نتایج جستجو برای: hplc.

تعداد نتایج: 33182  

Journal: :Journal of Pharmaceutical and Sciences 2023

Validasi metode analisis adalah suatu proses dalam menjamin akurasi analisis, reprodusibel, spesifik dan stabil dari kisaran sesuai dengan tujuan penggunaan. mencakup semua prosedur yang menunjukkan pengukuran kuantitatif analit matriks biologis seperti plasma. Penentuan konsentrasi obat plasma merupakan hal kompleks karena kompleks. Metformin agen antihiperglikemik oral digunakan pengelolaan d...

Journal: :Kobunshi 1994

Journal: :Bioanalysis 2015

Journal: :Analytical chemistry 2013
Karsten G Kraiczek Gerard P Rozing Roland Zengerle

Absorption spectrophotometry has been and still is the industry standard for detection in HPLC. Limit of detection (LOD) and linear dynamic range (LDR) are the primary performance requirements and have driven continuous improvement of spectrophotometric HPLC detectors. Recent advances in HPLC column technology have led to low flow-rate HPLC such as capillary HPLC and nanoflow HPLC and put highe...

2010
Michael Swartz

& In an HPLC system the detector is the component responsible for turning a physical or chemical attribute into a measureable signal corresponding to concentration or identity. In the early days of HPLC, detection was often carried out by collecting fractions and analyzing them off-line. It wasn’t until the 1940’s and 1950’s that the first online detectors for HPLC were introduced. Certainly an...

Journal: :Journal of oleo science 2009
Ayano Yoshie Ayato Kanda Takahiro Nakamura Hisao Igusa Setsuko Hara

Although there are various determination methods for gamma -oryzanol contained in rice bran oil by absorptiometry, normal-phase HPLC, and reversed-phase HPLC, their accuracies and the correlations among them have not been revealed yet. Chloroform-containing mixed solvents are widely used as mobile phases in some HPLC methods, but researchers have been apprehensive about its use in terms of safe...

Journal: :Lebensmittel-Wissenschaft & Technologie 2021

Non-targeted strategies based on high-performance liquid chromatography with ultraviolet detection (HPLC-UV) and fluorescence (HPLC-FLD) fingerprints were evaluated to accomplish the classification authentication of instant coffee (40 samples), decaf (26 chicory (22 samples, including both ground instant), as well detect quantify frauds adulteration by multivariate chemometric methods. HPLC-UV ...

2012
Alyssa R. Atwood Julian P. Sachs

We present two new methods for purifying dinosterol (4a,23,24-trimethyl-5a-cholest-22E-en-3b-ol) from sediments for the purpose of hydrogen isotope analysis via gas chromatography–isotope ratio mass spectrometry (GC–IRMS). The first method uses reversed phase-high performance liquid chromatography (RP-HPLC) to purify dinosterol from structurally similar 4a-methyl sterols that co-elute on GC ana...

2008
Richie Ryan Sheila Donegan

502 What is MELC? Microemulsions are stable, isotropically clear solutions consisting of an oil (such as octane) and water stabilized by a surfactant and co-surfactant. To form such a mixture the interfacial tension between the oil and water has to be decreased by the addition of both a surfactant and a cosurfactant. Sodium dodecyl sulphate (SDS) is a common and widely used surfactant.1,2 Mediu...

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