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| Uncertainty Analysis for Determination of Zn, Mn, Al Elements in Magnesium Alloy by ICP- OES and Microwave Digestion System |
| Received:July 15, 2018 Revised:August 25, 2018 |
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| DOI：10.7643/ issn.1672-9242.2018.08.010 |
| KeyWord:magnesium alloy ICP-OES microwave digestion uncertainty |
| Author | Institution |
| LI Chun-mei |
a. College of Materials Science and Engineering; b. Electron Microscope Center; c. National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing , China |
| LIU Chuan-pu |
a. College of Materials Science and Engineering; b. Electron Microscope Center; c. National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing , China |
| WAN Ti-zhi |
a. College of Materials Science and Engineering; b. Electron Microscope Center, Chongqing University, Chongqing , China |
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| Abstract: |
| Objective To improve the accuracy of the analysis results of AZ61 magnesium alloy elements by studying the uncertainty factors in the analyzing alloying elementary composition. Methods The sample was digested by a microwave digestion instrument. The contents of Zn, Mn, Al in AZ61 magnesium alloy were determined by inductively coupled plasma emission spectrometer (ICP-OES). The uncertainty factors in the test process were analyzed, evaluated and calculated. Results When determining contents of Zn, Mn and Al in magnesium alloy with the microwave digestion-ICP-OES method, the measurement uncertainty were mainly caused by dilution of sample solution, liquid-transfering gun, standard curve and repeatability. The contents of AZ61 magnesium alloy were Zn (1.1270%±0.0433%), Mn (0.1797%±0.0064%), Al (6.4468%±0.2029%). Conclusion Based on analysis and evaluation of uncertainty, the accuracy of the results can be guaranteed and the performance of magnesium alloys can be better controlled so that the environment adaptability of magnesium alloy can be improved. |
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