Solid-phase extraction-fluorimetric high performance liquid chromatographic determination of domoic acid in natural seawater mediated by an amorphous titania sorbent

Chan, Ivy O M; Tsang, Vic W.H.; Chu, K.K.; Leung, Shu-Wai; Lam, Michael Hon-Wah; Lau, Tai‐Chu; Lam, Patrick T.I.; Wu, Rudolf S.S.

doi:10.1016/j.aca.2006.09.063

Cited by 30 publications

(20 citation statements)

References 33 publications

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“…Selection of a SPATT resin-Other solid-phase extraction techniques exist for the extraction of DA from natural media such as seawater and urine (Chan et al 2007;Piletska et al 2008). These previously described methods require specialized adsorption media, sample pre-treatment (usually pH adjustment), or both, such that their application toward in-situ adsorption of DA is not feasible (and is not the purpose for which they were designed).…”

Section: ; Aoac International 2006)mentioning

confidence: 99%

Application of Solid Phase Adsorption Toxin Tracking (SPATT) for field detection of the hydrophilic phycotoxins domoic acid and saxitoxin in coastal California

Lane

Roddam

Langlois

et al. 2010

Limnology & Ocean Methods

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Recent publications have identified the analysis of phycotoxins in sentinel shellfish as a problematic tool for environmental monitoring purposes. Domoic acid (DA), a neurotoxin produced by some species of the diatom Pseudo‐nitzschia, can remain undetected in sentinel shellfish stocks during toxic blooms and subsequent marine bird and mammal mass mortality events. Solid Phase Adsorption Toxin Tracking (SPATT) has previously been described for monitoring of lipophilic toxins, whereas resin‐based sampling methods are routinely employed for many other environmental contaminants. Here, we evaluate the applicability of SPATT for monitoring the hydrophilic phycotoxin DA and demonstrate that the same field sampling methods can be used for the detection of saxitoxins. We present laboratory‐based adsorption profiles characterizing the performance of SPATT with four resin types: (1) HP20, (2) SP700, (3) SP207, and (4) SP207SS. We present results from 17 mo of approximately weekly SPATT deployments in Monterey Bay, California (USA); this period included two significant toxigenic Pseudo‐nitzschia bloom events as well as low‐level saxitoxin events. SPATT signaled the presence of DA 3 and 7 weeks before the recognition of bloom conditions by traditional monitoring techniques (7 and 8 weeks before shellfish toxicity). Under ambient (non‐bloom) conditions, all resins detected DA when its presence was not apparent from traditional monitoring, highlighting the ubiquity of low level or transient toxin events in the environment. This study is the first to evaluate SPATT deployments in U.S. waters, and the first to demonstrate the applicability of SPATT toward detection of hydrophilic phycotoxins in the field.

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Section: ; Aoac International 2006)mentioning

confidence: 99%

Application of Solid Phase Adsorption Toxin Tracking (SPATT) for field detection of the hydrophilic phycotoxins domoic acid and saxitoxin in coastal California

Lane

Roddam

Langlois

et al. 2010

Limnology & Ocean Methods

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“…The often-used adsorbents were C18 [12,13], Lichrolut EN [14], expanded graphite [15],] and so on. In recent years, multiwalled carbon nanotubes [16,17] [18][19][20][21][22][23][24][25]. However, almost no reports have been found on other pollutants except these reports based on such enrichment method.…”

Section: Introductionmentioning

confidence: 99%

Determination of trace organophosphorus pesticides in water samples with TiO₂ nanotubes cartridge prior to GC‐flame photometric detection

Huang

Zhou

Xiao

et al. 2010

J of Separation Science

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This article described a new method for the sensitive determination of organophosphorus pesticides in water samples using SPE in combination with GC-flame photometric detection. In the procedure of method development, TiO(2) nanotubes were used as SPE adsorbents for the enrichment of organophosphorus pesticides from water samples. Several factors, such as eluent and its volume, sample pH, sample volume, sample flow rate, and concentration of humic acid, were optimized. Under the optimal conditions, the proposed method had good linear ranges as 0.1-40 microg/L for each of them, LOD of 0.11, 0.014, and 0.0025 microg/L, and LOQs of 0.37, 0.047, and 0.0083 microg/L for chlorpyrifos, phorate, and methyl parathion, respectively. The proposed method was validated with real environmental water samples and the spiked recoveries were over the range of 86.5-115.1%. All these results indicated that TiO(2) nanotubes, as a new SPE adsorbent, would be used widespread for the preconcentration and determination of environmental pollutants in the future.

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“…One of current trends in the development of optoelectronic devices for the needs of modern analytical chemistry is paired emitter detector diodes (PEDDs). According to the PEDD operation principle [ 1 , 2 ], a complete optical detector consists of light-emitting diodes (LEDs) only. The simplest PEDD consists of two LEDs.…”

Section: Introductionmentioning

confidence: 99%

Towards optoelectronic urea biosensors

2015

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Integration of immobilized enzymes with light-emitting diodes (LEDs) leads to the development of optoelectronic enzyme-based biosensors. In this work, urease, used as a model enzyme, immobilized in the form of an open-tubular microbioreactor or biosensing membrane that has been integrated with two red LEDs. It forms complete, fiberless, miniaturized, and extremely economic biooptoelectronic devices useful for nonstationary measurements under flow analysis conditions. Both enzyme-based biodevices, operating according to the paired emitter detector diode (PEDD) principle, allow relatively fast, highly sensitive, and well-reproducible urea detection in the millimolar range of concentrations. Potential analytical applications of the developed urea bioPEDDs have been announced. Both presented constructions will be easily adapted for the development of other optoelectronic biosensors exploring various enzyme-based schemes of biodetection.Electronic supplementary materialThe online version of this article (doi:10.1007/s00216-014-8434-z) contains supplementary material, which is available to authorized users.

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Solid-phase extraction-fluorimetric high performance liquid chromatographic determination of domoic acid in natural seawater mediated by an amorphous titania sorbent

Cited by 30 publications

References 33 publications

Application of Solid Phase Adsorption Toxin Tracking (SPATT) for field detection of the hydrophilic phycotoxins domoic acid and saxitoxin in coastal California

Application of Solid Phase Adsorption Toxin Tracking (SPATT) for field detection of the hydrophilic phycotoxins domoic acid and saxitoxin in coastal California

Determination of trace organophosphorus pesticides in water samples with TiO₂ nanotubes cartridge prior to GC‐flame photometric detection

Towards optoelectronic urea biosensors

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Solid-phase extraction-fluorimetric high performance liquid chromatographic determination of domoic acid in natural seawater mediated by an amorphous titania sorbent

Cited by 30 publications

References 33 publications

Application of Solid Phase Adsorption Toxin Tracking (SPATT) for field detection of the hydrophilic phycotoxins domoic acid and saxitoxin in coastal California

Application of Solid Phase Adsorption Toxin Tracking (SPATT) for field detection of the hydrophilic phycotoxins domoic acid and saxitoxin in coastal California

Determination of trace organophosphorus pesticides in water samples with TiO2 nanotubes cartridge prior to GC‐flame photometric detection

Towards optoelectronic urea biosensors

Contact Info

Product

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About

Determination of trace organophosphorus pesticides in water samples with TiO₂ nanotubes cartridge prior to GC‐flame photometric detection