Research on the Dissolution Characteristics of Bisphenol A and Bisphenol S in Imported Recycled Plastic Granules
In order to strengthen the supervision of my country's imported plastic granules and reduce the risk of using my country's imported recycled plastic granules,a more complete and stricter limit standard has been established.The study used high performance liquid chromatography-ultraviolet detection to analyze the content of bisphenol A and bi-sphenol S in five imported recycled plastic particles,and further explored the contact time,temperature and simula-tion effect of solution on the dissolution of bisphenol A and bisphenol S from recycled plastic pellets.The results showed that:(1)Among the five kinds of recycled plastic granules,the contents of bisphenol A and bisphenol S in ABS recycled plastic granules were the highest,with the average content of(69.44±5.32)mg/kg and(125.59±5.62)mg/kg,respectively.(2)In the process of exploring the influencing factors of contact time,the dissolution amount of bisphenol A and bisphenol S in the simulated solution showed an obvious increasing trend within 96-168 h,until 240 h the dissolution amount reached equilibrium.(3)In the process of exploring the factors affecting tempera-ture,the total dissolution of bisphenol A and bisphenol S at 70℃ was significantly greater than that at 40℃ and 25℃.(4)In the process of exploring the influencing factors of the simulated solution,bisphenol S was not dissolved in the acetic acid simulated solution,and the amount of bisphenol A dissolved in ethanol was significantly higher than that in acetic acid,indicating that there was a similar phase dissolution effect.
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