Determining the Carbon, Hydrogen, Nitrogen and Oxygen content of unknowns is one of the most basic and essential needs for any chemist. The analytical method of CHN Corder is based on the complete and instantaneous oxidation of the organic sample by "flash combustion" which converts all organic and inorganic substances into combustion products. The resulting combustion gases (H2O, CO2, N2) are then detected by a thermal conductivity detector which gives an output signal proportional to the concentration of the individual components of the mixture. Elemental analysis determines the amount (typically a weight percent) of an element in a compound, and therefore is particularly useful in determining the elemental composition, the purity and the empirical formula of the unknown compounds. This method is an essential aspect of chemical characterization in natural products, materials science, organic and inorganic synthesis, pharmaceutical products, etc.
With the aid of the Expenses for Improvement of Education and Research in 2001, the center installed a Yanaco CHN CORDER MT-6 Elemental analyzer with an oxygen determination kit. The instrument controlling and the data processing are performed effortlessly on a Windows 98 platform. Analytical data can be easily handled with MS-WORD or Excel.
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Specifications
Elements: C, H, N, S and/or O (with oxygen determination kit)
Measuring range: C: 3-2,600 mg; H: 0.5-400 mg; N: 1-1000 mg; O: 50-1000 mg
Accuracy: < 0.3% absolute
Sample size: 2 mg (weighed with a Sartorius microbalance)
Analysis capacity: 5-10 times / hour; 20 samples can be continuously determined with an autosampler.
Stable time: 90 min. after switching on.
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Equipment and Machines
