Determination of TiO2 nanoparticles in sunscreen using N-doped graphene quantum dots as a fluorescent probe

被引：22
作者：
Benitez-Martinez, Sandra [1 ]
Inmaculada Lopez-Lorente, Angela [1 ]
Valcarcel, Miguel [1 ]
机构：
[1] Univ Cordoba, Dept Analyt Chem, E-14071 Cordoba, Spain
来源：
MICROCHIMICA ACTA | 2016年 / 183卷 / 02期
关键词：
Quenching; High-resolution TEM; FTIR; Sun cream; Nanomaterial; Skin carcinogenicity; TITANIUM-DIOXIDE NANOPARTICLES; FIELD-FLOW-FRACTIONATION; ICP-AES; OXIDE; SENSOR; GLYCINE; WATER; ACID; SIZE;
D O I：
10.1007/s00604-015-1696-0
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The article describes a method for the determination of titanium oxide nanoparticles (TiO(2)NPs) in sunscreens using N-doped graphene quantum dots (N-GQDs). The TiO2-NPs are first extracted from the highly lipophilic sunscreen via liquid-liquid extraction. Subsequent fluorimetric analysis of the extracts is based on the quenching effect exerted by TiO(2)NPs on the fluorescence of N-GQDs. The effect is assumed to be due to an electrostatic interaction and/or hydrogen bonding between the particles. The limit of detection for TiO(2)NPs is 1.4 mu ga <...gaEuro3/4(1). The precision at a 5 mu ga <...gaEuro3/4(1) concentration of TiO(2)NPs is 6.95 %. The optimized procedure was successively applied to the determination of TiO2 NPs in sunscreens with different sun protection factors.
引用
收藏
页码：781 / 789
页数：9
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