Articles
Fast and Accurate Analysis of Vitamin D Metabolites Using Novel Chromatographic Selectivity and Sample Preparation
Rat serum was spiked at 300 ng/mL with 25-hydroxyvitamin D2, 25- hydroxyvitamin D3 and epi-25-hydroxyvitamin D3. Protein precipitation was performed offline by adding 100 μL of spiked serum into a 50...
Craig Aurand1, David Bell1, Anders Fridstrom2, and Klaus Buckendahl2
1Supelco, Div. of Sigma-Aldrich, Bellefonte, PA 16823 USA 2Sigma-Aldrich Chemie GmbH, 82024 Taufkirchen, Germany
Keywords: Absorption, Detection methods, High performance liquid chromatography, Immunoassay, Liquid chromatography mass spectrometry, Mass spectrometry, Metabolites, Precipitation, Sample preparations, Separation, Solvents, Vitamins
HPLC Analysis of 25-Dihydroxyvitamin D2, 25-Hydroxyvitamin D3 and 3-epi-25-Hydroxyvitamin D3 on Ascentis® Express F5, 20 °C
From our library of Articles, Sigma-Aldrich presents HPLC Analysis of 25-Dihydroxyvitamin D2, 25-Hydroxyvitamin D3 and 3-epi-25-Hydroxyvitamin D3 on Ascentis® Express F5, 20 °C
Keywords: Chromatography, Clinical, High performance liquid chromatography, Vitamins
HPLC Analysis of 25-Dihydroxyvitamin D2, 25-Hydroxyvitamin D3 and 3-epi-25-Hydroxyvitamin D3 on Ascentis® Express F5, 30 °C
From our library of Articles, Sigma-Aldrich presents HPLC Analysis of 25-Dihydroxyvitamin D2, 25-Hydroxyvitamin D3 and 3-epi-25-Hydroxyvitamin D3 on Ascentis® Express F5, 30 °C
Keywords: Chromatography, Clinical, High performance liquid chromatography, Vitamins
HPLC Analysis of 25-Dihydroxyvitamin D2, 25-Hydroxyvitamin D3 and 3-epi-25-Hydroxyvitamin D3 on Ascentis® Express F5, 40 °C
From our library of Articles, Sigma-Aldrich presents HPLC Analysis of 25-Dihydroxyvitamin D2, 25-Hydroxyvitamin D3 and 3-epi-25-Hydroxyvitamin D3 on Ascentis® Express F5, 40 °C
Keywords: Chromatography, Clinical, High performance liquid chromatography, Vitamins
HPLC Analysis of 25-Hydroxyvitamin D3 and 25-Hydroxyvitamin D2 on Ascentis® Express F5
From our library of Articles, Sigma-Aldrich presents HPLC Analysis of 25-Hydroxyvitamin D3 and 25-Hydroxyvitamin D2 on Ascentis® Express F5
Keywords: Chromatography, Clinical, High performance liquid chromatography, Vitamins
Hormone Standards
Over the past 17 years, hormone testing has increased significantly in the clinical laboratory setting as advances in the specificity and selectivity of LC-MS/MS technology have enabled hormones to s...
Keywords: Clinical, Clinical Chemistry, Diagnostic, Diseases, Endocrinology, High performance liquid chromatography, Hormones, Ion-exchange chromatography, Liquid chromatography mass spectrometry, Mass spectrometry, Metabolites
Improvement in LC/MS Analysis of Vitamin D Metabolites in Serum by Leveraging Column Selectivity and Effective Sample Prep
Clinical interest in vitamin D stems from its implications in an ever-widening range of human health conditions.1 This heightened interest has spawned the need for analytical strategies to assess an ...
Craig Aurand
Reporter US Vol 31.1
Keywords: Clinical, High performance liquid chromatography, Immunoassay, Liquid chromatography mass spectrometry, Mass spectrometry, Metabolic Pathways, Metabolites, Precipitation, Sample preparations, Separation, Solid phase extractions, Solvents, Vitamins
LC/MS Analysis of 25-Hydroxyvitam D3 and 25-Hydroxyvitamin D2 on Ascentis® Express C18
From our library of Articles, Sigma-Aldrich presents LC/MS Analysis of 25-Hydroxyvitam D3 and 25-Hydroxyvitamin D2 on Ascentis® Express C18
Keywords: Chromatography, Clinical, High performance liquid chromatography, Vitamins
LC/MS Analysis of 25-Hydroxyvitamin D2 and 25-Hydroxyvitamin D3 on Ascentis® Express F5
From our library of Articles, Sigma-Aldrich presents LC/MS Analysis of 25-Hydroxyvitamin D2 and 25-Hydroxyvitamin D3 on Ascentis® Express F5
Keywords: Chromatography, Clinical, High performance liquid chromatography, Indicators, Liquid chromatography mass spectrometry, Mass spectrometry, Solvents, Vitamins
LC/MS/MS Analysis of Vitamin D Metabolites on Ascentis® Express F5
From our library of Articles, Sigma-Aldrich presents LC/MS/MS Analysis of Vitamin D Metabolites on Ascentis® Express F5
Keywords: Chromatography, Clinical, High performance liquid chromatography, Liquid chromatography mass spectrometry, Mass spectrometry, Metabolites, Solvents, Vitamins
LC/MS/MS of 25-Dihydroxyvitamin D2, 25-Hydroxyvitamin D3, and 3-epi-25-Hydroxyvitamin D3 in Serum or Plasma on Ascentis® Express F5 after SPE with HybridSPE®-Phospholipid, Minimization of Matrix Effects
From our library of Articles, Sigma-Aldrich presents LC/MS/MS of 25-Dihydroxyvitamin D2, 25-Hydroxyvitamin D3, and 3-epi-25-Hydroxyvitamin D3 in Serum or Plasma on Ascentis® Express F5 after SPE with HybridSPE®-Phospholipid, Minimization of Matrix Effects
Keywords: Chromatography, Clinical, High performance liquid chromatography, Liquid chromatography mass spectrometry, Mass spectrometry, Metabolites, Sample preparations, Solid phase extractions, Vitamins
Mitigation of Deuterium Scrambling in Stable-Labeled Internal Standards during LC-MS MS Analysis
Improvements in LC-MS/MS sensitivity and multiple reaction monitoring (MRM) capabilities are resulting in further adoption of LC-MS/MS technology in clinical settings. One specific clinical challenge...
Authors: Joshua Cooper1, Billy Molloy2, Huahua Jian1, Lisa Calton2, Derrell Johnson1, Isil Dilek1, Uma Sreenivasan1, Don Cooper2
1Cerilliant Corporation, 811 Paloma Drive, Suite A, Round Rock, TX 78665 2 Waters Corporation, Atlas Park, Simonsway, Manchester, M22 5 PP UKCONCLUSIONS
Keywords: Clinical, High performance liquid chromatography, Hormones, Liquid chromatography mass spectrometry, Mass spectrometry, Nuclear magnetic resonance spectroscopy, Phase transitions
Snap-N-Spike® reference solutions of 25-Hydroxyvitamin D
Over the last decade, vitamin D testing has increased significantly in the clinical laboratory setting as research studies have linked vitamin D deficiency to numerous diseases from diabetes, heart d...
Keywords: Clinical, Diabetes, Diseases, High performance liquid chromatography, Ion-exchange chromatography, Liquid chromatography mass spectrometry, Mass spectrometry, Vitamins
Vitamins | Technical Article
Sigma-Aldrich's Cerilliant brand provides certified Snap-N-Spike® | Snap-N-Shoot® solutions of numerous vitamins from the B, A, K and E groups to vitamin D including 25-Hydroxy and 1,25-Dihydroxy ana...
Keywords: Clinical, Degradations, Vitamins