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This book will provide a basic introduction to 15 different types of liquid and gas chromatography. The relationship between each 16 type of chromatography is illustrated in Figure 1.1. Principles of gas chromatography (GC) will be covered 15 in Chapter 2, liquid chromatography (LC) in Chapter 3, capillary electrophoresis The principle of gas chromatography Components in the mixture are distributed between two phases, one of which is a stationary phase, and the other is a mobile phase gas, or carrier gas, that carries the mixture through the stationary phase. Compounds in the mobile phase interact with the stationary phase as they pass through. The purpose of coupling GC with MS is to provide identification of an analyte of interest without requiring further analysis. GC can separate many volatile and semi-volatile compounds but not always selectively detect the constituents. The MS can selectively detect many compounds (by fragmentation pattern) but not always separate them. This article will first explain the principles of mass spectrometry in terms of the most basic required instrumentation and the way a measurement is made, followed by an explanation of the mass spectrum, which is the data resulting from an MS measurement. Mass spectra contain a great deal of information that can be complicated to interpret. On the basis of the Principles, it is the role of government, semi-government or private sector initiatives to assess the quality of the corporate governance framework and develop more detailed mandatory or voluntary provisions that can take into account country-specific economic, legal, and cultural differences. A mass spectrometer is an analytical instrument that produces a beam of gas ions from samples (analytes), sorts the resulting mixture of ions according to their mass-to-charge (m/z) ratios using electrical or magnetic fields, and provides analog or digital output signal (peaks) from which the mass-to-charge ratio and the intensity (abundance) of each Working Principle: The GC works on the principle that a mixture will separate into individual substances when heated. The heated gases are carried through a column with an inert gas (such as helium). As the Basic charges: Type of Analysis Pricing Academic Industry Sample Type View PDF; Download Full Volume; Journal of Chromatography Library. Volume 10, 1977, Publisher Summary. This chapter discusses the basic principles of gas chromatography (GC). Separation in GC is based on different distributions of the molecules of the components being separated between the mobile gas phase and the stationary phase INTRODUCTION:- Gas chromatography - "It is a process of separating component (s) from the given crude drug by using a gaseous mobile phase." It involves a sample being vaporized and injected onto the head of the chromatographic column. The sample is transported through the column by the flow of inert, gaseous mobile phase. Majorly, there are two gas chromatography types into which it is classified - GLC or gas-liquid chromatography and GSC or gas-solid chromatography. Both the methods use either liquid or solid as a stationary phase while using gas as the mobile phase. In Gas-solid chromatography, the retention of analytes is due to physical adsorption.