水中有機(jī)物監(jiān)測(cè)精密度控制水平研究
《中國(guó)測(cè)試》雜志夏 新1, 米方卓1, 吳曉鳳1, 李 娟2, 池 靖1
夏 新1, 米方卓1, 吳曉鳳1, 李 娟2, 池 靖1
(1. 中國(guó)環(huán)境監(jiān)測(cè)總站,北京 100012; 2. 江蘇省環(huán)境監(jiān)測(cè)中心,江蘇 南京 210036)
摘 要:針對(duì)水中51種有機(jī)物監(jiān)測(cè)的精密度控制水平,提出兩種概率(γ=0.90,P=0.90;γ=0.95,P=0.95)下的質(zhì)量控制指標(biāo)。研究結(jié)果表明:51種有機(jī)物的空白樣品加標(biāo)回收率測(cè)定相對(duì)偏差可控制在15%以內(nèi),實(shí)際樣品和實(shí)際樣品加標(biāo)回收率的相對(duì)偏差可控制在20%以內(nèi),基質(zhì)在一定程度上影響精密度的測(cè)定。
關(guān)鍵詞:有機(jī)物;精密度;質(zhì)量控制;相對(duì)偏差
中圖分類號(hào):X830.5;X832;TQ21;TQ016.1 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1674-5124(2013)04-0005-05
Relative deviation analysis of organic compounds in the water
XIA Xin1, MI Fang-zhuo1, WU Xiao-feng1, LI Juan2, CHI Jing1
(1. China National Environmental Monitoring Center,Beijing 100012,China;
2. Jiangsu Environmental Monitoring Center,Nanjing 210036,China)
Abstract: 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%.
Key words: organic compound; relative deviation; quality control; relative deviation