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. 2021 Jul 7;795:148834. doi: 10.1016/j.scitotenv.2021.148834

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Fig. 6 — Comparison of the direct capture method with PEG/NaCl precipitation. Wastewater samples were processed using the two methods as described in the Methods section. (A) Concentration of SARS-CoV-2 RNA extracted is represented as GU/L in the wastewater sample, (B) Percentage recovery for extraction of MS2 phage (viral spike control). Results shown are means ± SD (n= 3).