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. 2019 Jan 22;24(3):403. doi: 10.3390/molecules24030403

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Effects of (a) amount of t-butanol (mL) on EY of IOPS using a solid-liquid ratio 1:12, a mass fraction of (NH₄)₂SO₄ 30% (w/v), a time of 30 min, and a temperature of 30 °C at pH 8.0; (b) mass fraction of (NH₄)₂SO₄ (%, w/v) on the EY of IOPS using a solid-liquid ratio of 1:12, t-butanol (10 mL), an extraction time of 30 min, and a temperature of 30 °C at pH 8.0; (c) temperature on the EY of IOPS using a solid-liquid ratio of 1:12, t-butanol (10 mL), a mass fraction of (NH₄)₂SO₄ 30% (w/v)_, and an extraction time of 30 min at pH 8.0; (d) pH on the yield of IOPS using a solid-liquid ratio of 1:12, t-butanol (10 mL), a mass fraction of (NH₄)₂SO₄ of 30% (w/v), an extraction time of 30 min, and a temperature of 30 °C; (e) extraction time on the yield of IOPS using a solid-liquid ratio of 1:12, t-butanol (10 mL), a mass fraction of (NH₄)₂SO₄ of 30% (w/v), and a temperature of 30 °C at pH 8.0.

Effects of (a) amount of t-butanol (mL) on EY of IOPS using a solid-liquid ratio 1:12, a mass fraction of (NH₄)₂SO₄ 30% (w/v), a time of 30 min, and a temperature of 30 °C at pH 8.0; (b) mass fraction of (NH₄)₂SO₄ (%, w/v) on the EY of IOPS using a solid-liquid ratio of 1:12, t-butanol (10 mL), an extraction time of 30 min, and a temperature of 30 °C at pH 8.0; (c) temperature on the EY of IOPS using a solid-liquid ratio of 1:12, t-butanol (10 mL), a mass fraction of (NH₄)₂SO₄ 30% (w/v)_, and an extraction time of 30 min at pH 8.0; (d) pH on the yield of IOPS using a solid-liquid ratio of 1:12, t-butanol (10 mL), a mass fraction of (NH₄)₂SO₄ of 30% (w/v), an extraction time of 30 min, and a temperature of 30 °C; (e) extraction time on the yield of IOPS using a solid-liquid ratio of 1:12, t-butanol (10 mL), a mass fraction of (NH₄)₂SO₄ of 30% (w/v), and a temperature of 30 °C at pH 8.0.