Sensitivity enhancement in membrane separation flow injection analysis by ultrasound
نویسندگان
چکیده
منابع مشابه
"Reagentless" flow injection determination of ammonia and urea using membrane separation and solid phase basification.
Flow injection analysis instrumentation and methodology for the determination of ammonia and ammonium ions in an aqueous solution are described. Using in-line solid phase basification beds containing crystalline media. the speciation of ammoniacal nitrogen is shifted toward the un-ionized form. which diffuses in the gas phase across a hydrophobic microporous hollow fiber membrane into a pure-wa...
متن کاملEnhancement of non-invasive trans-membrane drug delivery using ultrasound and microbubbles during physiologically relevant flow.
Sonoporation has been associated with drug delivery across cell membranes and into target cells, yet several limitations have prohibited further advancement of this technology. Higher delivery rates were associated with increased cellular death, thus implying a safety-efficacy trade-off. Meanwhile, there has been no reported study of safe in vitro sonoporation in a physiologically relevant flow...
متن کاملEnhancement of the Cooling System Performance of the Proton-exchange Membrane Fuel Cell By Baffle-restricted Coolant Flow Channels
The performance of proton-exchange membrane fuel cell cooling system using coolant flow channels enhanced with baffles was numerically investigated. To do this, the maximum temperature of the cooling plate, temperature uniformity and also pressure drop along the flow channels were compared for different cases associated with number of baffles and their dimensions inside the channels. The govern...
متن کاملUltra-trace Determination of Palladium(II) by Spectrophotometric Flow Injection Analysis
Nowadays, palladium compounds due to their especial characteristics used in different industries, mainly in electrical power sources and chemical productions as a catalyst. Therefore, Pd concentration is increasing in our around that can be contaminant our environment due its toxic effects. In this work, a simple, selective and rapid flow injection method of analysis (FIA) has been developed fo...
متن کاملSelective trace level analysis of phenolic compounds in water by flow injection analysis--membrane introduction mass spectrometry.
Flow injection analysis coupled with membrane introduction mass spectrometry (FIA-MIMS) with on-line derivatization is shown to allow fast, accurate, nearly interference-free, and sensitive (low microgram/L) quantitation of phenolic compounds in water. On-line FIA derivatization of the phenolic compounds is performed by acetic anhydride acetylation in a K2CO3-buffered alkaline medium. The pheno...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Ultrasonics Sonochemistry
سال: 2008
ISSN: 1350-4177
DOI: 10.1016/j.ultsonch.2007.03.005