期刊论文

Cao, L

英文

Analytical and Bioanalytical Chemistry

1618-2642

2002

372

2

397-400

10.1007/s00216-001-1140-7

Two examples given in this paper show the increasing demand for certified values of these ultra-trace elements in CRM. Biological CRM certified for REE are urgently needed in a national project entitled “Chemical Behavior and Ecological Impact of Rare Earth Elements in Micro-Fertilizer” supported by the National Science Foundation of China (NSFC). It can be seen from Table 1 [2] that none of the REE were certified in these two CRM, even though human hair is a good indicator of human exposure. Because of the lack of such CRM, a subproject was launched to determine and eventually certify some REE in two existing CRM, GBW 08503 (Wheat Powder) and GBW 09101 (Human Hair). Our laboratory participated in the above sub-project using RNAA. In this paper, procedures

本校为第一且通讯机构

Radiochemical neutron activation analysis (RNAA) has been used for the determination of eight rare earth elements (La, Ce, Nd, Sm, Eu, Tb, Yb, and Lu) in two Chinese certified reference materials (CRM), GBW 08503 (wheat powder) and GBW 09101 (human hair). These determinations are important for possible certification of the above mentioned ultra-trace elements, so far not certified. A simple one-step (REE)F3 precipitation was used. Chemical yields were determined for all relevant elements by means of tracer experiments. The two CRM were also analyzed by inductively coupled plasma-mass spectrome...