International Scholarly Research Notices

Research Article

Thermodynamic and Extrathermodynamic Studies of Enantioseparation of Imidazolinone Herbicides on Chiralcel OJ Column

Table 1

Thermodynamic parameters of the imidazolinone herbicides.


Compound	Mobile phase
Compound	Mobile phase	kJ mol⁻¹	kJ mol⁻¹	J mol⁻¹ K⁻¹	J mol⁻¹ K⁻¹	kJ mol⁻¹	kJ mol⁻¹

Imazapyr	85/15
	80/20
	75/25
	70/30
	60/40

Imazapic	85/15
	80/20
	75/25
	70/30
	60/40

Imazethapyr	85/15
	80/20
	75/25
	70/30
	60/40

Imazamox	85/15
	80/20
	75/25
	70/30
	60/40

Imazaquin	85/15
	80/20
	75/25
	70/30
	60/40

Subscripts and denote the (−) and (+) enantiomers. Chromatographic conditions: Chiralcel OJ column; flow rate, 1 mL/min; detection wavelength, 254 nm; mobile phase, n-hexane (0.1%TFA)-2-propanol (v/v); column temperature, 15–50°C.