48-55. 2012
    ..Concentration levels and patterns observed in this study of Canadians were similar to those reported in the US and European populations...
  18. doi request reprint Application of the QuEChERS method for the analysis of pyrethrins and pyrethroids in fish tissues
    Dorothea F K Rawn
    Food Research Division, Bureau of Chemical Safety, Health Products and Food Branch, Health Canada, 2203C, Tunney s Pasture, Ottawa, ON K1A 0K9, Canada
    Anal Bioanal Chem 397:2525-31. 2010
    ..Cypermethrin concentrations ranged from 0.3 to 6.5 ng/g in the positive samples. It was not, however, observed in any imported fish product or any other domestically produced fish product...
  19. doi request reprint Cohort profile: the maternal-infant research on environmental chemicals research platform
    Tye E Arbuckle
    Population Studies Division, Healthy Environments and Consumer Safety Branch, Health Canada, Ottawa
    Paediatr Perinat Epidemiol 27:415-25. 2013
    ....
  20. doi request reprint Impacts of cooking technique on polychlorinated biphenyl and polychlorinated dioxins/furan concentrations in fish and fish products with intake estimates
    Dorothea F K Rawn
    Food Research Division, Bureau of Chemical Safety, Health Products and Food Branch, Health Canada, Ottawa, Ontario, Canada
    J Agric Food Chem 61:989-97. 2013
    ..PCB and PCDD/F changes associated with cooking generally were small (<15%), although larger mean differences (∼40%) were observed in some fish products (e.g., catfish)...
  21. doi request reprint Challenges and trends in the determination of selected chemical contaminants and allergens in food
    Rudolf Krska
    Food Research Division, Bureau of Chemical Safety, Food Directorate, Health Canada, Ottawa, ON, Canada
    Anal Bioanal Chem 402:139-62. 2012
    ..Both approaches are useful when gathering surveillance data to determine occurrence and background levels of both recognized and newly identified contaminants in foods in order to estimate human daily intake for health risk assessment...