Stability test of standard solutions of ruthenium, palladium, iridium, platinum in gold system
WANG Ping1,2,3, HUANG Zhun1,2,3, CHENG You-fa1,2, SUN Bing1,2,3, TIAN Min-min1,2,3
1.National Gold & Diamond Testing Center, Jinan 250014, China; 2.Shandong Institute of Metrology, Jinan 250014, China; 3.Social Justice and Measurement Station of Shandong Province, Jinan 250014, China
Abstract：In order to eliminate the inhibitory effect and interference suppression of gold matrix in gold accessories detection as well as to improve the testing efficiency, the single element standard solution of Ru, Pd, Ir and Pt should be mixed to prepare multi-element standard solution, which was then added into high-purity gold matrix solution to prepare standard solution series. The stability of this mixed standard solution was tested by inductively coupled plasma atomic emission spectrometry (ICP-AES). The testing period was 12 month. The results showed that the correlation coefficients of calibration curves at different stages were higher than 0.999. The t test results also indicated that the concentration of Ru, Pd, Ir and Pt in gold system had no significant changes within a year. The prepared mixed standard solution could be stably kept for long term in darkness at 15-30 ℃.
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WANG Ping, HUANG Zhun, CHENG You-fa, SUN Bing, TIAN Min-min. Stability test of standard solutions of ruthenium, palladium, iridium, platinum in gold system. , 2017, 32(2): 76-80.
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