Evaluation of extraction techniques for butyltin compounds in sediment

Zhang, Shuzhen; Chau, Y. K.; Li, W C; Chau, Alfred S Y

doi:10.1002/aoc.590050510

Cited by 53 publications

(14 citation statements)

References 15 publications

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“…There is a plethora of references in the literature suggesting the use of various solvents mixed with hydrochloric acid (concentration varying from 2 to 10 M) and complexing agents for the extraction of organotin compounds from solid samples such as sediment, soil or sludge [40][41][42]. We have shown that in the ES MS of all organotin compounds, treatment with either a high or low concentration of hydrochloric acid results in a loss of all butyl or phenyl groups.…”

Section: Resultsmentioning

confidence: 95%

Electrospray tandem mass spectrometric measurements of organotin compounds

Banoub

Miller-Banoub

Sheppard

et al. 2004

Journal of Spectroscopy

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Electrospray mass spectrometry of a series of organotin compounds in solutions of methanol are reported. Low energy collision‒induced dissociation MS/MS analysis of diagnostic precursor ions confirmed the characteristic fingerprint patterns obtained in the conventional electrospray spectra and proved to be a specific and very sensitive method for quantification of the (R3Sn)2O and the series of RnSnX4–ncompounds in environmental matrices. Concentrations of butyltin compounds (TBTX, DBTX2and MBTX3) in sediment reference materials PACS-1 and PACS-2 and butyltin and phenyltin compounds (TBTX, DBTX2, MBTX3, TPTX, DPTX2and DPTX3) in Quasimeme II biota reference material (QSP001BT) were determined. The organotin compounds were extracted from the reference materials with 1-butanol followed by dilution with methanol containing 1 mM ammonium acetate. The extracts were introduced directly into the electrospray source by a continuous flow of MeOH : H2O (60 :40). Quantitation of TBTX, DBTX2, TPTX, DPTX2and DPTX3was achieved by low energy CID tandem mass spectrometry using the Multiple Reaction Monitoring (MRM) analysis with the appropriate MS/MS transitions (positive ion electrospray ionization). Quantitation of MBTX3was achieved using a negative ion electrospray CID tandem mass spectrometry method. For all samples quantitation was achieved by use of the method of standard addition, relative extraction recoveries were determined spiking with internal standards of mono‒, di‒ and triorganotin compounds separately to different samples.

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Section: Resultsmentioning

confidence: 95%

Electrospray tandem mass spectrometric measurements of organotin compounds

Banoub

Miller-Banoub

Sheppard

et al. 2004

Journal of Spectroscopy

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“…Many extraction techniques have been developed for determination of organotin compounds in solid environ- mental samples [32,33]. Some involve acid leaching by mechanical and/or manual shaking with a polar medium, usually containing a chelating agent to improve the efficiency of extraction of MBT [34].…”

Section: Evaluation Of Degradation Reactions During Solid-liquid Extrmentioning

confidence: 99%

Determination of butyltin compounds in environmental samples by isotope-dilution GC–ICP–MS

Alonso¹,

Encinar²,

González³

et al. 2002

Anal Bioanal Chem

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Isotope-dilution analysis in combination with GC-ICP-MS detection has been applied to the determination of butyltin species in environmental samples. Different spikes containing the isotopically labeled butyltin species have been synthesized in the laboratory after optimization of the reaction conditions. The isotopic compositions of the tin species in the different spike solutions were determined by GC-ICP-MS after derivatization by aqueous ethylation with sodium tetraethylborate. Reverse isotope-dilution analysis was used for quantitation of the spike solutions by means of natural MBT, DBT, and TBT standards. The mixed spikes were used for simultaneous analysis of MBT, DBT and TBT in the certified reference materials, PACS-2, CRM 462, and CRM 646, with satisfactory results. The excellent agreement of the different speciation results obtained by use of the different spikes is a good indicator of the precision, accuracy, and reliability which can be achieved by using isotope-dilution analysis for trace metal speciation. Application of a double spike containing (119)Sn-enriched MBT (79.7 At%), (118)Sn-enriched DBT (86.7 At%), and (119)Sn-enriched TBT (83.1 At%) also enabled evaluation of the conditions resulting in quantitative extraction of the species from the solid matrix, in combination with possible alterations depending on the different extraction procedures used (mechanical shaking, ultrasounds, and microwaves). Mathematical equations used for this purpose computed the correct species concentrations directly and, additionally, the decomposition factors (from TBT to DBT and from DBT to MBT) after precise measurement of the (119)Sn/(120)Sn and (118)Sn/(120)Sn ratios for all butyltin species by GC-ICP-MS.

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“…to compare extraction procedures for TBT determination in sediment. 6 More recently, certification campaigns were performed which allowed groups of labora-PH. QUEVAUVILLER E T A L .…”

Section: Introductionmentioning

confidence: 99%

Interlaboratory study for the improvement of tributyltin determination in harbour sediment (rm 424)

Quevauviller

Astruc

Ebdon

et al. 1994

Applied Organom Chemis

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Following two interlaboratory studies on tributyltin species (TBT) in water and TBT‐spiked sediment, the EC Community Bureau of Reference (BCR) (Measurements and Testing Programme) organized in 1992 an interlaboratory study on TBT in a harbour sediment (RM 424) to investigate sources of error possibly occurring in the analysis of a complicated matrix and to attempt to certify this material. The sediment was collected in the Sado Estuary (P), then carefully prepared, and its homogeneity and stability were verified. The low TBT content encountered in this material, and the high level of interferences, created difficulties with the techniques using hydride generation, whereas better agreement was obtained for other derivatization techniques with GC/FPD and GC/MS. This paper presents the results of the interlaboratory study. The reference value for TBT in this material is 20±5 ng g−1 (as TBT cation) and the indicative values for dibutyltin (DBT) and monobutyltin (MBT) are 53±19 ng g−1 (as DBT cation) and 257±54 ng g−1 (as MBT cation), respectively. Owing to the difficulties encountered, the reference material was not certified and is considered as a research material to be used for the evaluation of the performance of analytical techniques for the determination of low TBT levels in a difficult matrix.

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Evaluation of extraction techniques for butyltin compounds in sediment

Cited by 53 publications

References 15 publications

Electrospray tandem mass spectrometric measurements of organotin compounds

Electrospray tandem mass spectrometric measurements of organotin compounds

Determination of butyltin compounds in environmental samples by isotope-dilution GC–ICP–MS

Interlaboratory study for the improvement of tributyltin determination in harbour sediment (rm 424)

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