S. Valsecchi et al., Recovery of 4-nonylphenol and 4-nonylphenol ethoxylates from river sediments by pressurised liquid extraction, J CHROMAT A, 925(1-2), 2001, pp. 297-301
The pressurised liquid extraction (PLE) of 4-nonylphenol (4-NP) with methan
ol (100 degreesC and 100 atm) from river sediments was compared with methan
olic Soxhlet extraction, the standard method for the sediment analysis. The
PLE method showed a precision (average RSD ranged from 6 to 33%) and an ac
curacy (average recovery 85 and 87% for 4-NP and 4-NPE, respectively) compa
rable to those of Soxhlet. The extraction was performed on river sediments
and no organic carbon content influence was found. The comparative study pr
esented in this paper demonstrates that PLE is an alternative suitable extr
action method for 4-nonylphenol and 4-nonylphenol ethoxylate determination
in sediments. (C) 2001 Elsevier Science B.V. All rights reserved.