AS NZS 1301.011:2018 pdf free

AS NZS 1301.011:2018 pdf free.Methods of test for pulp and paper
The test specimen shall be prepared as follows:
(a) Collect a representative sample of wood chips according to AS/NZS 1301.013rp or a representative sample of pulp according to AS/NZS ISO 7213.
(b) For wood, prepare the sample according to the method prescribed in AS/NZS 1301.002s. For pulp, disintegrate the sample in the high-speed blender as defined in Clause 4.6; however, pulps which do not contain coarse fibres or shives,and which can be dispersed readily in sulphuric acid, could be used without prior disintegration. Mechanical pulp and high yield pulps containing a significant amount of resin shall be extracted with a solvent, in accordance with AS/NZS 1301.012s.
(c) Determine the moisture content of the sample by drying a specimen to constant mass at (105±2)°C and calculating loss of mass as a percentage of the air dry mass.
(d) Prepare a specimen by weighing to within 0.1 mg into a 100 mL beaker an amount of sample calculated to contain (1.0±0.1)g of oven dry wood or (2.0±0.1)g of oven dry pulp. Consider mechanical pulp and very high yield pulps as wood. Prepare a duplicate specimen in the same manner using a separate beaker.
The procedure shall be carried out in duplicate as follows:
(a) Add to the beaker containing a test specimen cold (10°C to 15°C) 72 per cent sulphuric acid; 15 mL for wood and 40 mL for pulp. Add the acid slowly while stirring and macerating the material with a glass rod. Keep the beaker in a water bath at (20±1)°C during dispersion. If the material does not absorb the acid and disperse readily, place the beaker in a vacuum desiccator under vacuum for a few minutes to assist the wetting process (5).
(b) After dispersion cover the beaker with a watch glass and keep it in the water bath for 2 h. Stir frequently during this time to ensure the maximum opportunity for solubilization.
(c) Add 300 mL to 400 mL of water to a flask of the appropriate capacity and transfer the contents of the beaker to the flask. Rinse the beaker with water, add the rinsings to the flask and add sufficient additional water to dilute to the mark on the flask.
(d) Boil the mixture for 4 h, maintaining constant volume by fitting a reflux condenser.AS NZS 1301.011 pdf free download.