نتایج جستجو برای: micro solid phase extraction
تعداد نتایج: 1006708 فیلتر نتایج به سال:
In this study, a method for the determination of organic micro-pollutants, i.e. personal care products such as synthetic musk fragrances, household bactericides, organophosphate flame retardants and plasticizers, as well as phthalates in sludge, has been developed. This method is based on lyophilisation and accelerated solvent extraction followed by clean-up steps, i.e. solid phase extraction a...
abstract: in this study, an analytical method is developed to determine 15 polycyclic aromatic hydrocarbons (pahs) in olive and refined pomace olive oils using hplc coupled with a fluorescence detector. the standardised method of ultrasound-assisted solvent extraction consisted of liquid–liquid extraction with organic solvent and purification on c18 and florisil bonded-phase cartridges was modi...
A new fast screening method has been developed for the analysis of organochlorine pesticides in water that takes less than 10 min to perform and has detection limits of the order of 10 ng l21. Pesticide extraction was achieved by solid-phase microextraction and the separation was performed using a micro-bore (0.1 mm) capillary column. A laboratory-built cryotrap system was used to focus the ana...
This application presents a fast, easy, and cost-effective method for the determination of 24 pesticide residues in red wine. Sample preparation involves the extraction of pesticides from red wine using the QuEChERS extraction method (AOAC version). The samples then undergo cleanup by dispersive solid-phase extraction (dSPE) using primary secondary amine (PSA) sorbent, which effectively retains...
The tosylation reaction of endocrine-disruptive alkylphenolic compounds in a solid-phase aqueous system was investigated with the aim of developing an environment-friendly and efficient derivatization method for HPLC analyses of environmental samples. The phenols were rapidly and efficiently converted to the tosyl derivatives on a commercially available ODS solid-phase cartridge by passing an a...
Sea sand disruption method (SSDM) and matrix solid phase disruption (MSPD) were compared to solid-liquid extraction (SLE) for extraction of phenolic compounds from the Ficus carica leaves. Statistical treatment, ANOVA-single factor, was used to compare the extraction yields obtained by these methods, and for the majority of the extracted compounds, significantly higher yields were obtained by t...
Introduction: In this research the solid phase micro extraction (SPME) for sampling and determination of carbon tetrachloride and chloroform in air was developed and effect of ambient parameters on SPME was assessed. Methods: For this purpose standard chamber was built in the laboratory. The concentrations of compounds in the chamber were measured with SPME. The optimum condition for extract...
Background and aims: Cadmium is a common industrial and environmental contaminant causing adverse health effects on respiratory system and kidney. This has been classified as a human carcinogen. Biological monitoring of cadmium and its measurement in urine, hair, and nail samples can be considered as an evaluation of the internal dose. Because of trace concentration of analytes in biological sa...
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