Effect of calibration curve and observation way on the determination of nickel,chromium and manganese in stainless steel by inductively coupled plasma atomic emission spectrometry
WANG Jin-zhuan1, 2, ZHANG Yu-jie1, 2, FU Rong-jin1, 2, LIU Bin1, 2, LIU Kun1, 2
1.Nanjing Institute of Supervision & Testing on Product Quality, Nanjing 210000, China; 2.National Center of Supervision & Inspection on Building Materials Quality (Nanjing), Nanjing 210000, China
Abstract：The stainless steel materials for ornament and decoration mainly include 200 and 300 series stainless steel. The properties of steel are greatly affected by the content of chemical elements. The element of nickel, chromium and manganese play an important role. Therefore, the accurate determination of these elements is significant. The determination of chemical elements in stainless steel materials is mainly based on the standards including SN/T 2718-2010, GB/T 18705-2002 and SN/T 3343-2012. In these methods, the calibration curves are plotted using the series mixed standard solution with matching of iron matrix. Then, the contents are determined by inductively coupled plasma atomic emission spectrometry(ICP-AES). However, the procedures of previous preparation are complicated and time-consuming. Moreover, the compositions in solution for plotting calibration curve are not fully consistent with those in sample solution, resulting in large uncertainty of measurement. Therefore, the content of nickel, chromium and manganese in stainless steel was determined with the calibration curve prepared by series standard samples of stainless steel. These two methods for preparing calibration curve were compared. The effect of observation way on the determination results was investigated. The results showed that the accuracy of calibration curve prepared by series standard samples of stainless steel was much better than prepared by single standard solution (sample). In addition, the preparation method was simple, which could greatly shorten the detection time. The observation method of inductively coupled plasma atomic emission spectrometry had certain influence on the determination results of stainless steel composition. The radial observation was more suitable for the determination of nickel, chromium and manganese in stainless steel than axial observation.
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WANG Jin-zhuan, ZHANG Yu-jie, FU Rong-jin, LIU Bin, LIU Kun. Effect of calibration curve and observation way on the determination of nickel,chromium and manganese in stainless steel by inductively coupled plasma atomic emission spectrometry. , 2015, 35(1): 45-49.
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