총 124페이지

OPR Ongoing precision and recovery standard (OPR); a laboratory
blank spiked with known quantities of analytes. The OPR is analyzed
exactly like a sample. Its purpose is to assure that the results produced
by the laboratory remain within the limits specified in this method for
precision and recovery.
PAR Precision and recovery standard; secondary standard that is
diluted and spiked to form the IPR and OPR.
PFK Perfluorokerosene; the mixture of compounds used to calibrate
the exact m/z scale in the HRMS.
Preparation Blank See method blank.
Primary Dilution Standard A solution containing the specified
analytes
that is purchased or prepared from stock solutions and diluted as
needed to prepare calibration solutions and other solutions.
Quality Control Check Sample (QCS) A sample containing all or a
subset of the analytes at known concentrations. The QCS is obtained
from a source external to the laboratory or is prepared from a source
of standards different from the source of calibration standards. It is
used to check laboratory performance with test materials prepared
external to the normal preparation process.
Reagent Water Water demonstrated to be free from the analytes of
interest and potentially interfering substances at the method detection
limit for the analyte.
Relative Standard Deviation (RSD) The standard deviation times
100 divided by the mean. Also termed “coefficient of variation.”
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