水中有机物监测精密度控制水平研究

Relative deviation analysis of organic compounds in the water

针对水中51种有机物监测的精密度控制水平,提出两种概率(γ=0.90,P=0.90;γ=0.95,P=0.95)下的质量控制指标。研究结果表明:51种有机物的空白样品加标回收率测定相对偏差可控制在15%以内,实际样品和实际样品加标回收率的相对偏差可控制在20%以内,基质在一定程度上影响精密度的测定。

Through analyzing the monitoring data, the authors studied the relative deviation of 51 organic compounds in water, and put forward the quality control （QC） index under two kinds of probabilities （γ=0.90, P=0.90; γ=0.95, P=0.95） to provide the QC index for the people in the monitoring area. Studies indicate that the relative deviation of the actual samples and the recoveries of actual samples are higher than those of the blank samples. The relative deviation of the blank sample recovery could be controlled within 15% , which could be extended appropriately. The relative deviation of the actual samples and the actual sample recovery could be controlled within 20%.