Advantages And Disadvantages Of Drying Ashing By Muffle Furnace
Drying Ashing by Muffle Furnace HUANG Y. (1231300018) ZHENG J.Y. (1231300057) BEIJING NORMAL UNIVERSITY – HONGKONG BAPTIST UNIVERSITY UNITED INTERNATIONAL COLLEGE Tangjiawan, Zhuhai City, Guangdong, PR. China December 8th, 2014 ABSTRACT Dry ashing is a process of ashing analysis that burning of organic compounds of a food sample in a muffle furnace via thermal decomposition. As a result, inorganic compounds can be precipitated and weighed by gravimetric analysis. Sometimes sample preparation is needed to improve heating efficiency and prevent sample loss during dry ashing analysis. Muffle furnace is widely used in food analytical to determine element 's concentrations and detect element in the foods. Though muffle furnace has some disadvantages such as loss of volatile minerals, there are more advantages including little or no reagents are required and analysis of several samples simultaneously outweigh those disadvantages. INTRODUCTION Muffle furnace is also known as high temperature furnace. It is a dry ashing instrument used to determine inorganic substances in organic-rich samples in extremely high temperature. Muffle furnace can be heated to temperatures of interest (normally 500°C to 600°C) by conduction and convection from electrical resistance heating which acts as a heat source. Overall, the content in the chamber is heated indirectly, and a temperature control system is needed. MAIN TEXT The analytical principle of dry ashing is that
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