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日用化学工业 ›› 2019, Vol. 49 ›› Issue (5): 310-314.doi: 10.3969/j.issn.1001-1803.2019.05.006

• 开发与应用 • 上一篇    下一篇

凝胶分散法用于TiO2紫外屏蔽能力的测定

景盼盼,谭笑,张迪,田青平()   

  1. 山西医科大学 药学院,山西 太原 030001
  • 收稿日期:2018-08-13 修回日期:2019-05-07 出版日期:2019-05-22 发布日期:2019-05-24
  • 通讯作者: 田青平
  • 作者简介:景盼盼(1993-),女,山西运城人,硕士研究生,电话:18435148034,E-mail:1793823153@qq.com。
  • 基金资助:
    国家级大学生创新创业训练计划项目资助(201610114006);山西省重点学科建设经费资助项目(2016);山西省重点研发计划项目资助(201803D31071)

Gel dispersion method for determination of UV shielding capability of TiO2

JING Pan-pan,TAN Xiao,ZHANG Di,TIAN Qing-ping()   

  1. Department of Pharmacy, Shanxi Medical University, Taiyuan, Shanxi 030001, China
  • Received:2018-08-13 Revised:2019-05-07 Online:2019-05-22 Published:2019-05-24
  • Contact: Qing-ping TIAN

摘要:

利用胶凝作用使颗粒均匀分散于凝胶介质,建立一种测定TiO2紫外吸收的新方法。研究表明,质量分数为0.15%的卡波姆980凝胶可使锐钛型TiO2在3 h内稳定分散。TiO2在UVA和UVB波段无最大吸收,吸光度值随波长增大略有增大。吸光度的均值与其质量浓度在25~70 mg/L范围内线性关系良好,回归方程为A=0.009 7ρ+0.042 5,R 2=0.999,精密度高(RSD=0.20%~1.16%),准确度好(回收率为88.10%~110.3%,RSD=0.58%~1.24%)。该方法用于自制TiO2防晒乳中TiO2的质量浓度定量,相对误差<5%。研究结果可为颗粒型物质分光光度法定量测定提供方法借鉴。

关键词: 凝胶, 锐钛型TiO2, 紫外吸光度, 防晒, 化妆品

Abstract:

A new method for determining UV absorption of TiO2 was established by using gelation to uniformly disperse particles in a gel medium. The results show that 0.15% Carbomer 980 gel can make anatase TiO2 disperse stably within 3 hours. TiO2 has no maximum absorption in the UVA and the UVB bands, and the absorbance value slightly increases with increasing wavelength. The mean absorbance has a good linear relationship with its mass concentration within 25-70 mg/L range, and the regression equation is A=0.009 7ρ+0.042 5, with R 2=0.999, and the precision is high(RSDs=0.20%-1.16%)and the accuracy is good(recoveries 88.10%-110.3%, RSD=0.58%-1.24%). The method was applied to quantify the mass concentration of TiO2 in self-made TiO2 sunscreen lotions, and the relative error is less than 5%. The research results can provide a reference for quantitative determination of granular materials by spectrophotometry.

Key words: gel, anatase TiO2, UV absorbance, sunscreen, cosmetic

中图分类号: 

  • TQ658