ISO 13741-1:2023 PDF

Overview

ISO 13741-1:2023 - "Plastics/rubber - Determination of residual monomers and other organic components by capillary-column gas chromatography - Part 1: Direct liquid injection method" specifies a validated analytical procedure for measuring residual monomers and saturated volatile organics in aqueous polymer dispersions and latices. The method uses capillary-column gas chromatography (GC) with direct liquid injection and flame ionization detection (FID) to quantify trace volatile compounds relevant to health, safety and regulatory compliance.

Key topics and technical requirements

• Analytes covered: acrylic and methacrylic esters (e.g. methyl acrylate, n-butyl acrylate), acrylonitrile, 1,3-butadiene, styrene, vinyl acetate, vinyl chloride, and by-products such as acetaldehyde and ethylbenzene.
• Principle: dilute sample with a water-based internal standard solution and inject ~1 µL onto a capillary GC column; separate components under linear temperature programming and detect with FID.
• Instrumentation: split injection port with a liner, capillary column (30 m, ID 0.25–0.53 mm, 1–5 µm dimethylpolysiloxane film), FID, and chromatography data system/integrator. Typical operating conditions are provided (e.g., injector 150–200 °C, detector 250 °C, initial column 50 °C, program 5 °C/min).
• Reagents and internal standard: propionitrile (recommended internal standard, 990 g/kg); solvents such as dimethylformamide (DMF) or tetrahydrofuran (THF); carrier gases (nitrogen, helium or hydrogen at high purity).
• Calibration and calculation: determine response factors by injecting known masses of analyte with the internal standard; quantify sample concentrations using the prescribed response-factor calculation.
• Performance: detection limit reported as 10 mg/kg (report values below this as