Direct preconcentration of trace elements in aqueous solutions on macroreticular acrylic ester resin

Corsini, A.; Chiang, Solomon.; Difruscia, R.

doi:10.1021/ac00245a039

Cited by 15 publications

(10 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The XAD-7 was washed successively with methanol, diethyl ether, and acetone to remove organic contaminants and then treated exactly as the SM-7. The borosilicate columns were as described before (18); both 10-and 20-cm columns were used. The columns were slurry-packed to bed heights of 3, 6, or 15 cm with resin in DDW.…”

Section: Methodsmentioning

confidence: 99%

“…Standard additions was not applied to NASS-1, owing to restrictions of its availability and cost. Blank controls were as previously specified (18). RESULTS AND DISCUSSION XAD-7 (SM-7) resin is a cross-linked polymer of methyl methacrylate and its structure and characteristics have been documented (24, 25).…”

Section: Methodsmentioning

confidence: 99%

“…RESULTS AND DISCUSSION XAD-7 (SM-7) resin is a cross-linked polymer of methyl methacrylate and its structure and characteristics have been documented (24, 25). Although its use for the retention and separation of organic solutes is well-known (e.g., ref 22 and 24), its application to the preconcentration of metal ions at trace levels has only recently been described (18). A reasonable mechanism to explain the retention of metal ions on the resin is ion exchange involving free carboxylic acid sites that would arise if methylation of the ester was incomplete.…”

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

“…Our previous work has shown that metal ions at low concentration in the presence of acetate and inorganic species such as NH4C1, NH4Br, NH4NO?, and NH4SCN are retained directly by SM-7 (XAD-7) resin (18). There was an indication, however, that with SM-7 natural ligands in a lake water sample prevented quantitative recovery of metal-ion spikes (18). This observation and the work of others on the adsorption of organic compounds on XAD resins (e.g., ref [19][20][21][22] prompted attempts in our laboratory to remove organic ligands, particularly humic materials, by passing the water sample through a precolumn of XAD-7 at pH 1-2, before preconcentration of the trace metals on the analytical column at pH 8.…”

mentioning

confidence: 99%

See 4 more Smart Citations

Two-column method for preconcentration of trace metals in natural waters on acrylate resin

Wan¹,

Chiang²,

Corsini³

1985

Anal. Chem.

Self Cite

View full text Add to dashboard Cite

sured; the AES results were supported by LEED measurements on the Cu (110) surface (12). Therefore, the estimated accuracy is about &lo%. In general, the systematic error for quantification of the surface coverage by the decrease in the matrix signal (5) is higher and depends mainly on the knowledge of the mean escape depth of the Auger electrons, which may be wrong by f30% (1 7).With conventional trace analysis techniques, e.g., acid digestion in combination with microtitrimetric or spectrophotometric determination of sulfur in metals, a detection limit of 0.2 ppm, an accuracy of typical *IO% at 2 ppm and I f l o % precision can be achieved with about 0.5 g of a sample consumed (18). As compared to these figures, the segregation/ sputtering and AES method shows comparable accuracy, better precision, lower detection limit, and negligible sample consumption (

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%