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. ( 2006 ): The Horwitz ratio (HorRat): a useful index of method performance with respect to precision . J. AOAC Int. , 89 , 1095 – 1109 . ISO ( 2005 ): Statistical methods for use in proficiency testing by

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versus concentrations of investigated compounds, and the regression equations were calculated. Each response was the average of three determinations. Precision The intra-day precision (repeatability) was determined by

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.99990 1.8 5.6 Precision, stability, repeatability and accuracy The relative standard deviation (RSD) was taken as a measure of precision, accuracy

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[ 8 ], the bio-analytical method validation described below was performed. Recovery and Selectivity QC samples with three different levels ( n = 6) spiked with 5 ng mL −1 of IS were prepared, and the precision of

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Acta Chromatographica
Authors: Yunfang Zhou, Bingbao Chen, Junyan Chen, Yanwen Dong, Shuanghu Wang, Congcong Wen, Xianqin Wang, and Xiaomin Yu

for 10 min, the supernatant (2 μL) was injected into the UPLC–MS/MS system for analysis. Method Validation Rigorous tests for selectivity, linearity, accuracy, precision, recovery, and stability, according to the

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Acta Chromatographica
Authors: Peiwu Geng, Jing Zhang, Bingbao Chen, Qianqian Wang, Shuanghu Wang, and Congcong Wen

administration in rats. The UPLC–MS/MS method in this study was validated for selectivity, linearity, accuracy, precision, recovery, and stability with a total run time of 3 min. Experimental Chemicals and Reagents

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each peak, draw a standard curve with the peak area against the concentration, and evaluate the linearity of the standard curve. Precision and accuracy The precision and accuracy were evaluated by measuring mouse blood QC samples at in six replicates

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selectivity, linearity, stability, accuracy, and precision. A selectivity study was confirmed by comparing the chromatograms of blank human plasma with that of the spiked plasma to ensure that no endogenous substances were observed at the retention times of

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Acta Chromatographica
Authors: Shaoshi Wen, Zixin Zhang, Xiaopeng Chen, Jinchang Liu, Haiyang Yu, Lifeng Han, Lijun Jin, Yi Zhang, and Tao Wang

limits of quantification), accuracy, precision, stability, and recovery. (a) Linearity and Sensitivity Standard UA solutions were prepared using reagent-grade chemicals at time of use. To prepare the

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Acta Chromatographica
Authors: Ruijie Chen, Mengrou Lu, Xiaoting Tu, Wei Sun, Weijian Ye, Jianshe Ma, Congcong Wen, Xianqin Wang, and Peiwu Geng

solutions at equivalent concentrations, and this peak area ratio is defined as the matrix effect. The matrix effect of the IS was evaluated at a concentration of 50 ng/mL in the similar manner. Accuracy and precision were evaluated by the

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