Test kit and detection method for isothiazolinones in textiles

A method for obtaining pretreated isothiazolinones in an acetone and water mixed solution from textiles, comprising the following steps:

• (1) cutting textiles to be tested into pieces, accurately weighing a certain mass of the pieces;
• (2) heating the pieces obtained in step (1) to 30-60° C., then placing the pieces in an environment with a vacuum degree being 0.060-0.080 MPa for 15-30 min, and removing low boiling point organics affecting measurement;
• (3) mixing the pieces obtained in step (2) and an acetone and water mixed solution with a mass ratio of 10-15 times, then heating the mixed solution, and maintain a temperature at about 35° C. for 15-30 min;
• (4) performing sonicate in the mixed solution obtained in step (3) in an ultrasonic wave for 5 min, in order to cause isothiazolinones in textiles to be fully transferred to the acetone and water mixed solution;
• and
• (5) filtering the solution obtained in step (4) with a filter paper, washing the pieces with water, and mixing both filtrated solution and washed solution, to obtain pretreated isothiazolinones in the acetone and water mixed solution.