NDLI: Surfactant-Alumina-Coated Magnetic Nanoparticles as an Efficient Aldehydes Adsorbent Prior Their Determination by HPLC

Content Provider	Springer Nature Link
Author	Malekpour, Akbar Ahmadi, Najmeh
Copyright Year	2016
Abstract	Separation and determination of trace levels of low-molecular weight aldehydes are very important from water suppliers’ point of view. Modified magnetic nanoparticles can be used for this propose. Alumina-coated magnetic nanoparticles modified with sodium dodecyl sulfate (SDS/Al$_{2}$O$_{3}$/Fe$_{3}$O$_{4}$) are used for extraction of formaldehyde (FA) and acetaldehyde (AA) from drinking water samples. In this manner, the aldehydes were converted to their corresponding hydrazones by the reaction with 2,4-dinitrophenylhydrazine (DNPH). After preconcentration, the HPLC technique was used for the determination of the aldehydes and the results were compared with the commercial C$_{18}$ solid-phase extraction (SPE) columns. The results showed that the extraction with SDS/Al$_{2}$O$_{3}$/Fe$_{3}$O$_{4}$ is more efficient and faster than the commercial columns. A very good repeatability (RSD was 3.3 and 2.4% for FA and AA, respectively, n = 7, C = 50 ppb) was obtained. Linear regression analysis indicated that the responses for two investigated compounds were linear over about two orders of magnitude above the LOD (LOD was 3.6 ppb for FA and 3.2 ppb for AA), with correlation coefficients >0.9990. Determination of FA and AA in tap water and various brands of bottled waters were carried out using the modified nanoparticles. Based on the obtained results, the aldehyde content of the commercial bottled waters was particularly apparent after exposure to direct sunlight.
Starting Page	1817
Ending Page	1825
Page Count	9
File Format	PDF
ISSN	19369751
Journal	Food Analytical Methods
Volume Number	10
Issue Number	6
e-ISSN	1936976X
Language	English
Publisher	Springer US
Publisher Date	2016-12-06
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Aldehydes Bottled water HPLC Magnetic nanoparticles Surfactants Tap water Food Science Chemistry/Food Science Microbiology Analytical Chemistry
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry Safety Research Safety, Risk, Reliability and Quality Applied Microbiology and Biotechnology Food Science

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