Photostabilization of Phenoxyacetic Acid Herbicides MCPA and Mecoprop by Hydroxypropyl-β-cyclodextrin

Table 1

Complex formation parameters for MCPA/HP-β-CD and mecoprop/HP-β-CD systems in water at 25°C.

Herbicide	𝑆0 (mM)	α	𝐾𝑠 (M^−1)	𝑅^2
MCPA	2.22±0.04	0.45±0.03	334±9	0.9993
Mecoprop	3.12±0.03	0.47±0.05	282±5	0.9990

𝑆₀ represents the solubility of MCPA or mecoprop; α: slope; 𝐾_𝑠: stability constant.