John Szpylka

Summary

Affiliation: South Holland
Country: USA

Publications

  1. ncbi request reprint Determination of total folates in infant formula and adult nutritionals by trienzyme extraction and UPLC-MS/MS Quantitation: First Action 2011.06
    John Szpylka
    General Mills Medallion Laboratories, 9000 Plymouth Ave North, Minneapolis, MN 55427, USA
    J AOAC Int 95:1547-54. 2012
  2. ncbi request reprint Determination of antioxidant activity in foods and beverages by reaction with 2,2'-diphenyl-1-picrylhydrazyl (DPPH): collaborative study First Action 2012.04
    David W Plank
    Medallion Laboratories, 9000 Plymouth Ave North, Minneapolis, MN 55427, USA
    J AOAC Int 95:1562-9. 2012
  3. pmc Determination of beta-carotene in supplements and raw materials by reversed-phase high pressure liquid chromatography: collaborative study
    John Szpylka
    Medallion Laboratories Division of General Mills, 9000 Plymouth Ave N, Minneapolis, MN 55427 3870, USA
    J AOAC Int 88:1279-91. 2005

Collaborators

  • Rong Tsao
  • Jonathan W DeVries
  • David W Plank
  • Rui Hai Liu
  • André Düsterloh
  • Steve Baugh
  • Vong Lee
  • C Y Oliver Chen
  • Harry Sapirstein
  • David Woollard
  • Charles M Zapf

Detail Information

Publications3

  1. ncbi request reprint Determination of total folates in infant formula and adult nutritionals by trienzyme extraction and UPLC-MS/MS Quantitation: First Action 2011.06
    John Szpylka
    General Mills Medallion Laboratories, 9000 Plymouth Ave North, Minneapolis, MN 55427, USA
    J AOAC Int 95:1547-54. 2012
    ..Extension of the range to cover folate concentrations of 5-2 000 000 microg/100 g can be achieved with appropriate adjustment of the sample weight and SPE cleanup loading volume. The recoveries ranged from 94.10 to 101.34%...
  2. ncbi request reprint Determination of antioxidant activity in foods and beverages by reaction with 2,2'-diphenyl-1-picrylhydrazyl (DPPH): collaborative study First Action 2012.04
    David W Plank
    Medallion Laboratories, 9000 Plymouth Ave North, Minneapolis, MN 55427, USA
    J AOAC Int 95:1562-9. 2012
    ....
  3. pmc Determination of beta-carotene in supplements and raw materials by reversed-phase high pressure liquid chromatography: collaborative study
    John Szpylka
    Medallion Laboratories Division of General Mills, 9000 Plymouth Ave N, Minneapolis, MN 55427 3870, USA
    J AOAC Int 88:1279-91. 2005
    ..If high levels of alpha-carotenes are present, a second LC system is used for additional separation and quantitation of the carotene species. It is recommended that the method be adopted as an AOAC Official Method...