Evaluation of a closed vessel acid digestion method for plant analyses using inductively coupled plasma spectrometry

Topper, K.; Kotuby‐Amacher, J.

doi:10.1080/00103629009368315

Cited by 54 publications

(21 citation statements)

References 5 publications

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“…Fe recoveries were low for both methods. Topper and Kotuby-Amacher (1990) found similar results for multiple certified materials comparing HNO 3 -HClO 4 and HNO 3 digestions. They reported low recoveries for Fe and Al by both methods.…”

Section: Laboratory Processingsupporting

confidence: 86%

Changes in Concentrations of Major Elements and Trace Metals in Northeastern U.S.-Canadian Sub-Alpine Forest Floors

Evans¹,

Norton

Fernandez

et al. 2005

Water Air Soil Pollut

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The forest floor at high elevation spruce-fir sites from southern Vermont, U.S. to the Gaspé Peninsula, Québec, Canada was sampled and analyzed in 1979 and re-sampled and analyzed in 1996 to study temporal changes in the impacts of atmospheric pollutants. We determined organic matter mass, pH, and concentrations of Al, Ca, Fe, K, Mg, Na, Cd, Cu, Hg, Pb, and Zn for the litter (L = fresh litter plus Oi horizon) and fermentation plus humic horizons (F + H) (= Oe plus Oa horizons) of the forest floor. There were no trends for Al or Fe concentrations in the 1979 or 1996 L along the transect. Several sites had significantly lower Al and Fe values in 1996 than in 1979, likely indicating less mineral soil in the 1996 samples. The 1996 concentrations of Ca in L increased along the transect from 0.22% dry weight (dw) in Vermont to 0.60% dw in Québec. Concentrations of Mg in L were relatively constant along the transect. Neither Ca nor Mg changed at sites from 1979 to 1996, indicating unchanged base status. Concentrations of Cd did not vary spatially along the transect but decreased at all sites from 1979 to 1996. Cu and Zn did not vary spatially or with time. In 1979, the concentration of Hg in L ranged between 150 and 300 µg kg −1 dw, with no spatial gradient. By 1996, Hg concentrations were 25 to 50% lower in L, with decreases generally proportional to the concentration in 1979. The concentration of Pb in 1979 L decreased significantly from 200 mg kg −1 dw in southern Vermont to 60 mg kg −1 dw in Québec. By 1996, the Pb concentration in L ranged between 32 and 66 mg kg −1 dw with no spatial trend along the transect. Decreases in Pb concentrations at sites were proportional to the absolute value in 1979. The concentrations of Cd, Hg, and Pb have declined in litter from 1979 to 1996, indicating a decline in atmospheric deposition. Higher Hg and Pb accumulation rates to the southwest are suggested for the past as indicated by (F + H) concentrations and inventories of Hg and Pb. The decline of Pb in L is consistent with the decreased use of leaded gasoline starting in the 1970s; the declines in Cd and Hg probably reflect lower emissions over the same period. Declining concentrations of Cd, Hg, and Pb in L parallel those documented in recent lake and peat sediments in the northeastern United States.

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Section: Laboratory Processingsupporting

confidence: 86%

Changes in Concentrations of Major Elements and Trace Metals in Northeastern U.S.-Canadian Sub-Alpine Forest Floors

Evans¹,

Norton

Fernandez

et al. 2005

Water Air Soil Pollut

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“…This technique has been applied to the dissolution of biological materials prior to Al determination by GFAAS (Skelly and Distefano, 1988;Nicholson et al, 1989). Some researchers have also addressed its application in foodstuff preparation (Schelenz and Zeiller, 1993;Friel et al, 1990;Topper and Kotuby-Amacher, 1990;Xu et al, 1992). However, a low Al recovery has been observed.…”

Section: Introductionmentioning

confidence: 94%

Closed-vessel microwave acid digestion of foodstuffs and trace aluminum determination by graphite furnace atomic absorption spectrometry

Yang¹,

Penninckx²,

Smeyers‐Verbeke³

1994

J. Agric. Food Chem.

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The estimation of the daily dietary intake of aluminum is part of an ongoing project aimed at the assessment of the daily intake of food constituents by the Belgian population. This requires a reliable analytical method that is applicable to different solid foodstuffs and can easily be implemented in an analytical laboratory. A method is proposed for the dissolution of food samples with microwave digestion (HNOS-H~O~ 2:0.5) and for the subsequent Al determination by graphite furnace atomic absorption spectrometry. The use of closed-vessel microwave acid digestion shortens the time for sample dissolution and improves the analysis quality. A direct calibration against aqueous solutions was used for all of the foodstuff digests. For the method validation, standard reference materials were analyzed. Aluminum was determined in 13 different types of bread and 30 types of fish. The limit of detection in solution is about 3 pg/L (30). Some samples with relatively higher aluminum content were identified.

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“…[23] The digestion was carried out unsealed at room temperature for 5 h, and then the vessels were sealed and placed in an oven at 110 • C overnight; at the end of the digestion, 18 m water was added to the samples to bring them to a uniform volume. To evaluate analytical recovery, a NIST Standard Reference Material (either 1570a, 1572 or 1547; US Department of Commerce, National Institute of Standards and Technology, Gaithersberg, MD) was digested with each group of samples, which were analyzed for Cd using Graphite Furnace Atomic Absorption Spectrometry (GF-AAS).…”

Section: Gf-aas For the Determination Of CDmentioning

confidence: 99%

Cadmium bioavailability and bioaccessibility as determined by in vitro digestion, dialysis and intestinal epithelial monolayers, and compared to in vivo data

Chan¹,

Black²,

Hale³

2007

Journal of Environmental Science and Health, Part A

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The objective of the study was to compare in vivo estimates of Cd bioavailability in two diet materials (lettuce and durum wheat grain) with bioaccessibility estimates from three in vitro methods. For both dietary materials, the Cd was either incorporated during growth or applied topically as a soluble salt just prior to experimentation. Simulated gastric/intestinal digestion using a physiologically based extraction technique (PBET) solubilized less than 56% (lettuce) or 13% (grain) of the Cd that was either incorporated into the plant tissues during growth, or added to the plant tissues before experimentation, as Cd(NO3)2.H2O. Amended diets could not be distinguished from incorporated diets. More of the Cd solubilized from amended lettuce than from incorporated lettuce moved to the outside of MWCO 10 kD and 25 kD dialysis sacs; no difference between the amended and incorporated diets was observed for grain. The percentage of lettuce-Cd solubilized by the PBET and sorbed by Caco-2 cells was greater for incorporated than for amended lettuce; for Cd in grain, the reverse occurred. As expected, none of the in vitro estimates of bioaccessibility were the same percentage of Cd in the lettuce or grain as was measured as bioavailable in vivo. The in vitro assays all predicted that substantially less than 100% of the Cd in the foods would be bioavailable, as was identified in vivo, and simulating intestinal selectivity improved the comparison to in vivo. Some of the in vitro assays identified subtle differences between the diets (i.e., amended vs. incorporated) that were consistent with in vivo studies, and with speculated differences in Cd speciation; this suggests their potential usefulness for the study of modifiers to dietary Cd bioavailability.

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Evaluation of a closed vessel acid digestion method for plant analyses using inductively coupled plasma spectrometry

Cited by 54 publications

References 5 publications

Changes in Concentrations of Major Elements and Trace Metals in Northeastern U.S.-Canadian Sub-Alpine Forest Floors

Changes in Concentrations of Major Elements and Trace Metals in Northeastern U.S.-Canadian Sub-Alpine Forest Floors

Closed-vessel microwave acid digestion of foodstuffs and trace aluminum determination by graphite furnace atomic absorption spectrometry

Cadmium bioavailability and bioaccessibility as determined by in vitro digestion, dialysis and intestinal epithelial monolayers, and compared to in vivo data

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