Discussion on the analysis of chip steel sample by spark discharge atomic emission spectrometry
HUANG Tai-zhong1, 2, ZHOU Xi-lin*1, 2, WANG Jiao-na1, 2, WANG Ya-sen1, 2, YE Fan-xiu3
1. Chong Qing Academy of Metrology and Quality Inspection, Chongqing 401123, China; 2. National Quality Supervision and Inspection Center for Aluminum Magnesium Alloys and Products, Chongqing 408403, China; 3. Wuxi Jin Yi Bo Instrument Technology Co., Ltd., Wuxi 214151, China
Abstract：The chip samples have irregular appearance and certain flowability. Under normal circumstances, the chip samples cannot fully cover the excitation hole of instrument to form a closed argon atmosphere. As a result, they cannot be directly detected by spark discharge atomic emission spectrometry. In order to determine the chip samples by this method, the chip steel samples in experiments were classified. The appropriate sample preparation method was selected based on the strength and hardness of various chip metal samples.The samples with good plasticity and toughness were cold pressure samples, while those with high strength and brittleness and unsuitable for cold pressure samples were melt samples.The prepared samples were quantitatively analyzed using sample control method by selecting the suitable calibration curve. The determined data of ten different positions of sample were used for statistic analysis. The relative standard deviations (RSD, n=10) were all less than 2%, which could meet the level-A requirements in standard JJG 768-2005. The primary and secondary reference materials/samples were used for verification. The differences between the experimental values and the certified values were all within the range of uncertainty specified by the certified reference materials.
韩宗才,兰恩有,丁彦风,等.小直径不锈钢棒样品的火花源原子发射光谱分析[J].冶金分析,2014,34(9):24-28.HAN Zong-cai,LAN En-you,DING Yan-feng,et al.Analysis of stainless steel rod sample with small diameter by spark source atomic emission spectrometry[J].Metallurgical Analysis,2014,34(9):24-28.
