| Satin of brocade-Zhuang hua is a high-end product in the cloud brocade, in which the gold content of the flat gold line has not been detected. The gold line of cloud brocade line was dissolved with aqua regia. Then ICP-AES method was used to determine the content of gold, silver, and copper. The gold content was calculated according to the relative ratio of the sum of all the main metal elements detected. The precision of the method was 13.1%~16.5% for gold, 2.69%~6.54% for silver, 5.58%~9.92% for copper, respectively. The standard recovery rate is 96.5%~98.0% for gold, 97.4%~100.0% for silver, and 90.4%~ 101% for copper, respectively. |
