This paper describes the method and way for traceability of chemical metrology. The efficieflt primary reference materials were prepared and the reliable analysis method -IDMS was established for transmitting quantity and traceability of chemical metrology, to introduce the results of international cooperation study.
The paper was described that the rice was digested by HNO3-HCIO4.A lot of organic materials were removed. Strong base type anion exchange resin (T910#) were used to separate a large number of K. Na. Ca. Mg and other metal ions in the rice. Then, the trace Cd was determined by IDMS. the results were perfectly satisfaction.
