Cloud-point extraction of nodularin-R from natural waters

HongXia Yu; Ben Kwok-Wai Man; Lily Lee-Ni Chan; Michael Hon-Wah Lam; Paul K.S. Lam; Liansheng Wang; Hongjun Jin; Rudolf S.S. Wu

doi:10.1016/j.aca.2003.12.019

Cloud-point extraction of nodularin-R from natural waters

HongXia Yu
, Ben Kwok-Wai Man
, Lily Lee-Ni Chan
, Michael Hon-Wah Lam
, Paul K.S. Lam
, Liansheng Wang
, Hongjun Jin
, Rudolf S.S. Wu

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

33 Citations (Scopus)

Abstract

A cloud-point extraction (CPE) technique for the determination of a cyanobacterial hepatotoxin, nodularin-R, in aqueous media using a cationic surfactant, tricaprylmethylammonium chloride (Aliquat-336), was developed. Cloud-point phase separation of Aliquat-336 at ambient temperature was induced by the addition of sodium sulfate. The Aliquat-336/Na₂SO₄ CPE system displayed large preconcentration factor, F_C, for nodularin-R. At the operational CPE conditions, F_C of 709.2 was achieved. Distribution constant, K_D, of the distribution of nodularin-R between the surfactant-rich and aqueous phases of the CPE system was estimated to be (4.94±0.8)×10³. Coupled to liquid chromatography with UV detection, the CPE method offered a detection limit of 330pgml^-1 (in freshwater)/1.3ngml^-1 (in seawater) and a repeatability of 6.4% (in freshwater) (n=7, P

Original language	English
Pages (from-to)	63-70
Journal	Analytica Chimica Acta
Volume	509
Issue number	1
DOIs	https://doi.org/10.1016/j.aca.2003.12.019
Publication status	Published - 29 Apr 2004

Research Keywords

Cloud-point extraction
Cyanobacterial toxin
Natural waters
Nodularin-R

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10.1016/j.aca.2003.12.019

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title = "Cloud-point extraction of nodularin-R from natural waters",

abstract = "A cloud-point extraction (CPE) technique for the determination of a cyanobacterial hepatotoxin, nodularin-R, in aqueous media using a cationic surfactant, tricaprylmethylammonium chloride (Aliquat-336), was developed. Cloud-point phase separation of Aliquat-336 at ambient temperature was induced by the addition of sodium sulfate. The Aliquat-336/Na2SO4 CPE system displayed large preconcentration factor, FC, for nodularin-R. At the operational CPE conditions, FC of 709.2 was achieved. Distribution constant, KD, of the distribution of nodularin-R between the surfactant-rich and aqueous phases of the CPE system was estimated to be (4.94±0.8)×103. Coupled to liquid chromatography with UV detection, the CPE method offered a detection limit of 330pgml-1 (in freshwater)/1.3ngml-1 (in seawater) and a repeatability of 6.4\% (in freshwater) (n=7, P",

keywords = "Cloud-point extraction, Cyanobacterial toxin, Natural waters, Nodularin-R",

author = "HongXia Yu and Man, \{Ben Kwok-Wai\} and Chan, \{Lily Lee-Ni\} and Lam, \{Michael Hon-Wah\} and Lam, \{Paul K.S.\} and Liansheng Wang and Hongjun Jin and Wu, \{Rudolf S.S.\}",

year = "2004",

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doi = "10.1016/j.aca.2003.12.019",

language = "English",

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TY - JOUR

T1 - Cloud-point extraction of nodularin-R from natural waters

AU - Yu, HongXia

AU - Man, Ben Kwok-Wai

AU - Chan, Lily Lee-Ni

AU - Lam, Michael Hon-Wah

AU - Lam, Paul K.S.

AU - Wang, Liansheng

AU - Jin, Hongjun

AU - Wu, Rudolf S.S.

PY - 2004/4/29

Y1 - 2004/4/29

N2 - A cloud-point extraction (CPE) technique for the determination of a cyanobacterial hepatotoxin, nodularin-R, in aqueous media using a cationic surfactant, tricaprylmethylammonium chloride (Aliquat-336), was developed. Cloud-point phase separation of Aliquat-336 at ambient temperature was induced by the addition of sodium sulfate. The Aliquat-336/Na2SO4 CPE system displayed large preconcentration factor, FC, for nodularin-R. At the operational CPE conditions, FC of 709.2 was achieved. Distribution constant, KD, of the distribution of nodularin-R between the surfactant-rich and aqueous phases of the CPE system was estimated to be (4.94±0.8)×103. Coupled to liquid chromatography with UV detection, the CPE method offered a detection limit of 330pgml-1 (in freshwater)/1.3ngml-1 (in seawater) and a repeatability of 6.4% (in freshwater) (n=7, P

AB - A cloud-point extraction (CPE) technique for the determination of a cyanobacterial hepatotoxin, nodularin-R, in aqueous media using a cationic surfactant, tricaprylmethylammonium chloride (Aliquat-336), was developed. Cloud-point phase separation of Aliquat-336 at ambient temperature was induced by the addition of sodium sulfate. The Aliquat-336/Na2SO4 CPE system displayed large preconcentration factor, FC, for nodularin-R. At the operational CPE conditions, FC of 709.2 was achieved. Distribution constant, KD, of the distribution of nodularin-R between the surfactant-rich and aqueous phases of the CPE system was estimated to be (4.94±0.8)×103. Coupled to liquid chromatography with UV detection, the CPE method offered a detection limit of 330pgml-1 (in freshwater)/1.3ngml-1 (in seawater) and a repeatability of 6.4% (in freshwater) (n=7, P

KW - Cloud-point extraction

KW - Cyanobacterial toxin

KW - Natural waters

KW - Nodularin-R

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DO - 10.1016/j.aca.2003.12.019

M3 - RGC 21 - Publication in refereed journal

SN - 0003-2670

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EP - 70

JO - Analytica Chimica Acta

JF - Analytica Chimica Acta

IS - 1

ER -

Cloud-point extraction of nodularin-R from natural waters

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