On the one hand, there are the dramatic advances in the fields of column preparation, and of sampling techniques. Implementation of these advances should logically result in correspondingly drastic progress in the average quality of application work in drastic progress in the average quality of ...
where ε is the ratio of interstitial volume to total column volume, i.e. about 0.35–0.40, so thatRis around Φp/5–6. In consequence, the mechanism of HDC in packed or capillary columns may be described by the same parallel capillary model. ...
The organic extract will be analyzed by gas chromatography-mass spectrometry (GC–MS) using deuterated internal standards and an appropriate GC Wax column. Analysis of fatty acid composition of red blood cell phospholipids (RU1) From the tube containing plasma, the buffy layer of white blood ...
its physiological roles outside erythrocytes are largely elusive1,2. Here we found that chondrocytes produced massive amounts of haemoglobin to form eosin-positive bodies in their cytoplasm. The haemoglobin body (Hedy) is a membraneless condensate characterized by phase...
The concentrations of SCFAs including acetate, propionate, butyrate, acetate/propionate (A:P), and total acid (TA) were determined using gas chromatography (Agilent 7820A, Santa Clara, CA, USA) with a capillary column (AE-FFAP of 30 m × 0.25 mm × 0.33 µm, ATECH Technologies...
Female esters, which were present in only small proportions in males, were recovered in the nonhydrocarbon fraction obtained after fractionation of the total extract on a silica-filled microcolumn as a mixture containing 11-heneicosyl, 11-docosyl, 11-tricosyl, 11-tetracosyl, and 11-pentacos...
Goss, J.D.: Improved liquid chromatography of salicylic acid and some related compounds on a phenyl column. J. Chromatogr. A 828, 267–271 (1998) Article CAS Google Scholar Ameyibor, E., Stewart, J.T.: Resolution and quantitation of pentazocine enantiomers in human serum by reversed-phase...
This month's column explores the various types of blanks, and their use to provide further insight to sample preparation schemes. For example, appropriate use of blanks recently solved a riddle in our laboratory. The source of errant peaks in an ultrahigh-pressure liquid chromatography (UHPLC) ...
Biopharmaceuticals have revolutionized the field of medicine in the types of active ingredient molecules and treatable indications. Adoption of Quality by
The resulted crude peptide was purified by reverse-phase HPLC using a Phenomenex Luna C18 (250 × 21.2 mm, 100 Å, 10 μm) column. The appropriate fractions were pooled and lyophilized (purity > 98%) and analyzed using liquid chromatography-electrospray ionization-mass spectrometry. ...