Ignition of Magnesium and Magnesium-Aluminum Alloy by Impinging Hot-Air Stream
Abstract An experimental study on the nonsteady ignition process of magnesium and 50-50 magnesium-aluminum alloy was made by using the stagnation region of an impinging hot air stream. The study has revealed that the ignition of magnesium was caused to occur through a four-stage surface oxidation process and finally through a homogeneous exothermic reaction in the gaseous phase. The ignition mechanism of the magnesium-aluminum alloy was essentially identical with that of magnesium, although the observed ignition behavior was more complicated. The difference could be explained in terms of the aluminum ingredient contained in the oxide film formed on the sample surface.
In present study the use of Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) was investigated for the detection and differentiation of mechanically deboned meat (MDM) content treated with high pressure techniques in meat products. A number of samples of meat products were prepared containing different proportions of MDM and elemental analysis was performed by a multi-element ICP-MS method after microwave assisted acid digestion of processed meat samples in closed vessels acid microwave digestion method. Element concentrations were plotted versus MDM content and obvious differences were observed for certain elements. Among all examined elements, barium presented a clear trend in correlation of its concentration with the MDM content. The results of this preliminary study indicate that it is possible to detect the proportion of % MDM content in processed meat products by its correlation to barium concentration.