The precision of measurements, expressed as the relative SD of 55 66 measures, depending on the analyte, was 5.8 12.1% for QCLs and 4.4 5.6% for QCHs.
As one can see from the comparison of results in Fig. 3a c, decrease of the mass of particles causes the decrease of precision of measurements (or increasing of the noise level in the measured signal).
The precision of measurements, expressed as the relative standard deviation of 55 66 measures, depending on the analyte, was 5.8 12.1% for QCLs and 4.4 5.6% for QCHs.
The precision of measurements, expressed as the relative standard deviation of multiple measures, depending on the phthalate metabolite, was 8 10% for low-concentration and 6 10% for high-concentration quality control samples.
Instrumental precision of measurements was between 5% and 10%, which is very low compared with the range of measured concentrations.
To increase the precision of measurements, empirical calibration of the line-shifter is required by using closely positioned telluric lines.
Studies using static probing guarantee the precision of measurements and reliability of results which are of fundamental importance for the entire design process.
In addition, the precision of measurements in terms of the relative standard deviation (RSD) and the signal to noise (S/N) ratios were also improved.
The precision of measurements is further improved by the use of mobility ratios to report mobility changes (RSD% less than 0.5% in a long-term measurement, n = 300 600).
The purpose of this study is to characterize the accuracy and precision of measurements for particulate matter less than 2.5 μm (PM2.5) from the latest generation of the RDI sampler for use in relatively low concentration environments.
This uniqueness is based on the scale of observations, precision of measurements, the ability to modify experiments as logic and technology dictate, and the ability to use instruments free of the constraints on mass, power, reliability, and data rate of flight instruments.
