Effect of water (pH)‎ on the stability of pirimicarb

الملخص EN

The chemical stability of pirmicarb was studied at different values of the water pH.

Four different treatments were used to study the stability of pirimicarbs these were: King Abdallah Canal Water (KAC) (pH=8.26), distilled water, phosphoric acid - treat- ed canal water (pH=6.OO), and propionic acid - treated canal water (pH=6.00).

Samples were allowed to stand for three different periods (1 hrs) after spraying solution preparation.

Gas liquid chromatographic (GLC) method was used in the determination of pirmicarb in water samples.

Results indicated that KAC water treatment caused the highest percentage of hydrolysis of pirimicarb after l, 4, and 24 hrs from treatment, while Iosses were slightly lower in distilled water.

Phosphoric acid treated canal water showed almost negligible percentage of hydrolysis at 24 hrs period, While propionic acid - treated water was Iess efficient compared to phosphoric acid treatment.