2.3. Quality assurance/quality control (QA/QC)
Five quality assurance and quality control (QA/QC) samples were
included for analysis. They included a 1L ultrapure water blank, a
laboratory control sample (LCS) using ultrapure water spiked with
300 ng L1 of analytes and three matrix spike (MS) samples (Site A,
Site B and Site D Tank) each spiked with 300 ng L1 of analytes.
Recoveries are reported with the results (Table 4).