IS 12135 : 1987 Method for determination of acetic acid content of acetate or triacetate fibres

1 Scope

1.1 This standard prescribes a method for determination of acetic acidcontent of acetate or triacetate fibre materials.

1.2 The method prescribed in this standard is not applicable to acetate andtriacetate fibre materials containing sizing and finishing substances such aspolyvinyl 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 thedye may get dissolved and hence make it difficult to recognize the colour changeduring titration. In such a case, the titration should be carried outelectrometrically.

2 References

IS 2 :1960 Rules for rounding off numericalvalues

IS 1070 :1977 Specification for water for general laboratory use

IS 9068 :1979 Recommended methods for the removal of non-fabrousmatter prior to quantitative analysis of fibre mixtures