Selection and cleaning of plastic containers for storage of trace element samples

Moody, John R.; Lindstrom, Richard M.

doi:10.1021/ac50022a039

Cited by 378 publications

(133 citation statements)

References 11 publications

Supporting

Mentioning

121

Contrasting

Unclassified

Order By: Relevance

“…Subsequently, the content ions was determined. All glass wares, plastic devices and Teflon devices were thoroughly acid washed (Moody and Lindstrom 1977).The labile fraction of the sediment was extracted with 1 M HCl. The samples were stored overnight to allow for the complete removal of generated CO 2 .…”

Section: Sample Mineralisationmentioning

confidence: 99%

The accumulation of metal (Co, Cr, Cu, Mn and Zn) in freshwater Ulva (Chlorophyta) and its habitat

2013

View full text Add to dashboard Cite

The possibility of using freshwater Ulva (Chlorophyta) as a bioaccumulator of metals (Co, Cr, Cu, Mn and Zn) in lake and river water was examined weekly in the summer of 2010 in three types of samples: the water, the sediment and the thalli of Ulva. Samples of freshwater Ulva were collected from two aqueous ecosystems lie 250 km away from the basin of the Baltic Sea and 53 km from each other. A flow lake located in the centre of the big city was the first water reservoir (ten sites) and second, the suburban river (six sites). The mean metal concentrations in the Ulva tissue from the river and the lake decreased in the following order:respectively. Moreover, a negative and statistically significant correlation between Mn concentrations in the Ulva thalli and the river water was observed. Additionally, numerous correlations were noted between the different concentrations of metals within the Ulva thalli, in the water and in the sediment. The great concentrations of Mn and Zn and the smallest of Co were found in thalli of Ulva, irrespective of the type of the ecosystem from which samples of algal thalli originated. Freshwater Ulva populations examined in this study were clearly characterized a dozen or so times by the higher Mn and Cr accumulation than taxa from that genera coming from sea ecosystems. The calculated bioconcentration factor confirm the high potential for freshwater Ulva to be a bioaccumulator of trace metals in freshwater ecosystems.

show abstract

Section: Sample Mineralisationmentioning

confidence: 99%

The accumulation of metal (Co, Cr, Cu, Mn and Zn) in freshwater Ulva (Chlorophyta) and its habitat

2013

View full text Add to dashboard Cite

show abstract

“…Most samples came from the Rio Negro or its tributaries, between Manaus and Santa Isabel do Rio Negro ( Figure 1); two samples (IN1 and IP1) were from igarapés, or small shallow rivers, and two samples (RS4 and RS5) were collected in the Solimões, near Manaus. Samples were manually collected beneath the surface in 1-Liter acid-washed 9 polyethylene flasks, rinsed with the water being collected. Field measurements of conductivity and pH followed established procedures 10 .…”

Section: Sampling and Pretreatmentmentioning

confidence: 99%

A contribution to the chemical characterization of rivers in the Rio Negro Basin, Brazil

Küchler¹,

Miekeley²,

Forsberg³

2000

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

Water samples were collected in Middle Amazonia from the Amazon River, Rio Negro and 17 tributaries of Rio Negro. The analyses consisted of pH, conductivity, and dissolved organic (DOC) measurements, as well as plasma source mass spectrometry (ICP-MS). Factor analysis revealed three factors, which explained 94% of the total variance. A plot of factor scores presented a cluster containing mostly samples from the Rio Negro Basin. Ultrafiltration tests confirmed that organics from the Rio Negro have higher molecular mass than in the Amazon, and that some metals are associated with these compounds. Heavy rare-earth elements (REE) are enriched relative to light REE in the dissolved fraction of most rivers of the Negro Basin; the opposite occurred in suspended matter.

show abstract

“…Elevated levels of Fe and Cr were also evident from previous work in which different fluoropolymers were analyzed following extraction with nitric acid. 30 These metals are frequent constituents of mechanical machines and reactors encountered during polymer synthesis and their elevated concentrations may reflect possible contamination from such surfaces. In the case of Ca (NAA data were not available), the relatively high concentration found could arise from the use of calcium salts as a nucleating agent for foaming and as an antiblocking additive.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Determination of Trace Elements in Fluoropolymers after Microwave-Induced Combustion

et al. 2012

View full text Add to dashboard Cite

Access and use of this website and the material on it are subject to the Terms and Conditions set forth at NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=21270354&lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=21270354&lang=fr READ THESE TERMS AND CONDITIONS CAREFULLY BEFORE USING THIS WEBSITE.http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Questions? Contact the NRC Publications Archive team atPublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://doi.org/10.1021/ac3029213Analytical Chemistry, 85, 1, pp. 374-380, 2012-11-21 ABSTRACT: An effective approach to the digestion of fluoropolymers for the determination of Ag, Ca, Cd, Co, Cr, Cu, Fe, K, Mg, Mn, and Ni impurities has been developed using microwave-induced combustion (MIC) in closed quartz vessels pressurized with oxygen. Samples that were examined included the following: polytetrafluorethylene (PTFE); polytetrafluoroethylene with an additional modifier, perfluoropropylvinylether (PTFE-TFM); and fluorinated ethylene propylene (FEP). A quartz device was used as a sample holder, and the influence of the absorber solution was evaluated. Determination of trace elements was performed by inductively coupled plasma−optical emission and mass spectrometry. Neutron activation analysis (NAA) was used for validation purposes. Results were also compared to those obtained using microwave-assisted acid extraction in high-pressure closed systems. Dilute nitric acid (5 mol L −1 ), which was selected as the absorbing medium, was used to reflux the sample for 5 min after the combustion. Using these conditions, agreement for all analytes was better than 98% when compared to values determined by NAA. The residual carbon content in the digests was lower than 1%, illustrating the high efficiency of the method. Up to 8 samples could be digested within 30 min using MIC, providing a suitable throughput, taking into account the inertness of such samples. Determination of Trace Elements in Fluoropolymers after

show abstract

Selection and cleaning of plastic containers for storage of trace element samples

Cited by 378 publications

References 11 publications

The accumulation of metal (Co, Cr, Cu, Mn and Zn) in freshwater Ulva (Chlorophyta) and its habitat

The accumulation of metal (Co, Cr, Cu, Mn and Zn) in freshwater Ulva (Chlorophyta) and its habitat

A contribution to the chemical characterization of rivers in the Rio Negro Basin, Brazil

Determination of Trace Elements in Fluoropolymers after Microwave-Induced Combustion

Contact Info

Product

Resources

About