EMAIL THIS PAGE TO A FRIEND

Journal of chromatography. A

Electrochemical in situ fabrication of titanium dioxide-nanosheets on a titanium wire as a novel coating for selective solid-phase microextraction.


PMID 25037779

Abstract

A novel TiO2-nanosheets coated fiber for solid-phase microextraction (SPME) was fabricated by anodization of Ti wire substrates in ethylene glycol with concentrated NH4F. The in situ fabricated TiO2-nanosheets were densely embedded into Ti substrates with about 1μm long, 300nm wide and 80nm thick. The as-fabricated TiO2-nanosheets coating was employed to extract polycyclic aromatic hydrocarbons, phthalates and ultraviolet (UV) filters in combination with high performance liquid chromatography-UV detection (HPLC-UV). It was found that the TiO2-nanosheets coating exhibited high extraction capability and good selectivity for some UV filters frequently used in cosmetic sunscreen formulations. The main parameters affecting extraction performance were investigated and optimized. Under the optimized conditions, the calibration graphs were linear in the range of 0.1-400μgL(-1). The limits of detection of the proposed method were between 0.026μgL(-1) and 0.089μgL(-1) (S/N=3). The single fiber repeatability varied from 4.50% to 8.76% and the fiber-to-fiber reproducibility ranged from 7.75% to 9.64% for the extraction of spiked water with 50μgL(-1) UV filters (n=5). The SPME-HPLC-UV method was successfully established for the selective preconcentration and sensitive detection of target UV filters from real environmental water samples. Recovery of UV filters spiked at 10μgL(-1) and 25μgL(-1) ranged from 88.8% to 107% and the relative standard deviations were less than 9.8%. Furthermore the in situ growth of the TiO2-nanosheets coating was performed in a highly reproducible manner and the TiO2-nanosheets coated fiber has high mechanical strength, good stability and long service life.

Related Materials

Product #

Image

Description

Molecular Formula

Add to Cart

W514500
2-Ethylhexyl salicylate, ≥99%
C15H22O3
52184
2-Ethylhexyl salicylate, analytical standard
C15H22O3
437379
2-Ethylhexyl salicylate, 99%
C15H22O3
338869
Ammonium fluoride, ≥99.99% trace metals basis
H4FN
216011
Ammonium fluoride, ACS reagent, ≥98.0%
H4FN
07671
Anthracene, certified reference material, TraceCERT®
C14H10
31581
Anthracene, analytical standard
C14H10
48567
Anthracene, analytical standard
C14H10
10580
Anthracene, suitable for scintillation, ≥99.0% (GC)
C14H10
141062
Anthracene, ReagentPlus®, 99%
C14H10
A89200
Anthracene, reagent grade, 97%
C14H10
694959
Anthracene, sublimed grade, ≥99%
C14H10
ERA-010
Anthracene, vial of 250 mg, analytical standard
C14H10
40076
Anthracene solution, certified reference material, 1000 μg/mL in acetone
C14H10
48647
Anthracene solution, certified reference material, 200 μg/mL in methanol
C14H10
324558
Ethylene glycol, anhydrous, 99.8%
C2H6O2
03747
Ethylene glycol, BioUltra, ≥99.5% (GC)
C2H6O2
85978
Ethylene glycol, analytical standard
C2H6O2
1265515
Ethylene glycol, United States Pharmacopeia (USP) Reference Standard
C2H6O2
PHR1046
Ethylene glycol, Pharmaceutical Secondary Standard; Certified Reference Material
C2H6O2
24204
Ethylene glycol, puriss., ≥99.5% (GC)
C2H6O2
61941 Ethylene glycol 5 M solution
C2H6O2
721980 Ethylene glycol solution, NMR reference standard, 80% in DMSO-d6 (99.9 atom % D), NMR tube size 3 mm × 8 in.
C2H6O2
721972 Ethylene glycol solution, NMR reference standard, 80% in DMSO-d6 (99.9 atom % D), NMR tube size 5 mm × 8 in.
C2H6O2
11474
Fluoranthene, certified reference material, TraceCERT®
C16H10
45504
Fluoranthene, analytical standard
C16H10
48535
Fluoranthene, analytical standard
C16H10
F807
Fluoranthene, 98%
C16H10
01422
Melting point standard 79-81°C, analytical standard
C10H8
84679
Naphthalene, analytical standard
C10H8