Question

Gas Chromatography
57
2. When stationary phase is silica gel ond mobile phase is nitrogen then the
chromatographic technique is called as​

Answer 1

Answer:

Column chromatography in chemistry is a chromatography method used to isolate a single chemical compound from a mixture. Chromatography is able to separate substances based on differential adsorption of compounds to the adsorbent; compounds move through the column at different rates, allowing them to be separated into fractions. The technique is widely applicable, as many different adsorbents (normal phase, reversed phase, or otherwise) can be used with a wide range of solvents. The technique can be used on scales from micrograms up to kilograms. The main advantage of column chromatography is the relatively low cost and disposability of the stationary phase used in the process. The latter prevents cross-contamination and stationary phase degradation due to recycling. Column chromatography can be done using gravity to move the solvent, or using compressed gas to push the solvent through the column.

Explanation:

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Answer 2

Answer:

Concept:

The process of separating substances in a mixture by inserting a liquid and gaseous sample into a mobile phase, commonly referred to as the carrier gas, and passing the gas through a paper chromatography is known as gas chromatography. The mobile phase is often an inert or non-reactive gas such as helium, argon, nitrogen, or hydrogen. A thin layer of highly viscous on a solid particle surface on a neutral solid support inside a column composed of glass or metal tubing is the stationary phase. The stationary phase in some columns could represent the layer of solid particles.

Given:

The chromatographic process is known as when the stationary phase is silica gel and the mobile phase is nitrogen.

Find:

Find the answer for the given question

Answer:

In chemistry, column chromatography is a chromatographic method for isolating a single chemical compound is called mixture. Thin layer chromatography is achieved by coating a piece of glass, metal, or hard plastic with a thin, special coating of silica gel or alumina.

The stationary phase is silica gel (or alumina). In a vertical glass column, the stationary phase, usually silica gel (SiO2) or alumina (Al2O3), is deposited. The liquid mobile phase is added to the top of the column and flows down the column by gravity or external pressure (flash chromatography). The relationship in between stationary and mobile phases, as well as the variable absorption on the fixed and portable phases, is used to separate compounds.

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