prEN 16620 rev

Foodstuffs — Determination of furan and two isomeric methylfuran derivatives (2-methylfuran, 3-methylfuran) in coffee and coffee products using gas chromatography with downstream mass selective detection (GC-MS) prEN 16620 rev

Scope

This document specifies a method for the determination of furan as well as of two isomeric furan derivatives (2-methylfuran, 3-methylfuran) in coffee and coffee products by gas chromatography with in-line mass-selective detection (GC-MS). This method is based on an automated static headspace technology; the quantification is carried out based on a multi-point calibration method using deuterated internal standards.
It is applicable to roasted coffee products as well as coffee extracts. In addition, the method described is applicable, e.g. to coffee beverages produced in accordance with DIN 10792.
The method has been validated in an interlaboratory study. Relative reproducibility standard deviations of sR,rel ≤ 30% are expected when applying this method for the following working ranges, with the exception of 2-methylfuran in the low working range:
Furan: 50 µg/kg to 4 500 µg/kg
2-Methylfuran: 850 µg/kg to 21 800 µg/kg
or
150 µg/kg to 850 µg/kg (sR,rel ≤ 40%), respectively
3-Methylfuran: 7 µg/kg to 700 µg/kg

If required, the working range can be extended by suitable measures, e.g. by using larger or smaller sample weights (m), decreasing or increasing the GC injection volume, etc.