Grab sample means an individual sample collected in less than 15 minutes in conjunction with an instantaneous flow measurement.ĭrug sample means a unit of a prescription drug that is not intended to be sold and is intended to promote the sale of the drug.ĭual sample set means a set of two samples collected at the same time and same location, with one sample analyzed for TTHM and the other sample analyzed for HAA5. Matrix spike sample recoveries were used to evaluate the accuracy of Total Organic Carbon Copper and Total Solids were evaluated for accuracy using the recoveries from the laboratory control samples (LCSs).ĭNA sample means any material that has come from a human body and consists of or includes human cells Recoveries for matrix spike and LCS results will be calculated using the following formulas: Matrix Spike Recovery MS R% = x 100 Where:MS R% = Matrix spike recovery percentage SSR = Matrix spike sample result SR = Original sample result SA = Concentration of the spike added to the matrix spike sample. Matrix spike sample recoveries were used to evaluate the accuracy of Antimony, Arsenic, Beryllium, Cobalt, Molybdenum, Selenium, Silver, and Thallium other trace metals were evaluated using the recoveries from the laboratory control samples (LCSs).
#Matrix spike definition verification#
reagent water, or site blanks, etc.) prior to sample extraction/digestion and analysis.Ĭontinuing calibration verification (CCV) (C) Laboratory replicate sample and (D) Matrix spike sample or matrix spike duplicate sample. Matrix spike sample – A matrix spike sample is prepared by adding a predetermined quantity of stock solution of representative analytes to an actual sample matrix (as opposed to an ideal matrix, e.g. Matrix spike sample recoveries were used to evaluate the accuracy of mercury. Matrix spike sample is same as field sample.6.3.8 Not applicable. Matrix spike sample is same as field sample.6.3.6 Not applicable. Matrix spike sample - Matrix spikes and matrix spike duplicate are used both to evaluate the effect of the sample matrix on the recovery of the analyte and to provide an estimate of analytical precision. If contamination is found, its source will be investigated and minimized.2.
Examples of Matrix spike sample in a sentenceĪ laboratory shall prepare and run at least one laboratory control sample with an analytical batch of 10 to 20 samples along with and under the same conditions, including all sample preparation steps, as the other samples in the analytical batch.c.
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