Matrix spike recovery calculation

• [DOC File]Ohio EPA Home

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  Table 7.2 Matrix Spike QA/QC Summary Data Batch ID: C9567 QC Sample ID: C0009184-23MS Sample Affected: C0009184-23 Analytes Result (µg/Kg) % Recovery QC Limits Spike Level (µg/Kg) RPD RPD Limits 1,1-dichloroethene 75.6 117 70-130 64.7 Benzene 50.6 74.0 70-130 64.7 N-hexane 36.9 44.5 70-130 64.7 Toluene 55.0 73.6 70-130 64.7 Chlorobenzene 39.3 ...

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• [DOC File]ISSUED REPORT - US EPA

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  4. NO Matrix Spike sample in batch per SOP QC requirement. 5. Lab Duplicate RPD calculated using the wrong samples (samples 0227-118-1 and 0227-118-2 were used for the calculation. Thus, it appears that the RPD QC requirement was met when in fact it was not: see below. 6.

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• [DOCX File]National Analytical Management Program

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  Matrix spike samples for which the sample activity is greater than five times the spiking level are not required to meet this criterion. ... Does the laboratory document the calculation for percent recovery (%R), relative percent difference (RPD) or other statistical treatment used?

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• [DOC File]NC DENR/DWQ LABORATORY CERTIFICATION

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  Jan 31, 2020 · 61 How is the percent recovery of the MS calculated? [NC WW/GW LC Matrix Spike Technical Assistance] ANSWER: See Matrix Spike Technical Assistance document. If the spike solution volume constitutes >1% of the total sample volume, the sample concentration or spike concentration must be adjusted by calculation.

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• [DOC File]Ohio EPA Home

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  2.3.1 Is matrix spike/matrix spike duplicate recovery data present? Action: If the matrix spike/spike duplicate data are missing, the laboratory should be contacted for a re-submittal. 2.3.2 How many VOC spike recoveries are outside the QC limits? Record the spike recovery and control limits:

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• [DOC File]Accuracy Control Chart

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  Determining Matrix Spike Percent Recovery. Calculate as follows: *Please see the QA Manual, page 28 for instructions on determining the spike amount. The above calculation is done for you in the companion Matrix Spike Control Chart. Enter the testing date in column A, the Unspiked sample value in column B, the Spiked sample value in column C ...

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• [DOCX File]SPIKE RECOVERY AND DETERMINING A ... - …

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  The method detection limit (MDL) of the Ascorbic Acid Method for Phosphorus Determination will be determined and a spike recovery analysis will be performed on a lake water sample to determine whether the analytical signal (absorbance) depends on the matrix the analyte (phosphorus) is in.

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• [DOC File]National Analytical Management Program

  https://info.5y1.org/matrix-spike-recovery-calculation_1_dc2dc6.html

  TNI EL-V1M6-2009, Section 1.7.2.3 a) iv) 8.9.6 Matrix Spike Acceptance Criteria. Are matrix spike recoveries within the control limits of 60 - 140%, or as specified by client? NOTE: Matrix spike samples for which the sample activity is greater than five times the spiking level are not required to meet this criterion.

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• [DOC File]QUALITY ASSURANCE MANUAL

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  Calculating Matrix Spike Recoveries. The following Equation #1 is used to calculate the percent recovery for matrix spike samples when the spike added results in a sample dilution of ≤1%: % Recovery = observed - background x 100. spike amount. Where: observed = the concentration measured in the spiked sample (mg/L)

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