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KMID : 0385520140270060352
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Analytical Science & Technology
2014 Volume.27 No. 6 p.352 ~ p.356
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Determination of boron in steel by HNO3-NH4HF2 digestion and ICP-MS
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Choi Won-Myung
Eum Chul-Hun
Park Il-yong
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Abstract
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Various studies have been done to improve the properties of the steel by adding boron to the steel. Some studies have reported on the analysis of the boron in steel by AAS (atomic absorption spectrometry), ICPOES(inductively coupled plasma-optical emission spectrometry), ICP-MS (inductively coupled plasma/mass spectrometry). The volatile loss of boron of steel in sample digestion and the separation procedure for avoiding matrix effect by high concentration of iron are difficulties for determination of boron in steel. The method to determine boron in steel by ICP-MS was developed without volatilization of boron in sample digestion step with HNO3-NH4HF2 digestion method, and the additional separation process for avoiding matrix effect. Complete decomposition of steel with HNO3-NH4HF2 digestion method, and boron determination by ICP-MS in the matrix of high concentration of iron were possible. Quantitative recoveries of boron in certified standard steel by new method in this study were 103 to 111%, and the relative standard deviation is less than 5%. The method detection limit was 1.17 μg/g.
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KEYWORD
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steel, boron, ammonium bifluoride, ICP-MS,
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