The Comparison of Different Measuring Methods for Ph Value of Textiles
(1)Chinese standard（GB/T 7573-2009） Weigh 3 2 + 0.05g samples, cut into 5 * 5 mm pieces, add put it into the flask containing 100ml distilled water, shake flask, the samples will be fully soaked, put the flask on the oscillator for 2 hours ±5min, test the pH of aqueous extract (excluding fabric ) at room temperature, and repeat for 3 times, take the average values of the second and third samples as a result of the final results, accurate to 0.1. (2) EU standards (EN 1413-1998) Weigh 3 2 + 0.05g samples, cut into 5 * 5 mm small pieces, and put into flask containing 100ml of potassium chloride solution (0.1mol/L) or 100ml distilled water. and shake flask samples to make it fully soaked, put the flask on the oscillator for2 hours. Test the pH of aqueous extract (excluding fabric ) at room temperature, and repeat for 3 times, take the average values of the second and third samples as a result of the final results, accurate to 0.1. (3) Japanese standard (JIS, L, 1096-1999)...