Bare polyprolylene hollow fiber as extractive phase for in‐tube solid‐phase microextraction to determine estrogens in water samples

Self Cite

Resorcinol-formaldehyde aerogel coating was in situ prepared on the surface of basalt fibers. The aerogel coating is uniformly modified onto basalt fibers, and it is very porous according to the characterization by using scanning electron microscopy. An extraction tube was prepared for in-tube solid-phase microextraction by placing the aerogel-coated basalt fibers into a polyetheretherketone tube. To evaluate the extraction performance toward five estrogenic compounds, the tube was connected with high performance liquid chromatography, the important extraction and desorption conditions were investigated. An online analytical method for detection of estrogens was developed and presented low limits of detection (0.005-0.030 µg/L), wide linear ranges (0.017-20, 0.033-20, and 0.099-20 µg/L), good linearity (r > 0.9990), and satisfactory repeatability (relative standard deviation < 2.7%). The method was successfully applied to detect trace estrogens in real water samples (bottled pure water and bottled mineral water), satisfactory recoveries were ranged from 80 to 125% with two spiking levels of 2 and 6 µg/L. K E Y W O R D Saerogels, estrogens, high performance liquid chromatography, online analysis, solid-phase microextraction

Section: Resultsmentioning

confidence: 87%

Section: Resultsmentioning

confidence: 93%

Resorcinol–formaldehyde aerogel coating for in‐tube solid‐phase microextraction of estrogens

Jiang

Sun

2020

Self Cite

“…In this case, one of the most popular fibers is polypropylene hollow fiber. Because of its low cost, high porosity, simple operation, high surface area, and good stability, it is used for FIT-SPME with different modifications [17]. Polypropylene hollow fiber was directly applied for intube SPME as the absorbent which was placed into the PEEK tube to evaluate five environmental estrogen hormones [17].…”

Section: Introductionmentioning

confidence: 99%

“…Because of its low cost, high porosity, simple operation, high surface area, and good stability, it is used for FIT-SPME with different modifications [17]. Polypropylene hollow fiber was directly applied for intube SPME as the absorbent which was placed into the PEEK tube to evaluate five environmental estrogen hormones [17]. In this work, magnetic nanoparticles of Fe 3 O 4 were dispersed in the pores of the polypropylene hollow fiber to provide mechanical stability and increase the surface area to improve extraction ability [18].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of an organic‐inorganic hybrid absorbent for in‐tube solid‐phase microextraction of bisphenol A

Nasrollahi

Yamini

Shamsayei

2020

This research is an application of fiber-in-tube solid-phase microextraction followed by high-performance liquid chromatography with UV detection for the extraction and determination of trace amounts of bisphenol A. Nanomagnetic Fe 3 O 4 was formed on the surface of polypropylene porous hollow fibers to increase the surface area and then it was coated with polystyrene. The introduction of polystyrene improves the surface hydrophobicity and is an appropriate extractive phase because it is highly stable in aquatic media. The extraction was carried out in a short capillary packed longitudinally with the fine fibers as the extraction medium. Extraction conditions, including extraction and desorption flow rates, extraction time, pH, and ionic strength of the sample solution, were investigated and optimized. Under optimal conditions, the limit of detection was 0.01 µg/L. This method showed good linearity for bisphenol A in the range of 0.033-1000 µg/L, with the coefficient of determination of 0.9984. The inter-and intraday precisions (RSD%, n = 3) were 7.9 and 6.3%, respectively. Finally, the method was applied to analysis of the analyte in thermal papers, disposable plastic cups, and soft drink bottles.

“…Therefore, it is necessary to concentrate and purify the analytes present in water samples. Many methods have been proposed for extraction of hormones from an aqueous matrix, such as SPE , ultrasonic liquid extraction , dispersive‐SPE sorbent , micro‐SPE , molecularly imprinted solid‐phase extraction (MISPE) , magnetic‐SPE , stir bar sorptive extraction , SPME , stir cake sorptive extraction , fabric phase sorptive extraction and LLE. Due to the low cost of analysis and high sample recovery, the most commonly used technique for concentration and purification of such samples is SPE; however, popular sorbents are characterized by low selectivity that leads to simultaneous extraction of matrix elements .…”

Section: Introductionmentioning

confidence: 99%

Molecularly imprinted polymer film grafted from porous silica for efficient enrichment of steroid hormones in water samples

Szczukocki

Krawczyk

Juszczak

et al. 2019

Steroid hormones as endocrine disrupting compounds can interfere with the functioning of hormonal systems of organisms and thus affect the health and reproduction of humans and wildlife. Unfortunately, these types of harmful endocrine disrupting compounds have been found in a variety of environmental samples at very low concentrations. Therefore, a simple, fast, and efficient method for enrichment of water samples is needed. A molecularly imprinted solid‐phase extraction combined with high performance liquid chromatography coupled with diode array detection was developed for the determination of six steroid hormones, such as estrone, 17‐β‐estradiol, estriol, 17‐α‐ethinylestradiol, progesterone, and testosterone in water samples. The recoveries obtained in the proposed method were in the range of 78.7–101.3%. Matrix effect below 20% suggests that the quantitative and qualitative results of the analysis were not significantly affected by the matrix. The results show that molecularly imprinted polymers based on spherical silica gel had the potential to be a highly innovative and selective sorbent. The proposed method was proved to be applicable for molecularly imprinted solid‐phase extraction in selective and reliable extraction and enrichment of steroid hormones in environmental water samples.