HPLC Method for Analysis of Choline on Obelisc R by SIELC Technologies
Choline is an essential nutrient with the chemical formula C5H14NO. It plays a crucial role in various physiological processes in the body. It is often grouped with B-vitamins, but it is not officially recognized as a vitamin. Choline serves several important functions, including:
- Cell Membrane Structure: Choline is a component of phospholipids, essential structural components of cell membranes. It helps maintain the structural integrity and fluidity of cell membranes.
- Neurotransmitter Synthesis: Choline is a precursor to acetylcholine, a neurotransmitter that is involved in muscle control, memory, and other cognitive functions. Adequate choline levels are important for maintaining proper neurotransmitter balance in the brain.
- Methyl Group Donor: Choline is a source of methyl groups, which are important for various biochemical reactions in the body, including the methylation of DNA, a process that regulates gene expression.
- Brain Development: Choline is particularly important during periods of rapid growth, such as fetal development and early childhood. Adequate choline intake during pregnancy is associated with better cognitive outcomes in children.
- Liver Function: Choline is involved in lipid metabolism and helps prevent the accumulation of fat in the liver. It is essential for the transport and metabolism of fats, and it plays a role in preventing non-alcoholic fatty liver disease.
- Muscle Function: Choline is involved in muscle movement and helps regulate the functioning of muscles.
Choline is found in a variety of foods including but not limited to eggs, meat, poultry, and fish, dairy products, nuts and seeds, certain vegetables, such as broccoli and Brussels sprouts
Choline can be retained and analyzed using an Obelisc R mixed-mode stationary phase column. The analysis employs an isocratic method with a simple mobile phase consisting of water, acetonitrile (MeCN), and ammonium acetate as a buffer. Detection is achieved using ELSD
| Column | Obelisc R, 2.1 x 100 mm, 5 µm, 100 A, dual ended |
| Mobile Phase | MeCN/H2O – 20/80% |
| Buffer | Ammonium acetate pH 5.0 – 10 mM |
| Flow Rate | 0.2 ml/min |
| Detection | ELSD, the nebulizer and evaporator temperatures 70°C, with a gas flow rate of 1.6 Standard Liters per Minute (SLM) |
| Samples | 1 mg/ml |
| Injection volume | 1 µl |
| LOD* | 200 ppb |
| Class of Compounds | Quaternity amines |
| Analyzing Compounds | Choline |
Application Column
Obelisc R
Column Diameter: 2.1 mm
Column Length: 100 mm
Particle Size: 5 µm
Pore Size: 100 A
Column options: dual ended
