Table 7 Second viscosity B coefficient (Jones–Dole equation) value for GBP in 0.01, 0.03 and 0.05 molality (mol kg−1) concentration of aqueous betaine-based compounds solutions at 298 K.

From: Gabapentin drug interactions in water and aqueous solutions of green betaine based compounds through volumetric, viscometric and interfacial properties

msolvent

(mol kg−1)

B

(dm3/2 mol−1/2)

σ

(η)

Betaine

0.0099

0.850 ± 0.03

0.01

0.0298

0.842 ± 0.04

0.06

0.0496

0.843 ± 0.09

0.09

DES (betaine-urea 1:2)

0.0103

1.762 ± 0.13

0.06

0.0300

0.850 ± 0.09

0.07

0.0504

-0.275 ± 0.02

0.01

IL(betaine octyl ester chloride)

0.0093

2.009 ± 0.31

0.03

0.0306

-0.156 ± 0.06

0.04

0.0493

-2.704 ± 0.13

0.09

  1. aThe standard uncertainties for molality, temperature and pressure were u (m) = 0.001 mol kg−1, u (T) = 0.2 K, u (P) = 10.5 hPa, respectively with level of confidence 0.95. The standard combined uncertainty for viscosity was about, uc (η) = 0.02 mPa s−1 (level of confidence 0.68).
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