����ICP--MS �����Լ����ӱߵ��������е�15 ��ϡ��Ԫ�ص�ȫ������Ч�����з��������о��˸õ�������ϡ��Ԫ�صĻ����������Ԫ��ȫ��������pH ֵ��ϡ��Ԫ�ػ��Ӱ�졣�������: �ӱߵ���ϡ��Ԫ������Ч̬�����ķֲ���ΧΪ18. 52 �� 118. 02 mg /kg��ƽ������Ϊ56. 75 mg /kg��ϡ����Ч���ռ�ֲ��������Բ���; ����ϡ��Ԫ�صĻϵ��Ϊ0. 23 �� 0. 46���������ض�ϡ��Ԫ�صĻ������Ҫ��Ӱ��; ϡ��Ԫ��ȫ������Ч��֮��Գ���������أ����ϵ��Ϊ0. 480 �� 0. 779��������ϡ��Ԫ����Ч������ȫ������; ��������ϡ��Ԫ�صĻϵ��������pH ֵ����������ء�

The total contents and available contents of 15 kinds of REE in Yanbian area were analyzed by the ICP-MS��and the activation characteristics of REE in soil and the influence of total contents with pH value in soil on the activation of REE were studied�� The results showed that: the contents of available REE in Yanbian area ranged from 18. 52 to 118. 02 mg /kg��averaging 56. 75 mg /kg�� The spatial distribution of available REE had significant differentiation�� The activation coefficient of REE ranged from 0. 23 to 0. 46��which indicated it was greatly impacted by the environmental factors�� The total and available contents of REE in soil had significantly positive correlation�� with its coefficient ranging from 0. 480 to 0. 779��and the available contents of REE were controlled by the total contents�� The activation coefficient of partial REE had great positive correlation with the pH value of soil��