TAILIEUCHUNG - Synthesis the reversed stationary phase for solid phase extraction using trimethoxyoctadecyl silane

The material was also undergone the end-capping process to reduce unreacted silanol groups. Final product owned % of carbon content and 75 % of the unreacted silanols. Retention behavior of product was tested and compared to the same noes available on the market. Results showed that both resulted material and commercial had the same retention properties. | TAÏP CHÍ PHAÙT TRIEÅN KH&CN, TAÄP 19, SOÁ T1 - 2016 Synthesis of the reversed stationary phase for solid phase extraction using trimethoxyoctadecyl silane Nguyen Tien Giang Nguyen Huy Du Nguyen Anh Mai University of Science, VNU-HCM (Received on July 20 th 2015, accepted on March 31 th 2016) ABSTRACT Octadecyl grafting silica was synthesized using groups. Final product owned % of carbon trimethoxyoctadecyl silane. Reaction conditions were content and 75 % of the unreacted silanols. Retention optimized so that the carbon percentage of resulted behavior of product was tested and compared to the material was similar to that of commercial products. same noes available on the market. Results showed Temperature and catalyst played very important roles that both resulted material and commercial had the same retention properties. in the reaction. The material was also undergone the end-capping process to reduce unreacted silanol Key words: reversed stationary phase, octadecyl modified silica, alkoxysilane, solid phase extraction INTRODUCTION Solid phase extraction (SPE) is a well-established sample pretreatment technique because it demands less organic solvents and can remove interferences simultaneously. In SPE chemical structure of sorbent materials play a decisive role[1]. Currently, the most popular sorbent material is conventional reversed phase (CRP) on silica support. In the current study, CRP sorbent was synthesized using alkoxyoctadecyl silane and its retention properties were compared with commercial CRPs. CRP is synthesized by directly bonding alkoxyoctadecyl silane or chlorooctadecyl silane onto silica surface[2-5]. While chlorolsilane is very reactive, alkoxysilane is one of the least reactive reagents[3]. However, during the reaction with silica, chlorosilane produces HCl by-product which can damage the main product. For alkoxysilane, the byproduct is alcohol which is harmless and easy to remove in distilled conditions. Besides, the .

• Hoá học
• Synthesis of the reversed stationary phase
• The reversed stationary phase
• Reversed stationary phase
• Octadecyl modified silic
• Solid phase extraction
• Octadecyl modified silica
• Trimethoxyoctadecyl silane
• Reduce unreacted silanol groups
• Journal of Chemistry
• Multiwalled carbon nanotubes
• Accurate solid phase extraction method
• Flame atomic absorption spectrometry
• Chromatography A
• Glycoprotein glycans
• Online cleanup liquid chromatography
• High performance liquid chromatography
• Công nghệ hóa
• Spectrophotometric determination
• Anionic surfactants
• Water byflow injection analysis
• Solid phase ion pair extraction
• Hóa vô cơ
• BMC Chemistry
• Conjugated steroid hormones
• Liquid chromatography tandem mass spectrometry
• River water
• Azadirachta indica
• Online solid phase extraction
• Method validation
• Liquid chromatography
• Diethylene triamine pentacetate acid
• Portable equipment
• Inductively coupled plasma mass spectrometry
• Azo dyes
• Metal–organic framework
• Pipette tip solid phase extraction
• Response surface methodology
• Box–Behnken design
• Seawater analysis
• Magnetic solid phase extraction
• Coriolus versicolor immobilized γ Fe2O3 nanoparticles
• Nonessential element
• Fourier transform infrared
• Polycyclic aromatic hydrocarbons
• Nanometal oxide
• Electrothermal atomic absorption spectrometry
• Ammonium pyrrolidine dithiocarbamate (APDC)
• Trace elements
• Organometallic compounds
• Biological systems
• Environmental advances
• Benzophenone type ultraviolet filters
• Core shell silica microspheres
• Dispersive solid phase extraction
• Capillary electrophoresis tandem mass
• Dispersive micro solid phase extraction
• Polydopamine coated magnetite nanoparticles
• Sodium dodecyl sulfate micellar eluents
• Antidepressant drugs
• Chemical syntheses
• Anionic exchange solid phase extraction
• Quick alternative
• Weak anion exchange sorbent
• Hydrophilic interaction
• Ion exchange
• Mixed mode solid phase extraction
• Human plasma
• Mass spectrometry
• Phosphoproteomic analysis
• Cell line digests
• Zwitterionic pesticides
• On line solid phase extraction
• Liquid chromatography mass spectrometry
• Aminomethylphosphonic acid
• Imidazolium ionic liquid
• Phenolic resin
• Benzoylurea plant hormone
• 3D printing
• Forensic science
• Complex matrices
• Turkish Journal of Chemistry
• Tạp chí Hóa học
• Molecular imprinted polymers
• Nonimprinted polymer
• Volatile organic compounds
• Freeze dry
• Metabolic pathways
• Solid phase micro extraction
• Biogenic amines
• Capillary electrophoresis
• Hierarchical cluster analysis
• Solid phase microextraction
• In tube extraction
• Vacuum transfer in trap
• Reduced pressure sampling
• Dairy matrix