Affiliation: South Holland
- Determination of total folates in infant formula and adult nutritionals by trienzyme extraction and UPLC-MS/MS Quantitation: First Action 2011.06John 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%...
- Determination of antioxidant activity in foods and beverages by reaction with 2,2'-diphenyl-1-picrylhydrazyl (DPPH): collaborative study First Action 2012.04David W Plank
Medallion Laboratories, 9000 Plymouth Ave North, Minneapolis, MN 55427, USA
J AOAC Int 95:1562-9. 2012....
- Determination of beta-carotene in supplements and raw materials by reversed-phase high pressure liquid chromatography: collaborative studyJohn 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...