On-line supercritical fluid extraction and chromatography of organotins with packed microbore columns and formic acid modified carbon dioxide

Oudsema, John W.; Poole, Colin F.

doi:10.1007/bf00323738

Cited by 45 publications

(5 citation statements)

References 72 publications

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“…However, ICP-MS detection resulted in a 1 order of magnitude reduction in detection limits (hundreds of femtograms) compared to flame ionization detection. Oudsema and Poole used packed-microbore columns, formic acid-modified CO2 as mobile phase, and the FID for the determination of organotin compounds (310). Detection limits for most species were in the hundreds of picograms.…”

Section: Dachs and Bayona Optimized Flame Photometric Detectionmentioning

confidence: 99%

Supercritical Fluid Chromatography and Extraction

Chester¹,

Pinkston²,

Raynie³

1994

Anal. Chem.

163

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Section: Dachs and Bayona Optimized Flame Photometric Detectionmentioning

confidence: 99%

Supercritical Fluid Chromatography and Extraction

Chester¹,

Pinkston²,

Raynie³

1994

Anal. Chem.

163

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“…chlorides, acetates) when they are analyzed by SFC using CO 2 modified with formic acid. 11 Furthermore, acetic acid was also found effective for the extraction of triphenyl and tributyltin from biotic matrices 15 but it has not been evaluated in the case of sediments. Among the three carboxylic acids evaluated, acetic acid was the most efficient modifier for the extraction of di-and tributyltin compounds, and propionic acid for the monosubstituted OT compounds.…”

Section: Effect Of Acid Modi®ersmentioning

confidence: 99%

“…10 However, the former approach (complexing agent) appears to be particularly interesting, especially for mono-and di-substituted organotin compounds, because the use of complexing agents can improve the solubility of ionic organotin compounds in the supercritical fluid. The feasibility of acidic CO 2 modifiers 11,14 (formic and acetic acids) or polar fluids 12 (CHClF 2 ) for the extraction of OT compounds from sediment and biota has been assessed for a variety of environmental and food matrices, but these extraction procedures have not been validated.…”

Section: Introductionmentioning

confidence: 99%

Effects of complexing agents and acid modifiers on the supercritical fluid extraction of native phenyl- and butyl-tins from sediment

Cai

Ábalos

Bayona

1998

Appl. Organometal. Chem.

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The effects of: (1) the modifier type (methanol and formic, acetic and propionic acids), (2) complexing agents (diethylammonium diethyldithiocarbamate, ammonium pyrrolidinedithiocarbamate) either with or without acidic modifiers, (3) the extraction temperature (50–80 °C) and pressure (30–50 MPa), (4) the extraction procedure (static–dynamic or dynamic), and (5) the volume of static modifier, on the extraction efficiency of native butyl‐ and phenyl‐tin compounds from sediment, were evaluated comprehensively. The highest extraction efficiency for butyl‐ and phenyl‐tin compounds was obtained at 30 MPa and 50 °C by using CO2 modified with acetic acid (200 μl in the cell). Supercritical fluid extraction (SFE) extracts were hexylated and determined by GC–FPD using a 610 nm bandpass filter without any clean‐up step. In summary, the developed analytical procedure is robust (no restrictor clogging; free from FPD interferences), it is low‐cost (no complexing agents needed), it has a high sample throughput (<3 h), it is independent of the matrix for the determination of butyltin compounds in sediment, and it provides the highest precision among the SFE procedures reported for organotin determination. © 1998 John Wiley & Sons, Ltd.

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“…Pinkston et al [5] found that capillary SFC-MS is well suited to confirm the identity of the trimethylsilyl derivative of inositol triphosphate. Chester and Innis [4] analyzed silylated carbohydrates by SFC-FID, and Oudsema and Poole [14] used FID to detect maltodextrin derivatized with trifluoroacetic anhydride. SFC coupled with ELSD has also been studied [12,15] as mentioned above.…”

Section: Introductionmentioning

confidence: 99%