Serum Phospholipide Analysis by Chromatography and Infrared Spectrophotometry

Analysis for carboxyhemoglobin by gas chromatography and multicomponent spectrophotometry compared.

Measurements of carboxyhemoglobin (HbCO) by gas chromatography (GC) were compared with those obtained by multicomponent spectrophotometric analysis (MCA). Correlation was good for HbCO ranges (proportion of total hemoglobin) of 1.5 to less than or equal to 5% (GC = 0.94 MCA + 0.37%, n = 25, r = 0.98); 5.0 to less than or equal to 10.0% (GC = 0.89 MCA + 0.63%, n = 19, r = 0.93); greater than 10%...

Paraffinoma confirmed by infrared spectrophotometry.

The phospholipide and phospholipide-fatty-acid composition of human serum lipoprotein fractions.

Previous studies on human serum phospholipids have dealt with concentration in whole serum (l-3). With the introduction of the concept of lipoproteins (4) and lipoprotein classes (5) it became of interest to study the phospholipids of serum as structural units of these macromolecules. Whereas there is now agreement on the relative proportions of the phospholipid species in whole serum, it has n...

Portable Refrigerant Identification by Near Infrared Spectrophotometry

Simultaneous Determination of Triglycerides and Cholesterol Esters in Serum by Infrared Spectrophotometry.

With the use of a high-resolution grating infrared spectrophotometer, it is possible to analyze mixtures of cholesterol esters and triglycerides on the basis of the difference in their ester carbonyl absorption frequencies. In the analysis of serum lipids, the preliminary removal of phospholipids is accomplished by a simple batch adsorption on silicic acid. Infrared absorbance measurements are ...