Description
Specifications Table
Product Name – N,N-Dimethylformamide GC-headspace grade
Quantity/Pack Size – 1 L
Form – Liquid
Grade – GC-headspace
Application – Headspace gas chromatography, residue analysis
Product Overview
N,N-Dimethylformamide (DMF) in GC-headspace grade is a high-purity solvent engineered for demanding headspace gas chromatography applications. This grade ensures minimal background interference, making it ideal for trace-level analysis where solvent purity directly impacts result accuracy. The solvent undergoes rigorous purification to eliminate impurities such as water, amines, and volatile organics, which could otherwise compromise chromatographic separation or peak integrity. Its low volatility and high boiling point (153°C) provide stability during sample preparation, reducing evaporation losses in closed-system analyses. The polar aprotic nature of DMF enhances solubility for a wide range of analytes, including polar and non-polar compounds, while its miscibility with water and organic solvents allows versatile sample dilution. Packaged in amber glass bottles with PTFE-lined caps, this grade minimizes light-induced degradation and contamination risks. The 1 L pack size balances cost-efficiency for frequent users with storage practicality, as DMF absorbs moisture over time. For laboratories prioritizing reproducibility in residual solvent testing, flavor/aroma profiling, or environmental analysis, this GC-headspace grade DMF delivers consistent baseline performance across repeated injections.
FAQs
1. What makes GC-headspace grade DMF different from standard laboratory-grade DMF?
GC-headspace grade undergoes additional distillation and filtration steps to remove trace impurities that could generate false peaks in headspace analysis. Standard grades may contain stabilizers or higher levels of water, which are incompatible with sensitive chromatographic detectors.
2. Can this DMF be used with automated headspace samplers?
Yes, its low viscosity and consistent purity make it suitable for automated systems. However, ensure the sampler’s syringe and transfer lines are compatible with DMF’s solvent properties to prevent corrosion or carryover.
3. How should I store opened bottles of DMF to maintain its grade purity?
Store in a cool, dry place away from direct sunlight, tightly sealed with the original cap. Use a desiccant in the storage area to minimize moisture absorption, and avoid transferring to plastic containers, as DMF can leach additives.
4. What are the key impurities tested for in this GC-headspace grade?
The grade is certified for low levels of water (<0.05%), free amines (<10 ppm), and volatile organics (e.g., methanol, acetone). Each batch includes a certificate of analysis with GC-MS impurity profiles.
5. Is this DMF compatible with mass spectrometry (MS) detectors?
Yes, its high purity reduces ion suppression effects in MS. For optimal performance, use with a guard column to trap any residual non-volatile components that might accumulate in the ion source.
