Thiomersal photo-degradation with visible light mediated by graphene quantum dots: Indirect quantification using optical multipath mercury cold-vapor absorption spectrophotometry

被引：10

作者：

Miranda-Andrades, Jarol R. ^{[1
]}

Khan, Sarzamin ^{[1
,2
]}

Toloza, Carlos A. T. ^{[1
]}

Romani, Eric C. ^{[3
]}

Freire Junior, Fernando L. ^{[3
]}

Aucelio, Ricardo Q. ^{[1
]}

机构：

[1] Pontifical Catholic Univ Rio de Janeiro PUC Rio, Dept Chem, BR-22451900 Rio De Janeiro, Brazil

[2] Univ Swabi, Dept Chem, Khyber Pakhtunkhwa 23561, Anbar, Pakistan

[3] Pontifical Catholic Univ Rio de Janeiro PUC Rio, Dept Phys, BR-22451900 Rio De Janeiro, Brazil

来源：

SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY | 2017年 / 138卷

关键词：

Thiomersal; Graphene quantum dots; Photo-degradation; Mercury; Cold vapor atomic absorption spectrometry; PERFORMANCE LIQUID-CHROMATOGRAPHY; ATOMIC FLUORESCENCE SPECTROMETRY; PHOTOCATALYTIC DEGRADATION; OPHTHALMIC SOLUTIONS; ORGANIC MERCURY; THIMEROSAL; ETHYLMERCURY; PRODUCTS; VACCINES; GENERATION;

D O I：

10.1016/j.sab.2017.10.011

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

Thiomersal is employed as preservative in vaccines, cosmetic and pharmaceutical products due to its capacity to inhibit bacterial growth. Thiomersal contains 49.55% of mercury in its composition and its highly toxic ethylmercury degradation product has been linked to neurological disorders. The photo-degradation of thiomersal has been achieved by visible light using graphene quantum dots as catalysts. The generated mercury cold vapor (using adjusted experimental conditions) was detected by multipath atomic absorption spectrometry allowing the quantification of thiomersal at values as low as 20 ng L-1 even in complex samples as aqueous effluents of pharmaceutical industry and urine. A kinetic study (pseudo-first order with k = 0.11 min(-1)) and insights on the photo-degradation process are presented. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：81 / 89

页数：9

共 3 条

[1] Indirect voltammetric determination of thiomersal in influenza vaccine using photo-degradation and graphene quantum dots modified glassy carbon electrode
Pedrozo-Penafiel, Marlin J.
Miranda-Andrades, Jarol R.
Gutierrez-Beleno, Luis M.
Larrude, Dunieskys G.
Aucelio, Ricardo Q.
TALANTA, 2020, 215 (215)
[2] Thiomersal determination in vaccines using graphene quantum dots-TiO2 nanocomposite to promote temporally selective photo-production of Hg cold vapor
Miranda-Andrades, Jarol R.
Pedrozo-Penafiel, Marlin J.
Mendes, Joseane A.
Aucelio, Ricardo Queiroz
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY, 2022, 194
[3] Photo-generation of mercury cold vapor mediated by graphene quantum dots/TiO2 nanocomposite: On line time-resolved speciation at ultra-trace levels
Miranda-Andrades, Jarol R.
Letichevsky, Sonia
Gonzalez Larrude, Dunieskys R.
Aucelio, Ricardo Q.
ANALYTICA CHIMICA ACTA, 2020, 1127 (1127) : 256 - 268

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