利用王水溶样,活性炭吸附-灰化-王水溶解-硫脲提取-原子吸收光谱法测定微量金标准物质(GAu-9b)的30个子样含量,每个子样重复测定3次。分析了天平称量精度、玻璃器皿刻度精度和活性炭吸附率造成的测量不确定度,估算出合成不确定度范围为1.6%~2.2%( A级品),论证了分析测定方法的可行性;对单个样品重复分析结果的可靠性及样品的均匀性进行评估,计算出样品均匀性质量参数为0.77,样品测定结果的相对偏差( RD)均符合地质实验室质量管理规范要求,依此判定该样品的均匀性质量等级为合格。%30 sub-samples of the standard substance of trace gold GAu -9b( unvalued standard sample ) are meas-ured by the process of aqua regia dissolution ,activated carbon adsorption -ashing-the aqua regia dissolution-thiou-rea extraction-AAS,and each sample measured for 3 times.The measurement uncertainty range is estimated to be 1. 6 %to 2.2%(Grade A) after the analysis of the weighing accuracy of the balance ,the scale accuracy of glass wares and the measurement uncertainty caused by activated carbon adsorption ,proving the feasibility of the method;Evalua-tion on the credibility of repeated assaying results of each sample and the homogeneity is carried out ,the quality pa-rameter of homogeneity is 0.77,the RD of the measurement result is consistent with quality management standard re-quirements of geolabs ,thus the homogeneity quality is thought to be acceptable .
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机译:目的:通过使用组织学结果作为参考标准,研究ELASTPQ测量对良性和恶性局灶性肝病变(FLLS)的鉴别诊断的价值。材料和方法:共有154名患者。对测量剪切波速度(SWS)的每个病变进行ELASTPQ测量。评估了FL1与周围肝脏的SWS和SWS比的差异,研究了切断值。接收器操作特征(ROC)曲线被绘制以评估诊断性能。组织学作为金标准通过患者的手术获得。结果:共有154例病变,包括129名(83.7%)恶性FLLS和25(16.3%)良性物质。 SWS的恶性和良性FLLS显着差异,2.77±0.68 m / s和1.57±0.55 m / s(p <0.05)。对于良性FLL的恶性为2.23±0.36,每个FL1与周围肝实质的SWS比为2.23±0.36(P <0.05)。差分诊断的切断值为SWS和SWS比率为2.06米/秒。结论:ELASTPQ测量提供了FLLS的可靠定量刚度信息,可能有助于恶性和良性FLL之间的差异诊断。