SDS Volume
Volume 78. Acetonitrile Binary Systems, p 1006
Source Publication
Szydlowski, J.; Szykula, M.; Fluid Phase Equilib. 154, 79 (1999).
Conditions:
Room Temp: 256 - 273 $\pu{K}$
Compiler:
Methodology:
The synthetic method was used with a simplified version of the apparatus described in work [1]. Temperature was changed at the rate < 0.01 K/min; there was no visible influence of the rate on the transition temperature up to the rate 0.1 K/min. Due to the very weak turbidity a long capillary cell was employed. A 5-mW Polythec HeNe laser was used as a probe for detecting the phase separation.
Sample Information:
- Sigma; 99.5% D; carefully dried over 5 Å molecular sieves; not purified.
- Millipore Mili-Q; quality.
Measurement Errors:
Ambient temperature: ±5 mK
Methodology Citation
1 Szydlowski, J.; Rebelo, L. P.; Van Hook, W. A.; Rev. Sci. Instrum. 63, 1717 (1992).
System Components:
- Acetonitrile-d3, $\ce{ C2D3N }$; [2206-26-0] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
UCST was reported at 272.961 ± 0.005 K at x1c = 0.365 ± 0.002 (100 w1 = 58.4, compiler).
| $T$ (°C) | $T$ ($\pu{K}$) | $x_{1}$ | w1 |
|---|---|---|---|
| -16.861 | 256.289 | - | - |
| -12.653 | 260.497 | - | - |
| -8.217 | 264.933 | 0.174 | 34.0 |
| -7.653 | 265.497 | - | - |
| -5.062 | 268.088 | - | - |
| -4.660 | 268.490 | 0.203 | 38.4 |
| -2.825 | 270.325 | - | - |
| -1.475 | 271.675 | - | - |
| -1.428 | 271.722 | 0.253 | 45.3 |
| -0.552 | 272.598 | - | - |
| -0.410 | 272.740 | 0.300 | 51.2 |
| -0.189 | 272.961 | 0.362 | 58.1 |
| -16.861 | 256.289 | 0.742 | 87.5 |
| -12.653 | 260.497 | 0.701 | 85.1 |
| -8.217 | 264.933 | - | - |
| -7.653 | 265.497 | 0.642 | 81.4 |
| -5.062 | 268.088 | 0.600 | 78.6 |
| -4.660 | 268.490 | - | - |
| -2.825 | 270.325 | 0.550 | 74.9 |
| -1.475 | 271.675 | 0.500 | 71.0 |
| -1.428 | 271.722 | - | - |
| -0.552 | 272.598 | 0.451 | 66.8 |
| -0.410 | 272.740 | - | - |
| -0.189 | 272.961 | - | - |


