Method for detecting total amount of perfluorooctane sulphonates (PFOS) in textile and leather
A perfluorooctanesulfonyl and detection method technology, applied in the field of detection and analysis, to achieve high extraction efficiency, realize analysis and detection, and achieve obvious effects
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Embodiment 1
[0027] Example 1: Determination of the total amount of perfluorooctanesulfonyl substances in leather
[0028] (1) Solvent extraction
[0029] Accurately weigh about 1g of sample particles that are cut into pieces (about 4mm×4mm), add them to a 100ml conical flask with a stopper, add 30mL of methanol, and extract in an ultrasonic bath (40Hz) for 30min after stoppering; filter out the extract, and use 60mL of methanol was extracted twice, each time for 10min; the extracts were combined, and about 2g of anhydrous magnesium sulfate was added for dehydration, and then the volume was adjusted to 100.0mL.
[0030] (2) Chemical treatment of extract
[0031] Pipette 10.0 mL of the sample solution into a 150 mL flat-bottomed flask, concentrate to dryness by rotation, add 5 mL of chromatographic grade tetrahydrofuran, and concentrate by rotation to dryness again; then add 5 mL of a solution containing a cleavage reagent to the bottle, and reflux at 90°C for 60 minutes; Remove the flask...
Embodiment 2
[0042] Example 2: Determination of the total amount of perfluorooctanesulfonyl substances in textiles
[0043] (1) Solvent extraction
[0044] Accurately weigh about 1g of sample particles that are cut into pieces (about 4mm×4mm), add them to a 100ml conical flask with a stopper, add 30mL of methanol, and extract in an ultrasonic bath (40Hz) for 30min after stoppering; filter out the extract, and use 60mL of methanol was extracted twice, each time for 10min; the extracts were combined, and about 2g of anhydrous magnesium sulfate was added for dehydration, and then the volume was adjusted to 100.0mL.
[0045] (2) Chemical treatment of extract
[0046] Pipette 10.0 mL of the sample solution into a 150 mL flat-bottomed flask, concentrate to dryness by rotation, add 5 mL of chromatographic grade tetrahydrofuran, and concentrate by rotation to dryness again; then add 5 mL of a solution containing a cleavage reagent to the bottle, and reflux at 90°C for 60 minutes; Remove the flask,...
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