16-05-2013 дата публикации
Номер: US20130122601A1
The technical solution of the present invention provides a method for measuring content of chitosan fiber in textile by using a series of equations. The method calculates the content of chitosan fiber in textile according to the following equations: 1. A method for measuring content of chitosan fiber in textile , characterized in that , the method comprises:step 1: weighing a textile to be measured of a constant weight not more than 2 g, putting into a conical flask, adding 100 ml 1% acetic acid solution to dissolve chitosan fiber in the textile to be measured, and getting ready for use;step 2: weighing the resulting solution in step 1 and putting into another conical flask, further adding deionized water, then adding an indicator of Toluidine Blue, and getting ready for use;{'sub': '1', 'step 3: putting a magnetic rotor into a conical flask containing the resulting solution in step 2, putting the conical flask over a magnetic stirrer; titrating a PVSK titrant and stirring at the same time, and reading the titration volume Vof PVSK titrant at the titration end-point, wherein the titration end-point is defined as a time instant at which the solution turns from blue to purplish red, does not fade in 20 seconds, and forms flocculent precipitates;'}{'sub': '2', 'step 4: getting deionized water with the same amount as that in step 2, carrying out a blank titration in the same manner as described above, and reading the titration volume Vof PVSK titrant'} [{'br': None, 'i': W', '=C×f×', 'V', '−V', 'W, 'sub': 1', '1', '2', '3, '()×0.001×161.15×100/'}, {'br': None, 'i': W', '=C×f×', 'V', '−V', 'W', 'D·D', 'D·D, 'sub': 2', '1', '2', '3, '()×0.001×203.19×100/×(1−)/'}, {'br': None, 'i': g=', 'W', '+W', 'W×, 'sub': 1', '2, '()/100%'}], 'step 5: calculating the content of chitosan fiber in textile according to the following equations2. The method according to claim 1 , characterized in that claim 1 , in said step 1 claim 1 , during the step of dissolving claim 1 , the textile to ...
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