Analysis of methylparaben in cosmetics based on a chemiluminescence H2 O2 -NaIO4 -CNQDs system.
In this article, a simple, effective chemiluminescence (CL) method for the detection of methylparaben (MP) in cosmetic samples was developed based on an IO4 - -H2 O2 -carbon nitrogen quantum dots (CNQDs) system without a separation process. The results indicated that the redox reaction between periodate and hydrogen peroxide released hydroxide radicals and superoxide radical anions in the presence of bicarbonate. These two radicals were responsible for the formation of excited luminophor CNQD* with a maximum wavelength at 480 nm. Due to the competitive reaction with hydroxide radicals, CL intensity was markedly diminished in the presence of MP. The relative standard deviation in the intraday assay was below 5.5% (n = 9), and the detection limit was as low as 0.50 μmol/L. The proposed method allowed for the successful, selective determination of MP in cosmetics.
['Li|Jie|J|', 'Han|Yingzi|Y|', 'Li|Xinyue|X|', 'Xiong|Liping|L|', 'Wei|Lijun|L|', 'Cheng|Xianglei|X|https://orcid.org/0000-0003-0581-0208']
D002244:Carbon D003358:Cosmetics D049449:Luminescence D009584:Nitrogen D010226:Parabens D045663:Quantum Dots
methylparaben cosmetics chemiluminescence carbon nitrogen quantum dots