AS NZS 3580.9.15:2014 pdf free download

AS NZS 3580.9.15:2014 pdf free download
AS NZS 3580.9.15:2014 pdf free download.Methods for sampling and analysis of ambient air
10.1 General
The laboratory shall implement quality assurance procedures to assess the validity of results obtained from the sampling and analysis process. Guidance on quality assurance relating to sample collection can be found in the relevant particulate matter sampling Standard. The AS 3641 and AS 4873 series and EN 14902 provide guidance on the development of an appropriate quality assurance regime covering the extraction and analysis processes. Analytical quality assurance procedures should address the following minimum factors.
10.2 Calibration check
Calibration check solutions are used to check the baseline stability and instrument calibration after measurement of a number of test samples. The calibration blank solution and at least one calibration check solution (usually the mid-range concentration) should be analysed immediately after initial instrument calibration and then at least every tenth sample. If the measured concentration of one of the metals of interest in the calibration blank is greater than three times the method detection limit, or if the measured calibration check solution result has changed by more than ±5% of the initial value, the instrument shall be recalibrated and the analysis repeated.
Calibration check solutions should be replaced at regular intervals. It is good laboratory practice to determine instrument response to a new solution prior to replacement.
10.3 Quality control solutions
Additional quality control practices include checking for contamination (laboratory blank filter and reagent blank solutions), instrument drift and matrix effects (internal standards), method efficiency (recoveries on ‘spiked’ samples), method precision (duplicates) and dilution accuracy (serial dilution).
10.4 Recovery rate check
A method quality control solution from each batch of filters shall be analysed to demonstrate ongoing acceptable method performance in the extraction of metals from the collected particulate matter. Recovery rates of between 85% and 115% should be achievable when using this method. Rates outside this range shall be specifically noted in the report.
10.5 Interference check
If inter-element correlation is included in the method, an interference check solution shall be analysed to verify that the inter-element correction is being performed satisfactorily for the metals concerned.