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. 2021 Oct 30;10:e00244. doi: 10.1016/j.ohx.2021.e00244

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© 2021 The Authors. Published by Elsevier Ltd.

This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

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Fig. 7 — Calibration of alcohol sensors setup at different locations in the laboratory. (a) In the solvent storage cabinet, calibration equation: Voltage = (0.29 ± 0.02) × Ethanol concentration + (1.18 ± 0.01), R² = 0.96; (b) above the sink, calibration equation: Voltage = (0.24 ± 0.01) × Ethanol concentration + (1.16 ± 0.01), R² = 0.97; (c) in the fume hood, calibration equation: Voltage = (0.21 ± 0.01) × Ethanol concentration + (1.51 ± 0.01), R² = 0.92; (d) above the working bench, calibration equation: Voltage = (0.59 ± 0.03) × Ethanol concentration + (1.54 ± 0.02), R² = 0.96. In all cases, n = 3.