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目的对13种再生纸中荧光增白剂在不同模拟物中的迁移行为进行研究,并初步建立迁移数学模型。方法选用月湖水和正己烷作为环境模拟迁移物和油性模拟物,研究荧光增白剂在23℃、40℃时向环境中的迁移行为,以及23℃时向油性模拟物中的迁移行为,采用高效液相色谱法测定荧光增白剂迁移量。结果 13种再生纸中均检测出荧光增白剂,且随时间、温度的增加迁移量均有增加,月湖水环境迁移速度较慢,96 h迁移量小于2.4%,油性模拟物正己烷中荧光增白剂迁移迅速,30 min基本达到100%迁移,结合迁移试验数据建立迁移模型y=a·exp(bx)。结论建立的模型可以有效评估再生纸的安全性。
Aim To study the migration behavior of optical brighteners in 13 kinds of recycled paper in different mimics and to establish a mathematical model of migration. Methods Yuehu water and n-hexane were selected as environmental simulated migrants and oily simulants to study the migration behavior of optical brighteners to the environment at 23 ℃ and 40 ℃, and their migration to oily simulants at 23 ℃. Determination of Fluorescent Brightener Migration by High Performance Liquid Chromatography. Results Fluorescent brighteners were detected in 13 kinds of recycled paper, and the migration amount increased with the increase of time and temperature. The environment of Yuehu Lake migrated slowly, the migration amount was less than 2.4% after 96 h. The fluorescence of n-hexane The whitening agent migrated rapidly and basically reached 100% migration within 30 min. The migration model y = a · exp (bx) was established based on the migration test data. Conclusion The model established can effectively evaluate the safety of recycled paper.