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Apparatus and auxiliary aids in EN 14719 (Pulp, paper andboard-Determinationof the DIPN content by solventextraction)

Posted Date:2026/1/5 1

4 Apparatus and auxiliary aids

NOTE An instrument or item of apparatus is listed only if it is special, or made to a particular specification, usual laboratory glassware and equipment being assumed to be available.

4.1 Gas chromatograph

Equipped with a mass selective detector.

4.2 Gas chromatograph analytical capillary column

Appropriate operating conditions shall be established for the specific equipment used for the determination.

An example of suitable chromatographic conditions is given below:

Column      5 % phenylmethyl siloxane 30 m x 0,25 mm ID 0,25 μm film thickness

Carrier gas:   Helium, 1 ml/min

Temperature program:   isothermal at 70 "C for 2 min, from 70 °C to 250 °C at 10 °C/min

isothermal at 250 °C for 15 min

Injector:     Splitless. 240 °C

Transferline:   280 °C

Detection:   MSD (Mass Selective Detector)

lons, disopropy|naphthalene (DIPN) m/z 155, 197, 212

diethylnaphthalene (DEN) m/z 169

The following retention times have been observed under these conditions:

-- disopropylnaphthalene(DIPN) 6 major isomers 15,5 min to 16,1 min;

-- diethylnaphthalene (DEN) 14,8 min.

A separation of diisopropyinaphthalene (DIPN) into 7 isomers was observed with other columns, which did not influence the result.

4.3 Ultrasonic bath

4.4 Microsyringes, 100 μl, 250 μl

4.5 Graduated pipettes, 1 ml, 2 ml, 10 ml

4.6 40 ml screw top vials, with PTFE (polytetrafluorethylene) lined septa