Combustion Analysis

When a compound containing carbon and hydrogen is subject to combustion with oxygen in a special combustion apparatus all the carbon is converted to CO₂ and the hydrogen to H₂O (Figure 1). The amount of carbon produced can be determined by measuring the amount of CO₂ produced. This is trapped by the sodium hydroxide, and thus we can monitor the mass of CO₂ produced by determining the increase in mass of the CO₂ trap. Likewise, we can determine the amount of H produced by the amount of H₂O trapped by the magnesium perchlorate.

Figure 1 : Combustion analysis apparatus

One of the most common ways to determine the elemental composition of an unknown hydrocarbon is an analytical procedure called combustion analysis. A small, carefully weighed sample of an unknown compound that may contain carbon, hydrogen, nitrogen, and/or sulfur is burned in an oxygen atmosphere,Other elements, such as metals, can be determined by other methods. and the quantities of the resulting gaseous products (CO₂, H₂O, N₂, and SO₂, respectively) are determined by one of several possible methods. One procedure used in combustion analysis is outlined schematically in Figure 1 and a typical combustion analysis is illustrated in Examples 1 and 2.

Figure 1: Steps for Obtaining an Empirical Formula from Combustion Analysis. (CC BY-NC-SA; anonymous by request)

مواضيع ذات صلة

كيمياء القصدير

تطبيقات الطبقات الثنائية الهيدروكسيد

تطبيقات عملية التبادل الأيوني

مواد التبادل الأيوني Ion exchanger

ظاهرة التبادل الايوني Ion Exchange

تاريخ التبادل الايوني Ion Exchange History

كيمياء البلاتين ومعقداته

كيمياء البلاديوم ومعقداته

طرائق تقدير النحاس

كيمياء النحاس ومعقداته

طرائق تقدير النيكل

كيمياء النيكل ومعقداته