Method for the accurate determination of specific rotation. Specific rotation of valine and leucine
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The optical rotation of various concentrations of L-valine and L-leucine, dissolved in glacial acetic acid, or 5 or 6 M HCl, was measured with a photoelectric polarimeter at the nominal wavelengths 589, 578, 546, 436, and 365 nm and temperatures of 20, 25, and 30 °C. The specific rotation for any one wavelength, solute, and solvent could be defined by the equation [α]λT = A(1 + D(T − 25)) + BC, where T is temperature in °C, C is concentration in grams of solute per 100 ml of solution, and A, B, and D are constants. The best fit values of the constants were determined by computer calculation and are listed. Constants are also given for calculating a specific rotation based on grams of solute per 100 g of solution.
1956 ◽
Vol 78
(1)
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pp. 1-9
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1956 ◽
Vol 78
(1)
◽
pp. 10-15
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1978 ◽
Vol 56
(12)
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pp. 1149-1153
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