In recent years, high pressure liquid chromatography (HPLC) has been used for the analysis of triglycerides as well as for other related materials. Specialized gas chromatography columns have been developed for the separation of long-chain fatty acids such as the methyl esters. These columns have ...
Commonly used: Packed columns and Capillary columns (More popular) Component of a Column – Oven The column is enclosed by a column oven which is responsible for maintaining a constant temperature during isothermal operation. This temperature when temperature programming is needed can be increased in...
Determination of 23 organochlorine pesticides in soil and sediment by gas chromatography coupled with dual columns and dual electron capture detectorsorgan... Determination of 23 organochlorine pesticides in soil and sediment by gas chromatography coupled with dual columns and dual electron capture detectors...
The initial partition-chromatography system presented difficulties because of lack of reproducibility in the properties of the silica gel and lack of uniformity in the packing of columns. Partly for this reason, Martin and his coworkers worked out a new procedure in which the stationary medium was...
time and place. Peat, coal, and wood were the fuels used historically, while the fuels of choice today are coal,natural gas, and oil. The high steam requirement for continuous-still operationinhibitedthe development of rectifying columns for production of spirits until after theIndustrial ...
All columns were tested by injections of working solutions containing 20 parental PAHs from molecular weight of 128 to 278 g/mol and 48 alkylated PAHs from molecular weight of 142 to 280 g/mol on a one dimensional gas chromatography-mass spectrometry (GC-MS) system. The SLB PAHms column ...
Electron-capture gas chromatography was employed in studying the behavior of 11 chlorinated insecticides in eight types of soil under controlled laboratory conditions to provide a better basis for understanding and predicting the fate of such pesticides in the field. Factors studied were volatilization, ...
The roles of sphingolipids in polycystic ovary syndrome (PCOS) are still unknown. This study aimed to investigate the sphingolipid characteristics for different types of PCOS using liquid chromatography-mass spectrometry (LC-MS). A total of 107 women with PCOS and 37 healthy women as normal contro...
The standard procedure recommended by the American Society for Testing and Materials (ASTM International) is D5501, which outlines gas chromatography. The method requires the use of extended columns, temperature control, and specialized gravity computations, as well as high apparatus procurement and ...
88%, limits of detection within the range 0.02–0.67 ng mLÀ1 and coefficients of variation <11% for the column renewable mode. MSFIA Coupled with Monolithic Columns (MSC) The recent advent of monolithic columns has opened new possibilities in flow analysis (Ferna´ndez et al. 2009). ...