Method for analyzing 2, 5-dimethyl-2, 5-bis-(tert-butyl peroxide) hexane in polypropylene melt-blown material
A tert-butyl peroxide, polypropylene melt-blown technology, applied in the direction of material separation, analysis of materials, instruments, etc., can solve the problems of difficult DBPH detection, not yet seen, increased production costs, etc., to achieve the optimization of working conditions, DBPH The effect of precise concentration or content and short analysis time
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example 1
[0059] Take 7.452g of a batch of polypropylene melt-blown material samples into the Erlenmeyer flask, add a certain amount of toluene and heat it to 80°C with a water bath or a heating mantle, all the polypropylene melt-blown material samples are dissolved (the toluene is always kept during the heating process) After completely immersing the polypropylene melt-blown material sample), blow the outer wall of the conical flask with nitrogen or air, and add 50mL of toluene when it is cooled to about 40°C (do not use a water bath for rapid cooling) to obtain a sample solution, and stir it with a glass rod to dissolve it The sample of polypropylene melt-blown material is evenly distributed, poured into a volumetric flask, and add 1mL of solution A, then dilute to 100mL with toluene, shake well, let stand at room temperature for about 1h, take 1μL of the supernatant and inject according to the set Gas chromatography conditions for detection.
[0060] It was detected that the peak are...
example 2
[0062] The internal standard in example 1 is replaced by n-octane, and others are the same as example 1. The results showed that changing the internal standard to n-octane affected the peak shape of the DBPH generated in the gas chromatography qualitative, resulting in the inability to obtain quantitative results.
example 3
[0064] Compared with the chromatographic conditions of Example 1, the holding time at 140° C. was omitted, and the others were the same as Example 1. The results show that the peak shape of DBPH generated in gas chromatography qualitative is poor, which is not conducive to accurate quantification.
[0065] 7. Accuracy verification of sample testing
[0066] The same batch of polypropylene melt-blown material samples were sampled 5 times, and the experiment was carried out according to the given conditions (refer to Example 1), and the test results obtained are shown in Table 2.
[0067] Table 2. Accuracy verification results
[0068]
[0069] According to the results (Table 2), it can be concluded that the RSD is within 5%, indicating good repeatability.
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