Li in cigarette pack + 、na + 、nh 4 + 、k + 、mg 2+ 、ca 2+ Ion content determination method
A determination method and packaging bag technology, which are applied in the directions of measurement devices, material separation, instruments, etc., can solve the problems of no smokeless tobacco product accessories and content research reports, smoke taste, taste impact, consumer impact, etc. , to achieve stable content determination results, prolong storage time, and increase the number of detections
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Embodiment 1
[0047] Example 1 Li in cigarette-containing packaging bags + 、Na + , NH 4 + 、K + , Mg 2+ , Ca 2+ Content Determination of Ion Standard Solution
[0048] (1) Standard solution sample preparation conditions:
[0049] Li was prepared from the extract using a polytetrafluoroethylene (PETT) volumetric flask + 、Na + , NH 4 + , K + , Mg 2+ , Ca 2+ A standard solution with an ion concentration of 2 μg / mL.
[0050] The extract is: methanol: ethanol: hydrochloric acid (concentrated hydrochloric acid with a mass fraction of about 35.5%): water, mixed according to 500mL: 500mL: 2.6mL: 1000mL. After shaking at room temperature for 10 minutes, the extract was passed through a 0.22 μm hydrophilic polyvinylidene fluoride (PVDF) filter membrane, and the filtered extract was collected as a sample and placed in an ion chromatography vial for detection.
[0051] (2) Sample ion chromatography IC detection:
[0052] Chromatographic column: CS19 analytical column equipped with CG19 g...
Embodiment 2
[0054] Example 2 Li in the samples of cigarette-containing packaging bags + 、Na + , NH 4 + 、K + , Mg 2+ , Ca 2+ Determination of ion content
[0055] (1) preparation of the sample solution to be tested;
[0056] (2) use ion chromatography to detect;
[0057] (3) Quantitative analysis;
[0058] The specific method for the preparation of the sample solution to be tested in step (1) is: accurately weigh 0.2 g of the bagged cigarette-containing packaging bag sample, put it into a 100 mL stoppered polytetrafluoroethylene conical flask, add 50 mL of extraction agent, and extract by shaking at room temperature After 40 minutes, after standing for 5 minutes, the extract was filtered through a 0.45 μm polyethersulfone (PES) filter membrane, and the filtered extract was collected as a sample and placed in an ion chromatography bottle to obtain a sample solution to be tested; wherein, the extractant was: ethanol: Nitric acid (concentrated nitric acid with a mass fraction of abou...
Embodiment 3
[0067] Example 3 Li in the cigarette package bag sample + 、Na + , NH 4 + 、K + , Mg 2+ , Ca 2+ Determination of ion content
[0068] (1) preparation of the sample solution to be tested;
[0069] (2) use ion chromatography to detect;
[0070] (3) Quantitative analysis;
[0071] The specific methods of steps (1), (2) and (3) are the same as in Example 2, except that the sample solution to be tested prepared by step (1) is placed for 12hr before detection, and the specific detection results are shown in Table 3.
[0072] Table 3. Assay results
[0073]
[0074] As can be seen from the results in Table 3, the test result after the test sample solution is placed for 12hr is almost consistent with the result of the immediate detection in Example 2, which shows that the Li in the test sample + 、Na+ , NH 4+ 、K + , Mg 2+ , Ca 2+ The ions can exist stably under the protective effect of the extractant, and the content determination method of the present invention prolongs...
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