ε-caprolactam, a residual monomer in nylon 6, was analyzed using Asahipak ODP-50 4D, a reversed-phase chromatography column. Analysis of ε-caprolactam can be performed without an influence from extract contaminants.
Sample pretreatment
- Add 10 mL of pure water to 0.5 g of nylon 6 pellets. Seal and heat at 100 ℃ for 2 hours.
- Once the mixture is cooled to room temperature, filter through a 0.5μm filter. Use the filtrate as a test sample.
Sample: 10 μL
1.ε-Caprolactam
Column：Shodex Asahipak ODP-50 4D (4.6 mm I.D x 150 mm) Eluent：H2O/CH3CN=80/20 Flow rate：0.7 mL/min Detector：UV (210 nm) Column temp.：40 ℃
