Jon W Wong

Summary

Affiliation: Food and Drug Administration
Country: USA

Publications

  1. ncbi request reprint Analysis of organophosphorus pesticides in dried ground ginseng root by capillary gas chromatography-mass spectrometry and -flame photometric detection
    Jon W Wong
    Center for Food Safety and Applied Nutrition, Office of Plant and Dairy Foods, HFS 336, U S Food and Drug Administration, 5100 Paint Branch Parkway, College Park, MD 20740 3835, USA
    J Agric Food Chem 55:1117-28. 2007
  2. ncbi request reprint A rapid multiresidue method for determination of pesticides in fruits and vegetables by using acetonitrile extraction/partitioning and solid-phase extraction column cleanup
    Frank J Schenck
    U S Food and Drug Administration, Southeast Regional Laboratory, Atlanta, GA 30309, USA
    J AOAC Int 91:422-38. 2008
  3. doi request reprint Multiresidue pesticide analysis by capillary gas chromatography-mass spectrometry
    Jon W Wong
    Center for Food Safety and Applied Nutrition, U S Food and Drug Administration, College Park, MD, USA
    Methods Mol Biol 747:131-72. 2011
  4. doi request reprint Multiresidue pesticide analysis of ginseng powders using acetonitrile- or acetone-based extraction, solid-phase extraction cleanup, and gas chromatography-mass spectrometry/selective ion monitoring (GC-MS/SIM) or -tandem mass spectrometry (GC-MS/MS)
    Jon W Wong
    Center for Food Safety and Applied Nutrition, US Food and Drug Administration, HFS 706, 5100 Paint Branch Parkway, College Park, Maryland 20740 3835, USA
    J Agric Food Chem 58:5884-96. 2010
  5. doi request reprint Multiresidue pesticide analysis in fresh produce by capillary gas chromatography-mass spectrometry/selective ion monitoring (GC-MS/SIM) and -tandem mass spectrometry (GC-MS/MS)
    Jon W Wong
    Center for Food Safety and Applied Nutrition, Office of Regulatory Science, US Food and Drug Administration, HFS 706, 5100 Paint Branch Parkway, College Park, Maryland 20740 5350, USA
    J Agric Food Chem 58:5868-83. 2010
  6. doi request reprint Multiresidue pesticide analysis of agricultural commodities using acetonitrile salt-out extraction, dispersive solid-phase sample clean-up, and high-performance liquid chromatography-tandem mass spectrometry
    Kai Zhang
    U S Food and Drug Administration, Center for Food Safety and Applied Nutrition, College Park, MD 20740 3835, USA
    J Agric Food Chem 59:7636-46. 2011
  7. doi request reprint Multiresidue pesticide analysis of botanical dietary supplements using salt-out acetonitrile extraction, solid-phase extraction cleanup column, and gas chromatography-triple quadrupole mass spectrometry
    Douglas G Hayward
    US Food and Drug Administration, Center for Food Safety and Applied Nutrition, College Park, Maryland 20740 3835, United States
    Anal Chem 85:4686-93. 2013
  8. doi request reprint Determination of mycotoxins in milk-based products and infant formula using stable isotope dilution assay and liquid chromatography tandem mass spectrometry
    Kai Zhang
    Center for Food Safety and Applied Nutrition, Office of Regulatory Science, HFS 706, U S Food and Drug Administration, 5100 Paint Branch Parkway, College Park, Maryland 20740, USA
    J Agric Food Chem 61:6265-73. 2013
  9. ncbi request reprint Multiresidue pesticide analysis in ginseng and spinach by nontargeted and targeted screening procedures
    Douglas G Hayward
    U S Food and Drug Administration, 5100 Paint Branch Pkwy, College Park, MD 20740, USA
    J AOAC Int 94:1741-51. 2011
  10. doi request reprint Organohalogen and organophosphorous pesticide method for ginseng root--a comparison of gas chromatography-single quadrupole mass spectrometry with high resolution time-of-flight mass spectrometry
    Douglas G Hayward
    U S Food and Drug Administration, Center for Food Safety and Applied Nutrition, Office of Regulatory Science, 5100 Paint Branch Parkway, HFS 706, College Park, Maryland 20740 5350, USA
    Anal Chem 81:5716-23. 2009

Collaborators

Detail Information

Publications18

  1. ncbi request reprint Analysis of organophosphorus pesticides in dried ground ginseng root by capillary gas chromatography-mass spectrometry and -flame photometric detection
    Jon W Wong
    Center for Food Safety and Applied Nutrition, Office of Plant and Dairy Foods, HFS 336, U S Food and Drug Administration, 5100 Paint Branch Parkway, College Park, MD 20740 3835, USA
    J Agric Food Chem 55:1117-28. 2007
    ....
  2. ncbi request reprint A rapid multiresidue method for determination of pesticides in fruits and vegetables by using acetonitrile extraction/partitioning and solid-phase extraction column cleanup
    Frank J Schenck
    U S Food and Drug Administration, Southeast Regional Laboratory, Atlanta, GA 30309, USA
    J AOAC Int 91:422-38. 2008
    ..0 ppm. Data were provided by 3 different laboratories. The modified QuEChERS method resulted in a 65% reduction in solvent usage, when compared with the traditional multiresidue methods previously used in our laboratories...
  3. doi request reprint Multiresidue pesticide analysis by capillary gas chromatography-mass spectrometry
    Jon W Wong
    Center for Food Safety and Applied Nutrition, U S Food and Drug Administration, College Park, MD, USA
    Methods Mol Biol 747:131-72. 2011
    ..The development of these techniques demonstrates the powerful use of GC-MS for the screening, identification, and quantitation of pesticide residues in foods...
  4. doi request reprint Multiresidue pesticide analysis of ginseng powders using acetonitrile- or acetone-based extraction, solid-phase extraction cleanup, and gas chromatography-mass spectrometry/selective ion monitoring (GC-MS/SIM) or -tandem mass spectrometry (GC-MS/MS)
    Jon W Wong
    Center for Food Safety and Applied Nutrition, US Food and Drug Administration, HFS 706, 5100 Paint Branch Parkway, College Park, Maryland 20740 3835, USA
    J Agric Food Chem 58:5884-96. 2010
    ..The procedures described were shown to be effective in screening, identifying, confirming, and quantitating pesticides in commercial ginseng products...
  5. doi request reprint Multiresidue pesticide analysis in fresh produce by capillary gas chromatography-mass spectrometry/selective ion monitoring (GC-MS/SIM) and -tandem mass spectrometry (GC-MS/MS)
    Jon W Wong
    Center for Food Safety and Applied Nutrition, Office of Regulatory Science, US Food and Drug Administration, HFS 706, 5100 Paint Branch Parkway, College Park, Maryland 20740 5350, USA
    J Agric Food Chem 58:5868-83. 2010
    ....
  6. doi request reprint Multiresidue pesticide analysis of agricultural commodities using acetonitrile salt-out extraction, dispersive solid-phase sample clean-up, and high-performance liquid chromatography-tandem mass spectrometry
    Kai Zhang
    U S Food and Drug Administration, Center for Food Safety and Applied Nutrition, College Park, MD 20740 3835, USA
    J Agric Food Chem 59:7636-46. 2011
    ..5 to >1000 ppb in a variety of agricultural samples, demonstrating fitness for screening and surveillance applications...
  7. doi request reprint Multiresidue pesticide analysis of botanical dietary supplements using salt-out acetonitrile extraction, solid-phase extraction cleanup column, and gas chromatography-triple quadrupole mass spectrometry
    Douglas G Hayward
    US Food and Drug Administration, Center for Food Safety and Applied Nutrition, College Park, Maryland 20740 3835, United States
    Anal Chem 85:4686-93. 2013
    ..7 and 2800 μg/kg. Validation with these botanicals demonstrated the extent of this method's applicability for screening 310 pesticides in a wide array of botanical dietary supplements. ..
  8. doi request reprint Determination of mycotoxins in milk-based products and infant formula using stable isotope dilution assay and liquid chromatography tandem mass spectrometry
    Kai Zhang
    Center for Food Safety and Applied Nutrition, Office of Regulatory Science, HFS 706, U S Food and Drug Administration, 5100 Paint Branch Parkway, College Park, Maryland 20740, USA
    J Agric Food Chem 61:6265-73. 2013
    ....
  9. ncbi request reprint Multiresidue pesticide analysis in ginseng and spinach by nontargeted and targeted screening procedures
    Douglas G Hayward
    U S Food and Drug Administration, 5100 Paint Branch Pkwy, College Park, MD 20740, USA
    J AOAC Int 94:1741-51. 2011
    ..Improvements to instrumentation, methods, and software are needed for efficient use of nontargeted screens in parallel with triple quadrupole MS...
  10. doi request reprint Organohalogen and organophosphorous pesticide method for ginseng root--a comparison of gas chromatography-single quadrupole mass spectrometry with high resolution time-of-flight mass spectrometry
    Douglas G Hayward
    U S Food and Drug Administration, Center for Food Safety and Applied Nutrition, Office of Regulatory Science, 5100 Paint Branch Parkway, HFS 706, College Park, Maryland 20740 5350, USA
    Anal Chem 81:5716-23. 2009
    ..No significant differences were found in the concentrations measured for these pesticides on commercial ginsengs using either of the two GC/MS techniques...
  11. doi request reprint Multiresidue pesticide analysis of wines by dispersive solid-phase extraction and ultrahigh-performance liquid chromatography-tandem mass spectrometry
    Kai Zhang
    Center for Food Safety and Applied Nutrition, HFS 706, US Food and Drug Administration, 5100 Paint Branch Parkway, College Park, Maryland 20740 3835, USA
    J Agric Food Chem 57:4019-29. 2009
    ..The method was used to analyze 10 wines collected from a market basket survey, and 19 different pesticides, primarily fungicides, were present at concentrations ranging from <1.0 to 1000 μg/L...
  12. doi request reprint Multi-mycotoxin analysis of finished grain and nut products using high-performance liquid chromatography-triple-quadrupole mass spectrometry
    Chia Ding Liao
    Center for Food Safety and Applied Nutrition, U S Food and Drug Administration, 5100 Paint Branch Parkway, College Park, MD 20740 3835, USA
    J Agric Food Chem 61:4771-82. 2013
    ..1 μg/kg (aflatoxin B1 in peanuts) to 1143 ± 87 μg/kg (fumonisin B1 in corn flour). This rapid and efficient method was shown to be rugged and effective for the multiresidue analysis of mycotoxins in finished grain and nut products...
  13. doi request reprint Protocol for an electrospray ionization tandem mass spectral product ion library: development and application for identification of 240 pesticides in foods
    Kai Zhang
    Office of Regulatory Science, Center for Food Safety and Applied Nutrition, US Food and Drug Administration, College Park, Maryland 20740, United States
    Anal Chem 84:5677-84. 2012
    ..The approach has a broad application in LC-MS/MS type targeted screening in food analysis...
  14. doi request reprint Determination of siloxanes in silicone products and potential migration to milk, formula and liquid simulants
    Kai Zhang
    US Food and Drug Administration, Center for Food Safety and Applied Nutrition, Office of Regulatory Science, 5100 Paint Branch Parkway, HFS 706, College Park, MD 20740, USA
    Food Addit Contam Part A Chem Anal Control Expo Risk Assess 29:1311-21. 2012
    ..The highest detected concentrations of D4, D5 and D6 were 42, 36 and 155 ng/ml, respectively, indicating very limited migration of D4, D5 or D6 into the two simulants...
  15. ncbi request reprint A perspective on high throughput analysis of pesticide residues in foods
    Kai Zhang
    U S Food and Drug Administration, Center for Food Safety and Applied Nutrition, Office of Regula Science, 5100 Paint Branch Parkway, HFS 706, College Park, MD 20740, USA
    Se Pu 29:587-93. 2011
    ..This review discusses how sample throughput of pesticide analysis could be improved with an emphasis on sample preparation, instrumentation and data analysis...
  16. doi request reprint Multiresidue method for pesticides and persistent organic pollutants (POPs) in milk and cream using comprehensive two-dimensional capillary gas chromatography-time-of-flight mass spectrometry
    Douglas G Hayward
    US Food and Drug Administration, College Park, Maryland 20740, USA
    J Agric Food Chem 58:5248-56. 2010
    ....
  17. ncbi request reprint Multiresidue pesticide analysis in wines by solid-phase extraction and capillary gas chromatography-mass spectrometric detection with selective ion monitoring
    Jon W Wong
    Alcohol and Tobacco Laboratory, National Laboratory Center, Bureau of Alcohol, Tobacco and Firearms, 1401 Research Boulevard, Rockville, Maryland 20850, USA
    J Agric Food Chem 51:1148-61. 2003
    ....
  18. ncbi request reprint Multiresidue determination of pesticides in malt beverages by capillary gas chromatography with mass spectrometry and selected ion monitoring
    Jon W Wong
    Alcohol and Tobacco Laboratory, National Laboratory Center, Alcohol and Tobacco Tax and Trade Bureau formerly the Bureau of Alcohol, Tobacco and Firearms, Ammendale, Maryland 20705 1250, USA
    J Agric Food Chem 52:6361-72. 2004
    ..The use of the extraction/cleanup procedure and analysis by GC-MS(SIM) proved effective in screening malt beverages for a wide variety of pesticides...