Determination of Metal Elements in Transformer Oil  with ICP-AES after Microwave Digestion

doi:10.11930/j.issn.1004-9649.2016.08.050.04

Abstract

Abstract: The pretreatment of transformer oil samples must be carried out before the process to determine the metal elements in transformer oil. In order to improve the efficiency of sample treatment, the three-step microwave digestion method is established. Using HNO3-H2O2 as the digestion acid and the method of ICP-AES in combination with the three-step microwave digestion, the Fe and Cu contents in the oil sample are measured. The results show that the RSDs of the two element contents are kept below 2% with the recoveries of standard addition between 98.4% and 101.2%. The analytical results obtained by the three-step microwave digestion method are compared with those by the China electric power industry standard(DL/T 263-2012 )． Verified by t-test at the confidence level of α=0.05, no significant difference is observed between the two methods. This method is simple, rapid and accurate, which is of great significance to detect the metal elements in transformer oil.

Key words: transformer oil, metal element determination, three-step microwave digestion, plasma spectrometry

CLC Number:

LIU Songtao, ZHANG Jing, CHEN Chuanmin, JIA Wenbo. Determination of Metal Elements in Transformer Oil with ICP-AES after Microwave Digestion[J]. Electric Power, 2016, 49(8): 50-53.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2016.08.050.04

https://www.electricpower.com.cn/EN/Y2016/V49/I8/50

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Determination of Metal Elements in Transformer Oil with ICP-AES after Microwave Digestion

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