MULTI - RESIDUE METHOD FOR PESTICIDE RESIDUE ANALYSIS OF OKRA CROP, ABELMOSCHUS ESCULENTUS (L.) IN MEERUT REGION

Okra fruits samples with insecticides were extracted with acetone and partitioned into DCM solvent. It was then cleaned up separately using two adsorbent namely neutral alumina and florisil were experimented for clean - up during recovery methods. The adsorbent Florisil in method IV was found to be the best adsorbent to afford highest recovery (over 80 - 91% ) with hexane: acetone (1:1v/v) as solvent system. In method I the recovery per cent was in the range of 65 - 74%. In methods II and III it was in the range of 62 - 82% and 72 - 82% respectively. The detection limit for organophosphates, synthetic pyrethroid, o rganochlorines and new molecules were 0.1 - 0.01, 0.01, 0.01 and 0.05ppm, respectively.