@article {Melchert:2009:0306-7319:969,
title = "Cloud point extraction and concentration of carbaryl from natural waters",
journal = "International Journal of Environmental and Analytical Chemistry",
parent_itemid = "infobike://tandf/geac",
publishercode ="tandf",
year = "2009",
volume = "89",
number = "13",
publication date ="2009-01-01T00:00:00",
pages = "969-979",
itemtype = "ARTICLE",
issn = "0306-7319",
eissn = "1369-1619",
url = "https://www.ingentaconnect.com/content/tandf/geac/2009/00000089/00000013/art00003",
doi = "doi:10.1080/03067310902719134",
keyword = "pesticide analysis, cloud point, carbaryl, waters, spectrophotometry, Triton X-114",
author = "Melchert, Wanessa and Rocha, Fabio",
abstract = "An improved procedure is proposed for determination of the pesticide carbaryl in natural waters based on double cloud point extraction. The clean up step was carried out only with Triton X-114 in alkaline medium in order to avoid the use of toxic organic solvents as well as to minimise
waste generation. Cloud point preconcentration of the product of the reaction of the analyte with p-aminophenol and cetyltrimethylammonium bromide was explored to increase sensitivity and improve the detection limit. Linear response was achieved within 10 and 500 \textmug L-1 and the apparent
molar absorptivity was estimated as 4.6 \texttimes 105 L mol-1 cm-1. The detection limit was estimated as 7 \textmug L-1 at the 99.7% confidence level and the coefficient of variation was 3.4% (n = 8). Recoveries within 91 and 99% were estimated for carbaryl spiked water samples. The results
obtained for natural water samples were in agreement with those achieved by the batch of spectrophotometric procedure at the 95% confidence level. The proposed procedure is then a simple, fast, inexpensive and greener alternative for carbaryl determination.",
}