標準號：IS 12135-1987
發布日期：1987/12/1 12:00:00
實施日期：1999/12/31 12:00:00
適用范圍：1.1 This standard prescribes a method for determination of acetic acid content of acetate or triacetate fibre materials.1.2 The method prescribed in this standard is not applicable to acetate and triacetate fibre materials containing sizing and finishing substances such as polyvinyl acetate, polyacrylic or polymethacrylic acid, cellulose ether, carbonic acid, etc, the presence of which may falsify the results of titration.1.3 While testing dyed or printed specimens, there is a possibility that the dye may get dissolved and hence make it difficult to recognize the colour change during titration. In such a case, the titration should be carried out electrometrically.