Method for detecting content of blue dyestuff in textile and leather product

[0026] A method for detecting the content of blue dye in textiles and leather products provided by the present embodiment comprises the following steps:

[0027] The first step is to take the textile as a sample, and use scissors to cut the sample into a quadrilateral sample block with no side greater than 5mm;

[0028] In the second step, accurately weigh 1.0g sample (accurate to 0.0001g) with an electronic balance and place it in a 40mL reaction tube, then add 10mL methanol to the reaction tube, and then put the reaction tube into an ultrasonic cleaner for ultrasonic extraction. The temperature of ultrasonic extraction is 70°C, and the duration of ultrasonic extraction is 1h;

[0029] In the third step, after the extraction is completed, take out the reaction tube, cool it to room temperature, shake it fully, let it stand still, and filter the supernatant liquid into the sample bottle through an organic filter head with a diameter of 0.45 μm and made of polyvinylidene fluoride;

[0035]A method for detecting the content of blue dye in textiles and leather products provided by the present embodiment comprises the following steps:

[0036] The first step is to take the textile as a sample, and use scissors to cut the sample into a circular sample block with a diameter not greater than 5mm;

[0037] The second step is to accurately weigh 1.0g sample (accurate to 0.0001g) with an electronic balance and place it in a 40mL reaction tube, then add 20mL ethanol to the reaction tube, and then put the reaction tube into an ultrasonic cleaner for ultrasonic extraction. The temperature of ultrasonic extraction is 80°C, and the duration of ultrasonic extraction is 3h;

[0038] In the third step, after the extraction is completed, take out the reaction tube, cool it to room temperature, shake it fully, let it stand still, and filter the supernatant liquid into the sample bottle through an organic filter head with a diameter of 0.22 μm and made of polytetrafluoroethylen

[0044] A method for detecting the content of blue dye in textiles and leather products provided by the present embodiment comprises the following steps:

[0045] The first step is to take the leather product as a sample, and use scissors to cut the sample into an oval sample block whose major axis is not more than 5mm;

[0046] In the second step, accurately weigh 1.0g sample (accurate to 0.0001g) with an electronic balance and place it in a 40mL reaction tube, then add 30mL dimethyl sulfoxide to the reaction tube, and then put the reaction tube into an ultrasonic cleaner Perform ultrasonic extraction, the temperature of ultrasonic extraction is 95°C, and the duration of ultrasonic extraction is 7h;

[0047] In the third step, after the extraction is completed, take out the reaction tube, cool it to room temperature, shake it fully, let it stand still, and filter the supernatant liquid into the sample bottle through an organic filter head with a diameter of 0.35 μm and made of ny