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Table 4 The penalty points of the proposed spectrophotometric method according to the Analytical Eco-scale

From: Utility of sustainable ratio derivative spectrophotometry for the concurrent assay of synergistic repurposed drugs for COVID-19 infections; Insilico pharmacokinetics proof

Reagents/instruments

Penalty points (PPs)

Methanol

6

Energy of spectrophotometer

0

Occupational hazard

0

waste

5

PPs

11

Eco-scale score

89