The relative standard deviation of the internal standards (PC, PE and SM), which monitor experimental quality throughout extraction and measurement, were 5.6%, 7.9% and 9.7%, respectively.
The standard deviation of the internal noise was defined as σ v) = avb + c (see [ 27, 28] and Supplemental Experimental Procedures).
The clusters are evaluated; clusters with fewer than three members are dropped and clusters where the standard deviation of the internal distances is above an empirically determined threshold are split.
Calibration curves were calculated with a linear regression analysis of the peak area ratios of standard versus the internal standard.
Calibration curves were built with the response ratio (area of the analyte standard divided by area of the internal standard) as a function of the analyte concentration.
The ratio of the peak area of the standard solution to that of the internal standard was used to quantify the compound.
The amount of product formed was calculated using the SRM intensity ratios of the product to the internal standard, the known concentration of the internal standard, and the response ratio (P/IS = 1.104, Figure S8, top, Supporting Information).
The method was validated for qualitative analyses only but to each sample, the internal standards were added and the recovery of the internal standards (criteria S/N of internal standard has to be >3) was used as a sensitivity and recovery check.
Williams said he reported his concern to the Met's directorate of professional standards (DPS), the internal department responsible for investigating misconduct.
The mean (C ) and standard deviation (D ) of the internal state of 10 agents, along 1500 trials.
The mean (E ) and standard deviation (F ) of the internal state of 10 agents, along 1500 trials.
