A. LOD check. Using one of the sz spectra, calculate the RSA values (see APPENDIX B section B2) and LOD value (see Appendix E,section E1) in the analytical regions pertaining to the test analytes. verify that the system path length (see APPENDIX B, section B1), current RSA values, and current LODs are consistent with the test's data quality objectives (see Appendix E E1)
B. Wavenumber reproducibility ceck. Record a preliminary workspace air sample spectrum and perform the calculations described in Appendix B, section B4
SAMPLING:
9. Using the integration time specified in the test plan, obtain samples and record infrared spectra of the desired workplace gases using the entire sampling system. The sampling location may be changed as desired. For tests of duration greater than 2 h, or if the FTR system is moved during sampling, monitor the system's single-beam response level. If changes greater than 5% in non-absorbing regions of the single-beam spectrum occur, suspend sampling and record a new background spectrum (see step 5), Sample spectra must be acquired at each sampling location for a a time period no less than the system response time (see the system test documentation)
10. Repeat step 6; acquire at least one posttest sz spectrum of nitrogen or zero air; confirm the absence of sampling system contaminates
11. Record at least one posttest CTS spectrum (see step 7) confirm that the system configuration and the system absorption path length (to within 5%) match those of the test plan
12. (Optional) Acquire a posttest background spectrum (see step 5)
A. LOD check. Using one of the sz spectra, calculate the RSA values (see APPENDIX B section B2) and LOD value (see Appendix E,section E1) in the analytical regions pertaining to the test analytes. verify that the system path length (see APPENDIX B, section B1), current RSA values, and current LODs are consistent with the test's data quality objectives (see Appendix E E1) B. Wavenumber reproducibility ceck. Record a preliminary workspace air sample spectrum and perform the calculations described in Appendix B, section B4 SAMPLING: 9. Using the integration time specified in the test plan, obtain samples and record infrared spectra of the desired workplace gases using the entire sampling system. The sampling location may be changed as desired. For tests of duration greater than 2 h, or if the FTR system is moved during sampling, monitor the system's single-beam response level. If changes greater than 5% in non-absorbing regions of the single-beam spectrum occur, suspend sampling and record a new background spectrum (see step 5), Sample spectra must be acquired at each sampling location for a a time period no less than the system response time (see the system test documentation) 10. Repeat step 6; acquire at least one posttest sz spectrum of nitrogen or zero air; confirm the absence of sampling system contaminates 11. Record at least one posttest CTS spectrum (see step 7) confirm that the system configuration and the system absorption path length (to within 5%) match those of the test plan 12. (Optional) Acquire a posttest background spectrum (see step 5)
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