Table 1 Information of calibration standard and isotope labeled materials applied in the current study
From: Development of a certified reference material for the analysis of vitamins in multivitamin tablets
Analyte | Calibration standard material | Purity (%)a | Isotope labeled materialb |
|---|---|---|---|
Thiamine | Thiamine HCl (Dr. Ehrenstofer GmbH) | 95.1 ± 0.1 | 13C4-Thiamine HCl (IsoSciences LLC.) |
Riboflavin | Riboflavin (Dr. Ehrenstofer GmbH) | 99.8 ± 0.1 | 13C4, 15N2-Riboflavin (IsoSciences LLC.) |
Nicotinamide | Nicotinamide (Chromadex) | 99.4 ± 0.3 | Nicotindamide-d4 (CDN Isotope) |
Pantothenic acid | Calcium Pantothenate (Chromadex) | 99.6 ± 0.2 | 13C3, 15N1-Calcium Pantothenate (Cambridge Isotope Laboratories) |
Pyridoxine | Pyridoxine HCl (Chromadex) | 99.5 ± 0.7 | 13C4-Pyridxoen HCl (Cambridge Isotope Laboratories) |
Biotin | Biotin (Dr. Ehrenstofer GmbH) | 99.7 ± 0.1 | Biotin- d2 (IsoSciences LLC.) |
Folic acid | Folic acid (Chromadex) | 89.2 ± 0.1 | 13C5-Folic acid (Merck Eprova AG) |
Retinol | Retinol (Sigma-Aldrich) | ≥ 95 | – |
Tocopherols | α-Tocopherol (Sigma-Aldrich) | ≥ 95 | – |
Cholecalciferol | Cholecalciferol (Sigma-Aldrich) | ≥ 95 | – |
Phylloquinone | Phylloquinone (Sigma-Aldrich) | ≥ 95 | – |