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rdf:type |
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lifeskim:mentions |
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pubmed:issue |
3
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pubmed:dateCreated |
2005-7-8
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pubmed:abstractText |
Anaerobic water samples containing levels of soluble Fe(II) may form insoluble Fe(III) particulates that could hinder subsequent extraction and analysis. Solid-phase extraction (SPE) cartridges could become blocked by this material, reducing the volume that can be processed. The ability of ascorbic acid to reduce these Fe(III) colloids and/or to prevent further oxidation of Fe(II) by dissolved oxygen during sampling was investigated and compared to sample stabilization with hydrochloric acid. Ascorbic acid (5%, w/v) proved the most effective treatment because it prevented 95% of the dissolved iron in the sample from precipitating during processing, compared to 40% in untreated samples. The effect of ascorbic acid addition on degradation of 2 rice pesticides, fipronil and thiobencarb, was investigated and compared to degradation rates in water. Pesticide reduction by ascorbic acid over a 3 h period was insignificant compared to the natural degradation occurring in deionized water. While this method was shown to increase sample processing time, it also allowed the processing of large-volume anaerobic water samples (150 mL) that were previously not extractable due to rapid obstruction of the SPE cartridge.
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pubmed:language |
eng
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pubmed:journal |
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pubmed:citationSubset |
IM
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pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/Ascorbic Acid,
http://linkedlifedata.com/resource/pubmed/chemical/Colloids,
http://linkedlifedata.com/resource/pubmed/chemical/Herbicides,
http://linkedlifedata.com/resource/pubmed/chemical/Hydrochloric Acid,
http://linkedlifedata.com/resource/pubmed/chemical/Insecticides,
http://linkedlifedata.com/resource/pubmed/chemical/Iron,
http://linkedlifedata.com/resource/pubmed/chemical/Oxygen,
http://linkedlifedata.com/resource/pubmed/chemical/Pesticide Residues,
http://linkedlifedata.com/resource/pubmed/chemical/Pesticides,
http://linkedlifedata.com/resource/pubmed/chemical/Pyrazoles,
http://linkedlifedata.com/resource/pubmed/chemical/Thiocarbamates,
http://linkedlifedata.com/resource/pubmed/chemical/Water,
http://linkedlifedata.com/resource/pubmed/chemical/Water Pollutants, Chemical,
http://linkedlifedata.com/resource/pubmed/chemical/benthiocarb,
http://linkedlifedata.com/resource/pubmed/chemical/fipronil
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pubmed:status |
MEDLINE
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pubmed:issn |
1060-3271
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pubmed:author |
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pubmed:issnType |
Print
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pubmed:volume |
88
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
854-9
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pubmed:dateRevised |
2008-3-17
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pubmed:meshHeading |
pubmed-meshheading:16001862-Ascorbic Acid,
pubmed-meshheading:16001862-Chromatography, Gas,
pubmed-meshheading:16001862-Colloids,
pubmed-meshheading:16001862-Dose-Response Relationship, Drug,
pubmed-meshheading:16001862-Herbicides,
pubmed-meshheading:16001862-Hydrochloric Acid,
pubmed-meshheading:16001862-Insecticides,
pubmed-meshheading:16001862-Iron,
pubmed-meshheading:16001862-Oxygen,
pubmed-meshheading:16001862-Pesticide Residues,
pubmed-meshheading:16001862-Pesticides,
pubmed-meshheading:16001862-Pyrazoles,
pubmed-meshheading:16001862-Thiocarbamates,
pubmed-meshheading:16001862-Time Factors,
pubmed-meshheading:16001862-Water,
pubmed-meshheading:16001862-Water Pollutants, Chemical
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pubmed:articleTitle |
Extraction of fipronil and thiobencarb from anaerobic water samples using solid-phase extraction.
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pubmed:affiliation |
CRC for Sustainable Rice Production, Farrer Centre, School of Agriculture, Charles Sturt University, Wagga Wagga 2678, NSW, Australia.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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