Search results for "Inorganic arsenic"
showing 6 items of 6 documents
Atomic fluorescence determination of total and inorganic arsenic species in beer
2001
A simple and nearly direct procedure has been developed for the determination of As in beers, based on hydride generation and atomic fluorescence detection. Using 2 mol l−1 HCl with a carrier flow of 6 ml min−1, 3% m/v NaBH4 with a flow of 1.3 ml min−1, a reaction coil of 200 cm and an argon flow of 400 ml min−1, total arsenic in beer could be determined in samples diluted 1∶10 with a final concentration of 2 mol l−1 HCl, 1% m/v KI and 0.08% v/v of an antifoam agent. For the estimation of AsIII and AsV concentrations in beer samples, the difference between the analytical sensitivities of the fluorescence signals obtained for As hydride, without and with previous treatment of samples with KI…
Inorganic arsenic species in groundwater: A case study from Purbasthali (Burdwan), India
1996
A regional groundwater quality survey from 20 tube wells in the Purbasthali area of the Burdwan district of West Bengal province (India) identified arsenic pollution in this area. Arsenic was detected in 19 cases at a concentration level 0.5 to 135.9 micrograms/L. Speciation studies indicate that As(III) is present in only one sample and organo-arsenic compounds have not been detected. Iron, antimony and pH of such water samples were also studied to see if there is any correlation of the presence of arsenic and these parameters. A high concentration of iron (0.3 to 10.7 mg/L) has been detected. Antimony is present in all these water samples (0.03 to 0.9 microgram/L). The pH value of the gro…
Biological effects of inorganic arsenic on primary cultures of rat astrocytes
2010
It is well established that inorganic arsenic induces neurotoxic effects and neurological defects in humans and laboratory animals. The cellular and molecular mechanisms of its actions, however, remain elusive. Herein we report the effects of arsenite (NaAsO2) on primary cultures of rat astrocytes. Cells underwent induction of heat shock protein 70 only at the highest doses of inorganic arsenic (30 and 60 microM), suggesting a high threshold to respond to stress. We also investigated arsenic genotoxicity with the comet assay. Interestingly, although cells treated with 10 microM arsenite for 24 h maintained >70% viability, with respect to untreated cells, high DNA damage was already observed…
Inorganic arsenic exposure and neuropsychological development of children of 4-5 years of age living in Spain
2019
This study was funded by grants from Spanish Institute of Health Carlos III-Ministry of Economy and Competitiveness (INMA Network G03/176, CB06/02/0041, and FIS-FEDER: PI03/1615, PI04/1436, PI08/1151, PI04/2018, PI04/1509, PI04/1112, PI04/1931, PI05/1079, PI05/1052, PI06/1213, PI06/0867, PI07/0314, PI09/02647, PS09/00090, PI09/02311, MS11/0178, PI13/1944, PI13/2032, PI14/00891, PI16/1288, and PI17/00663). Miguel Servet-FEDER: MSII16/ 00051, CP14/00108 & PI16/00261 (Co-funded by European Regional Development Fund “A way to make Europe”), FEDER funds, MS13/00054. Generalitat de Catalunya-CIRIT 1999SGR 00241, JCI2011–09771–MICINN, Generalitat Valenciana (Conselleria de Sanitat048/2010 and 060/…
Bioaccessibility of inorganic arsenic species in raw and cookedHizikia fusiformeseaweed
2004
Samples of Hizikia fusiforme edible seaweed, a commercially available dried food with high concentrations of total arsenic (t-As) and inorganic arsenic (i-As), both raw and cooked (boiling at 100 °C, 20 min), were selected for the bioaccessibility study. Cooking caused a significant reduction in the concentrations of t-As (30–43%) and i-As (46–50%), despite which the i-As contents in the cooked product were high (42.7–44.6 µg g−1 seaweed). An in vitro gastrointestinal digestion (pepsin, pH 2, and pancreatin–bile extract, pH 7) was applied to the seaweed to estimate arsenic bioaccessibility (maximum soluble concentration in gastrointestinal medium) of t-As, i-As, arsenic(III) and arsenic(V).…
Bioavailability of inorganic arsenic in cooked rice: practical aspects for human health risk assessments.
2005
Arsenic is present in rice grain mainly as inorganic arsenic. Little is known about the effect of cooking on inorganic arsenic content in rice and its bioavailability. This study evaluated total arsenic and inorganic arsenic in rice cooked with arsenic-contaminated water, the bioaccessibility of As(III) and As(V) after simulated gastrointestinal digestion, and the extent of arsenic retention and transport by Caco-2 cells used as a model of intestinal epithelia. After cooking, inorganic arsenic contents increase significantly. After simulated gastrointestinal digestion, the bioaccessibility of inorganic arsenic reached 63-99%; As(V) was the main species found. In Caco-2 cells, arsenic retent…