Sensitivity Enhancement by Modifying the Volatile Analyte

Polar compounds, particularly those with an active hydrogen (alcohols, phenols, acids, amines, etc.), usually have low volatility as a result of intermolecular interaction with the polar matrix through hydrogen bond formation. However the reactivity of the active hydrogen can be used to prepare less polar derivatives with better volatility and lower solubility. Simple reactions are preferred, such as esterification, transes-terification, acetylation, etc., which are carried out in the headspace vial during the equilibrium time. An advantage of HS-GC is that the reaction products are less polar and more volatile, thus shifting the equilibrium of the chemical reaction towards completeness.

Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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