At present, Industrial structure change can be arrived at mainly by two means: absolute change rate and average deviation change rate.
目前，工业结构变动率的计算方法主要有两种：绝对变动率和平均偏差变动率。
Results Total standard deviation of every solution was less than 5% of the concentration or detection limit. The confident limit of total average rate of recovery in sample kept in range of allowable.
结果各种溶液测定的总标准差小于其浓度的5 %或检出限，总平均回收率可信限在允许范围内。
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