… the procedure for blood collection on the determination of vitamin D and its … blood levels of
vitamin D found. The first was selection of the analytical sample used for quantitative analysis: …

… fast, and a basal 2-mi venous blood sample … The blood was placed in 13 x 100 mm test
tubes, and centrifuged immediately … or at 2, 4, 6, 12, and even 24 h after extraction of the blood. …

… results of vitamin D measurements from venous blood of 96 healthy … blood collection system
showed an excellent performance and thus offers an easy and reliable screening for vitamin …

… The measurement of vitamin D is now commonplace for preventing osteoporosis and …
to establish whether blood sampling seasonality may influence total vitamin D concentration …

… This investigation demonstrates that changes of 25-OH-vitamin D blood levels moderately
influence blood parameters, which reflect blood flow and are important for tissue oxygenation. …

… dried blood spots (DBS). This sample method is less invasive than venous blood collection,
… permits the determination of VA concentration from a drop of blood at the time of collection. …

… agreement in measurement of vitamin D by LC-MS/MS from a blood spot card, prepared in
the lab with vitamin D measurements by LC-MS/MS from serum or whole blood samples. We …

… Metal chelation inhibited oxidation of vitamin C in vitro, … of vitamin C in whole blood and
plasma. Handling and processing blood samples on ice (or at 4 C) delayed oxidation of vitamin …

… vitamin measurements in plasma, whole blood, or erythrocytes based on the biological variation.
For most vitamin … Conventional reference intervals for vitamins are of limited value in the …

… vitamin results. The aim of the guideline is to identify critical pre-analytical, analytical and
post-analytical components of the analysis of vitamins A, E and carotenoids in blood … Vitamins …