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Magnetic solid-phase extraction coupled to high-performance liquid chromatography (HPLC)-diode array detection method has been developed for the sensitive analysis of Anastrozole (ANA) and Letrozole (LET) in human urine samples. Characterization studies of the newly synthesized material (Fe3O4@TEPA) were carried out by Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction, Raman spectroscopy, and scanning electron microscope techniques. The method has provided linearity for both the analytes (r2 > 0.9900) in the range of 4.00–160.00 ng mL−1. The limit of detections for ANA and LET was found to be 1.14 and 1.26 ng mL−1, respectively. The limit of quantification for ANA and LET was obtained 3.78 and 3.86 ng mL−1, respectively. The new method was simple, convenient, fast, and suitable for the direct analysis of ANA and LET in urine samples. Finally, the developed method was applied to the spiked human urine samples to test accuracy and repeatability. Recovery values for each of the molecules were calculated in the range of 93.4–108.0% (n = 3) at two concentration levels, while % RSDs were lower than 6.2%. Graphical abstract
(Elsevier, 15.04.2022)
A new Polyacrylamide (PAA)-Vermiculite (V) composite was synthesized and characterized with the help of FTIR, SEM, and PZC analyses. The effects of ion concentration, pH and ionic strength parameters to adsorption process ...
Determination of phenolic compounds in human saliva after oral administration of red wine by high performance liquid chromatography
(Elsevier, 05.02.2022)
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Outline
Highlights
Abstract
Keywords
1. Introduction
2. Materials and methods
3. Results and discussion
4. Conclusions
Declaration of Competing Interest
Acknowledgments
Appendix A. Supplementary ...
Application of cloud point extraction for residues of chloramphenicol and amoxicillin in milk samples by HPLC–DAD
(Springer, 2022)
A pre-concentration and sensitive determination method for residues of Chloramphenicol (CLP) and Amoxicillin (AMX) in milk samples were developed based on cloud point extraction (CPE) and HPLC–DAD analysis. CLP and AMX ...
Synthesis, characterization, and application of polyacrylamide/carmine polymer nanomaterial as an effective solid-phase material for ultrasonic-assisted solid-phase microextraction of aluminum and chromium in vegetable samples
(2022)
Here, a new and inexpensive polymer nanomaterial consisting of polyacrylamide and carmine (PAM-CR) was synthesized to provide selective extraction of aluminum and chromium from vegetable samples prior to their determination ...
Application of a new dithizone grafted polymeric adsorbent for solid phase microextraction of manganese and copper prior to FAAS in fortified vegetables and barbecue samples
(13.06.2022)
A new potential solid phase material called as dithizone@PAA was synthesized for first times, characterized and utilized as an easy versatile polymeric sorbent for the shake-assisted dispersive solid-phase micro-extraction ...
Novel Applications of Microextraction Techniques Focused on Biological and Forensic Analyses
(MDPI, 15.02.2022)
In recent years, major attention has been focused on microextraction procedures that allow high recovery of target analytes, regardless of the complexity of the sample matrices. The most used techniques included liquid-liquid ...
Sensitive determination of Anastrozole and Letrozole in urine samples by novel magnetic nanoparticles containing tetraethylenepentamine (TEPA) prior to analysis by high-performance liquid chromatography-diode array detection
(Springer, 20.02.2022)
Magnetic solid-phase extraction coupled to high-performance liquid chromatography (HPLC)-diode array detection method has been developed for the sensitive analysis of Anastrozole (ANA) and Letrozole (LET) in human urine ...