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  • Growth of cedar-like Au nanoparticles coating on an etched stainless steel wire and its application for selective solid-phase microextraction.

Growth of cedar-like Au nanoparticles coating on an etched stainless steel wire and its application for selective solid-phase microextraction.

Analytica chimica acta (2015-05-23)
Yida Zhang, Yaoxia Yang, Yi Li, Min Zhang, Xuemei Wang, Xinzhen Du
ABSTRACT

A novel cedar-like Au nanoparticles (AuNPs) coating was fabricated on an etched stainless steel (SS) wire by direct chemical deposition and used as an efficient and unbreakable solid phase microextraction (SPME) fiber. The etched SS wire offers a rough surface structure for subsequent growth of AuNPs in chloroauric acid solution. As a result, the uniform cedar-like AuNPs coating with larger surface area was tightly attached to the etched SS wire substrate. The AuNPs coated etched SS fiber (AuNPs/SS) was examined for SPME of ultraviolet (UV) filters, phthalate esters and aromatic hydrocarbons coupled to high-performance liquid chromatography with UV detection. The fabricated fiber exclusively exhibited excellent extraction efficiency and selectivity for some aromatic hydrocarbons. Influential parameters of extraction and desorption time, temperature, stirring rate and ionic strength were investigated and optimized. The limits of detection ranged from 0.008 μg L(-1) to 0.037 μg L(-1). The single fiber repeatability varied from 3.90% to 4.50% and the fiber-to-fiber reproducibility ranged from 5.15% to 6.87%. The recovery of aromatic hydrocarbons in real water samples spiked at 2.0 μg L(-1) and 20 μg L(-1) ranged from 94.38% to 106.2% with the relative standard deviations below 6.44%. Furthermore the growth of the cedar-like AuNPs coating can be performed in a highly reproducible manner. This fabricated fiber exhibits good stability and withstands at least 200 extraction and desorption replicates.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Phenanthrene, sublimed grade, ≥99.5%
Supelco
SPME Fiber Assembly Polydimethylsiloxane/Divinylbenzene (PDMS/DVB), df 65 μm(PDMS/DVB, for use with autosampler, needle size 23 ga, metal alloy fiber
Sigma-Aldrich
Diethyl pyrocarbonate, 96% (NT)
Supelco
SPME fiber assortment kit 2, for use with autosampler, size 24 ga
Supelco
SPME fiber assortment kit 4, for use with manual holder, size 24 ga
Supelco
SPME fiber assortment kit 1, for use with manual holder, needle size 24 ga
Supelco
SPME fiber assortment kit 1, for use with autosampler, needle size 24 ga
Supelco
SPME fiber assortment kit 4, for use with autosampler, size 24 ga
Supelco
SPME Fiber Assembly Polydimethylsiloxane/Divinylbenzene (PDMS/DVB), df 65 μm(PDMS/DVB, needle size 24 ga, for use with autosampler
Supelco
SPME StableFlex fiber assortment kit, for use with manual holder
Supelco
SPME fiber assortment kit 2, for use with autosampler, needle size 23 ga
Supelco
SPME fiber assortment kit 4, for use with autosampler, needle size 23 ga
Sigma-Aldrich
Di-n-octyl phthalate, ≥98.0% (GC)
Sigma-Aldrich
Sodium phosphate dibasic dodecahydrate, BioXtra, ≥99.0% (T)
Sigma-Aldrich
2-Ethylhexyl 4-(dimethylamino)benzoate, 98%
Sigma-Aldrich
2-Ethylhexyl salicylate, 99%
Sigma-Aldrich
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Sigma-Aldrich
Diethyl pyrocarbonate, 96% (NT)
Sigma-Aldrich
2-Ethylhexyl salicylate, ≥99%
Sigma-Aldrich
2-Hydroxy-4-methoxybenzophenone, 98%
Sigma-Aldrich
Diethyl phthalate, ≥99%
Sigma-Aldrich
Diethyl phthalate, 99.5%
Sigma-Aldrich
Benzo[a]pyrene, ≥96% (HPLC)
Supelco
SPME fiber assortment kit 5, needle size 23 ga, for use with autosampler
Sigma-Aldrich
Diethyl pyrocarbonate, 96% (NT)
Sigma-Aldrich
DBP, 98% (HPLC)
Supelco
SPME StableFlex fiber assortment kit, needle size 24 ga, for use with autosampler
Supelco
SPME StableFlex fiber assortment kit, needle size 23 ga, for use with autosampler
Supelco
SPME fiber assortment kit 2, for use with manual holder, needle size 24 ga
Sigma-Aldrich
Phenanthrene, 98%