Abstract
A selective pressurized liquid extraction (SPLE) procedure capable of performing simultaneous extraction and clean-up has been demonstrated
for multi-residue analysis of organochlorine pesticides (OCPs) in soil. The final method was performed at 100 ◦C for 3×10 min using acetone/nheptane
(1:1, v/v). Florisil was placed inside the extraction cell downstream the sample to remove interfering compounds. Extraction of two soil
samples by SPLE gave a recovery which was over 80% for -endosulfan, endosulfan sulfate, p,p-DDT and p,p-DDE compared to PLE with
off-line clean-up. The same trend was observed when applying the SPLE method to a certified reference soil sample (CRM 811-050) containing
13 OCPs, where the SPLE method gave 80–90% recovery vis-`a-vis the PLE method with off-line clean-up. Feasibility of the SPLE method was
further demonstrated by applying it to five real soil samples collected in Ethiopia.
© 2007 Published by Elsevier B.V.
AbstractA selective pressurized liquid extraction (SPLE) procedure capable of performing simultaneous extraction and clean-up has been demonstratedfor multi-residue analysis of organochlorine pesticides (OCPs) in soil. The final method was performed at 100 ◦C for 3×10 min using acetone/nheptane(1:1, v/v). Florisil was placed inside the extraction cell downstream the sample to remove interfering compounds. Extraction of two soilsamples by SPLE gave a recovery which was over 80% for -endosulfan, endosulfan sulfate, p,p-DDT and p,p-DDE compared to PLE withoff-line clean-up. The same trend was observed when applying the SPLE method to a certified reference soil sample (CRM 811-050) containing13 OCPs, where the SPLE method gave 80–90% recovery vis-`a-vis the PLE method with off-line clean-up. Feasibility of the SPLE method wasfurther demonstrated by applying it to five real soil samples collected in Ethiopia.© 2007 Published by Elsevier B.V.
การแปล กรุณารอสักครู่..
