Abstract
The solubility (m S) of l-methionine in water was measured at 298.2 K and pressures up to 200 MPa. The data were fitted to the equation ln(m S/mol·kg−1) = −4.62 × 10−6 (p/MPa)2 + 2.65 × 10−3 (p/MPa) − 0.970 with a standard deviation of σ(ln m S) = 0.002. The pressure coefficient of the logarithm of solubility (∂ln m S/∂p) T was thermodynamically estimated to be (2.62 ± 0.34) × 10−3 MPa−1 at 0.10 MPa using several parameters such as partial molar volume and activity coefficient of l-methionine in water and molar volume of solid l-methionine. The resulting value agrees well with the second term on the right-hand side of the fitted equation above, indicating the reliability of the high-pressure solubility measurements. The value of (∂ln m S/∂p) T also was compared with those of other amino acids.
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Sawamura, S., Kunimasa, N. High-Pressure Solubility of l-Methionine in Water. J Solution Chem 43, 1810–1815 (2014). https://doi.org/10.1007/s10953-014-0242-8
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DOI: https://doi.org/10.1007/s10953-014-0242-8